diff --git a/docs/4.0/browser-bugs.md b/docs/4.0/browser-bugs.md
index f02cb9a37e..1d8acc18b1 100644
--- a/docs/4.0/browser-bugs.md
+++ b/docs/4.0/browser-bugs.md
@@ -6,7 +6,7 @@ group: browser-bugs
 
 Bootstrap currently works around several outstanding browser bugs in major browsers to deliver the best cross-browser experience possible. Some bugs, like those listed below, cannot be solved by us.
 
-We publicly list browser bugs that are impacting us here, in the hopes of expediting the process of fixing them. For information on Bootstrap's browser compatibility, [see our browser compatibility docs]({{ site.baseurl }}/getting-started/browsers-devices/#supported-browsers).
+We publicly list browser bugs that are impacting us here, in the hopes of expediting the process of fixing them. For information on Bootstrap's browser compatibility, [see our browser compatibility docs]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/browsers-devices/#supported-browsers).
 
 See also:
 
diff --git a/docs/4.0/components/button-group.md b/docs/4.0/components/button-group.md
index f328b94227..e702bb76e9 100644
--- a/docs/4.0/components/button-group.md
+++ b/docs/4.0/components/button-group.md
@@ -8,7 +8,7 @@ toc: true
 
 ## Basic example
 
-Wrap a series of buttons with `.btn` in `.btn-group`. Add on optional JavaScript radio and checkbox style behavior with [our buttons plugin]({{ site.baseurl }}/components/buttons/#button-plugin).
+Wrap a series of buttons with `.btn` in `.btn-group`. Add on optional JavaScript radio and checkbox style behavior with [our buttons plugin]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/buttons/#button-plugin).
 
 {% example html %}
 <div class="btn-group" role="group" aria-label="Basic example">
diff --git a/docs/4.0/components/card.md b/docs/4.0/components/card.md
index ff3096ec2b..861378560d 100644
--- a/docs/4.0/components/card.md
+++ b/docs/4.0/components/card.md
@@ -206,7 +206,7 @@ Using the grid, wrap cards in columns and rows as needed.
 
 ### Using utilities
 
-Use our handful of [available sizing utilities]({{ site.baseurl }}/utilities/sizing/) to quickly set a card's width.
+Use our handful of [available sizing utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/sizing/) to quickly set a card's width.
 
 {% example html %}
 <div class="card w-75">
@@ -242,7 +242,7 @@ Use custom CSS in your stylesheets or as inline styles to set a width.
 
 ## Text alignment
 
-You can quickly change the text alignment of any card—in its entirety or specific parts—with our [text align classes]({{ site.baseurl }}/utilities/typography/#text-alignment).
+You can quickly change the text alignment of any card—in its entirety or specific parts—with our [text align classes]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/typography/#text-alignment).
 
 {% example html %}
 <div class="card" style="width: 20rem;">
@@ -272,7 +272,7 @@ You can quickly change the text alignment of any card—in its entirety or speci
 
 ## Navigation
 
-Add some navigation to a card's header (or block) with Bootstrap's [nav components]({{ site.baseurl }}/components/navs/).
+Add some navigation to a card's header (or block) with Bootstrap's [nav components]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/navs/).
 
 {% example html %}
 <div class="card text-center">
diff --git a/docs/4.0/components/carousel.md b/docs/4.0/components/carousel.md
index ae82eb08f5..0846a68be1 100644
--- a/docs/4.0/components/carousel.md
+++ b/docs/4.0/components/carousel.md
@@ -109,7 +109,7 @@ The `.active` class needs to be added to one of the slides. Otherwise, the carou
 
 ### With captions
 
-Add captions to your slides easily with the `.carousel-caption` element within any `.carousel-item`. They can be easily hidden on smaller viewports, as shown below, with optional [display utilities]({{ site.baseurl }}/utilities/display-property/). We hide them initially with `.d-none` and bring them back on medium-sized devices with `.d-md-block`.
+Add captions to your slides easily with the `.carousel-caption` element within any `.carousel-item`. They can be easily hidden on smaller viewports, as shown below, with optional [display utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/display-property/). We hide them initially with `.d-none` and bring them back on medium-sized devices with `.d-md-block`.
 
 <div class="bd-example">
   <div id="carouselExampleCaptions" class="carousel slide" data-ride="carousel">
diff --git a/docs/4.0/components/collapse.md b/docs/4.0/components/collapse.md
index 84262487b3..cbdc50bb72 100644
--- a/docs/4.0/components/collapse.md
+++ b/docs/4.0/components/collapse.md
@@ -34,7 +34,7 @@ You can use a link with the `href` attribute, or a button with the `data-target`
 
 ## Accordion example
 
-Using the [card]({{ site.baseurl }}/components/card/) component, you can extend the default collapse behavior to create an accordion.
+Using the [card]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/card/) component, you can extend the default collapse behavior to create an accordion.
 
 {% example html %}
 <div id="accordion" role="tablist">
diff --git a/docs/4.0/components/forms.md b/docs/4.0/components/forms.md
index 366f8f6256..87f47a7baf 100644
--- a/docs/4.0/components/forms.md
+++ b/docs/4.0/components/forms.md
@@ -8,7 +8,7 @@ toc: true
 
 ## Form controls
 
-Bootstrap's form controls expand on [our Rebooted form styles]({{ site.baseurl }}/content/reboot/#forms) with classes. Use these classes to opt into their customized displays for a more consistent rendering across browsers and devices. The example form below demonstrates common HTML form elements that receive updated styles from Bootstrap with additional classes.
+Bootstrap's form controls expand on [our Rebooted form styles]({{ site.baseurl }}/docs/{{ site.docs_version }}/content/reboot/#forms) with classes. Use these classes to opt into their customized displays for a more consistent rendering across browsers and devices. The example form below demonstrates common HTML form elements that receive updated styles from Bootstrap with additional classes.
 
 Remember, since Bootstrap utilizes the HTML5 doctype, **all inputs must have a `type` attribute**.
 
@@ -269,11 +269,11 @@ The `.form-group` class is the easiest way to add some structure to forms. Its o
 
 Use the `.form-inline` class to display a series of labels, form controls, and buttons on a single horizontal row. Form controls within inline forms vary slightly from their default states.
 
-- Controls are `display: flex`, collapsing any HTML white space and allowing you to provide alignment control with [spacing]({{ site.baseurl }}/utilities/spacing/) and [flexbox]({{ site.baseurl }}/utilities/flexbox/) utilities.
+- Controls are `display: flex`, collapsing any HTML white space and allowing you to provide alignment control with [spacing]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/) and [flexbox]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/flexbox/) utilities.
 - Controls and input groups receive `width: auto` to override the Bootstrap default `width: 100%`.
 - Controls **only appear inline in viewports that are at least 576px wide** to account for narrow viewports on mobile devices.
 
-You may need to manually address the width and alignment of individual form controls with [spacing utilities]({{ site.baseurl }}/utilities/spacing/) (as shown below). Lastly, be sure to always include a `<label>` with each form control, even if you need to hide it from non-screenreader visitors with `.sr-only`.
+You may need to manually address the width and alignment of individual form controls with [spacing utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/) (as shown below). Lastly, be sure to always include a `<label>` with each form control, even if you need to hide it from non-screenreader visitors with `.sr-only`.
 
 {% example html %}
 <form class="form-inline">
@@ -325,7 +325,7 @@ Assistive technologies such as screen readers will have trouble with your forms
 
 ### Using the Grid
 
-For more structured form layouts that are also responsive, you can utilize Bootstrap's [predefined grid classes]({{ site.baseurl }}/layout/grid/) or [mixins]({{ site.baseurl }}/layout/grid/#sass-mixins) to create horizontal forms. Add the `.row` class to form groups and use the `.col-*-*` classes to specify the width of your labels and controls.
+For more structured form layouts that are also responsive, you can utilize Bootstrap's [predefined grid classes]({{ site.baseurl }}/docs/{{ site.docs_version }}/layout/grid/) or [mixins]({{ site.baseurl }}/docs/{{ site.docs_version }}/layout/grid/#sass-mixins) to create horizontal forms. Add the `.row` class to form groups and use the `.col-*-*` classes to specify the width of your labels and controls.
 
 Be sure to add `.col-form-label` to your `<label>`s as well so they're vertically centered with their associated form controls. For `<legend>` elements, you can use `.col-form-legend` to make them appear similar to regular `<label>` elements.
 
@@ -632,7 +632,7 @@ Add the `disabled` attribute to a `<fieldset>` to disable all the controls withi
 {% callout warning %}
 #### Caveat with anchors
 
-By default, browsers will treat all native form controls (`<input>`, `<select>` and `<button>` elements) inside a `<fieldset disabled>` as disabled, preventing both keyboard and mouse interactions on them. However, if your form also includes `<a ... class="btn btn-*">` elements, these will only be given a style of `pointer-events: none`. As noted in the section about [disabled state for buttons]({{ site.baseurl }}/components/buttons/#disabled-state) (and specifically in the sub-section for anchor elements), this CSS property is not yet standardized and isn't fully supported in Opera 18 and below, or in Internet Explorer 11, and won't prevent keyboard users from being able to focus or activate these links. So to be safe, use custom JavaScript to disable such links.
+By default, browsers will treat all native form controls (`<input>`, `<select>` and `<button>` elements) inside a `<fieldset disabled>` as disabled, preventing both keyboard and mouse interactions on them. However, if your form also includes `<a ... class="btn btn-*">` elements, these will only be given a style of `pointer-events: none`. As noted in the section about [disabled state for buttons]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/buttons/#disabled-state) (and specifically in the sub-section for anchor elements), this CSS property is not yet standardized and isn't fully supported in Opera 18 and below, or in Internet Explorer 11, and won't prevent keyboard users from being able to focus or activate these links. So to be safe, use custom JavaScript to disable such links.
 {% endcallout %}
 
 {% callout danger %}
@@ -755,7 +755,7 @@ Generally speaking, you'll want to use a particular state for specific types of
 
 Using these validation styles to denote the state of a form control only provides a visual, color-based indication, which will not be conveyed to users of assistive technologies - such as screen readers - or to colorblind users.
 
-Ensure that an alternative indication of state is also provided. For instance, you can include a hint about state in the form control's `<label>` text itself (as is the case in the following code example), include a [Glyphicon]({{ site.baseurl }}/components/#glyphicons) (with appropriate alternative text using the `.sr-only` class - see the [Glyphicon examples]({{ site.baseurl }}/components/#glyphicons-examples)), or by providing an additional [help text](#forms-help-text) block. Specifically for assistive technologies, invalid form controls can also be assigned an `aria-invalid="true"` attribute.
+Ensure that an alternative indication of state is also provided. For instance, you can include a hint about state in the form control's `<label>` text itself (as is the case in the following code example), include a [Glyphicon]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/#glyphicons) (with appropriate alternative text using the `.sr-only` class - see the [Glyphicon examples]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/#glyphicons-examples)), or by providing an additional [help text](#forms-help-text) block. Specifically for assistive technologies, invalid form controls can also be assigned an `aria-invalid="true"` attribute.
 {% endcallout %}
 {% endcomment %}
 
diff --git a/docs/4.0/components/list-group.md b/docs/4.0/components/list-group.md
index f67f3c86e7..4e544ce184 100644
--- a/docs/4.0/components/list-group.md
+++ b/docs/4.0/components/list-group.md
@@ -111,7 +111,7 @@ Contextual classes also work with `.list-group-item-action`. Note the addition o
 
 ## With badges
 
-Add badges to any list group item to show unread counts, activity, and more with the help of some [utilities]({{ site.baseurl }}/utilities/flexbox/).
+Add badges to any list group item to show unread counts, activity, and more with the help of some [utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/flexbox/).
 
 {% example html %}
 <ul class="list-group">
@@ -132,7 +132,7 @@ Add badges to any list group item to show unread counts, activity, and more with
 
 ## Custom content
 
-Add nearly any HTML within, even for linked list groups like the one below, with the help of [flexbox utilities]({{ site.baseurl }}/utilities/flexbox/).
+Add nearly any HTML within, even for linked list groups like the one below, with the help of [flexbox utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/flexbox/).
 
 {% example html %}
 <div class="list-group">
diff --git a/docs/4.0/components/modal.md b/docs/4.0/components/modal.md
index 8abb6a9c24..913f81eb0d 100644
--- a/docs/4.0/components/modal.md
+++ b/docs/4.0/components/modal.md
@@ -14,7 +14,7 @@ Before getting started with Bootstrap's modal component, be sure to read the fol
 - Clicking on the modal "backdrop" will automatically close the modal.
 - Bootstrap only supports one modal window at a time. Nested modals aren't supported as we believe them to be poor user experiences.
 - Modals use `position: fixed`, which can sometimes be a bit particular about its rendering. Whenever possible, place your modal HTML in a top-level position to avoid potential interference from other elements. You'll likely run into issues when nesting a `.modal` within another fixed element.
-- Once again, due to `position: fixed`, there are some caveats with using modals on mobile devices. [See our browser support docs]({{ site.baseurl }}/getting-started/browsers-devices/#modals-and-dropdowns-on-mobile) for details.
+- Once again, due to `position: fixed`, there are some caveats with using modals on mobile devices. [See our browser support docs]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/browsers-devices/#modals-and-dropdowns-on-mobile) for details.
 - Lastly, the `autofocus` HTML attribute has no effect in modals. Here's how you can achieve the same effect with custom JavaScript.
 
 Keep reading for demos and usage guidelines.
@@ -213,7 +213,7 @@ When modals become too long for the user's viewport or device, they scroll indep
 
 ### Tooltips and popovers
 
-[Tooltips]({{ site.baseurl }}/components/tooltips/) and [popovers]({{ site.baseurl }}/components/popovers/) can be placed within modals as needed. When modals are closed, any tooltips and popovers within are also automatically dismissed.
+[Tooltips]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/tooltips/) and [popovers]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/popovers/) can be placed within modals as needed. When modals are closed, any tooltips and popovers within are also automatically dismissed.
 
 <div id="exampleModalPopovers" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="exampleModalPopoversLabel" aria-hidden="true">
   <div class="modal-dialog" role="document">
diff --git a/docs/4.0/components/navs.md b/docs/4.0/components/navs.md
index 2e340287df..50526e883c 100644
--- a/docs/4.0/components/navs.md
+++ b/docs/4.0/components/navs.md
@@ -50,7 +50,7 @@ Change the style of `.nav`s component with modifiers and utilities. Mix and matc
 
 ### Horizontal alignment
 
-Change the horizontal alignment of your nav with [flexbox utilities]({{ site.baseurl }}/layout/grid/#horizontal-alignment). By default, navs are left-aligned, but you can easily change them to center or right aligned.
+Change the horizontal alignment of your nav with [flexbox utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/layout/grid/#horizontal-alignment). By default, navs are left-aligned, but you can easily change them to center or right aligned.
 
 Centered with `.justify-content-center`:
 
@@ -220,7 +220,7 @@ Similar to the `.nav-fill` example using a `<nav>`-based navigation, be sure to
 {% endexample %}
 ## Working with flex utilities
 
-If you need responsive nav variations, consider using a series of [flexbox utilities]({{ site.baseurl }}/utilities/flexbox/). While more verbose, these utilities offer greater customization across responsive breakpoints. In the example below, our nav will be stacked on the lowest breakpoint, then adapt to a horizontal layout that fills the available width starting from the small breakpoint.
+If you need responsive nav variations, consider using a series of [flexbox utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/flexbox/). While more verbose, these utilities offer greater customization across responsive breakpoints. In the example below, our nav will be stacked on the lowest breakpoint, then adapt to a horizontal layout that fills the available width starting from the small breakpoint.
 
 {% example html %}
 <nav class="nav nav-pills flex-column flex-sm-row">
@@ -239,7 +239,7 @@ Note that navigation bars, even if visually styled as tabs with the `.nav-tabs`
 
 ## Using dropdowns
 
-Add dropdown menus with a little extra HTML and the [dropdowns JavaScript plugin]({{ site.baseurl }}/components/dropdowns/#usage).
+Add dropdown menus with a little extra HTML and the [dropdowns JavaScript plugin]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/dropdowns/#usage).
 
 ### Tabs with dropdowns
 
diff --git a/docs/4.0/components/pagination.md b/docs/4.0/components/pagination.md
index 0ea749e301..0235f7da45 100644
--- a/docs/4.0/components/pagination.md
+++ b/docs/4.0/components/pagination.md
@@ -135,7 +135,7 @@ Fancy larger or smaller pagination? Add `.pagination-lg` or `.pagination-sm` for
 
 ## Alignment
 
-Change the alignment of pagination components with [flexbox utilities]({{ site.baseurl }}/utilities/flexbox/).
+Change the alignment of pagination components with [flexbox utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/flexbox/).
 
 {% example html %}
 <nav aria-label="Page navigation example">
diff --git a/docs/4.0/components/popovers.md b/docs/4.0/components/popovers.md
index a7750d635d..6aa3bb2693 100644
--- a/docs/4.0/components/popovers.md
+++ b/docs/4.0/components/popovers.md
@@ -12,7 +12,7 @@ Things to know when using the popover plugin:
 
 
 - Popovers rely on the 3rd party library [Popper.js](https://popper.js.org) for positioning. You must include [popper.min.js](https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.9.9/umd/popper.min.js) before bootstrap.js in order for popovers to work!
-- Popovers require the [tooltip plugin]({{ site.baseurl }}/components/tooltips/) as a dependency.
+- Popovers require the [tooltip plugin]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/tooltips/) as a dependency.
 - Popovers are opt-in for performance reasons, so **you must initialize them yourself**.
 - Zero-length `title` and `content` values will never show a popover.
 - Specify `container: 'body'` to avoid rendering problems in more complex components (like our input groups, button groups, etc).
diff --git a/docs/4.0/components/progress.md b/docs/4.0/components/progress.md
index 5b9fcd924a..4cbc333aaf 100644
--- a/docs/4.0/components/progress.md
+++ b/docs/4.0/components/progress.md
@@ -35,7 +35,7 @@ Put that all together, and you have the following examples.
 </div>
 {% endexample %}
 
-Bootstrap provides a handful of [utilities for setting width]({{ site.baseurl }}/utilities/sizing/). Depending on your needs, these may help with quickly configuring progress.
+Bootstrap provides a handful of [utilities for setting width]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/sizing/). Depending on your needs, these may help with quickly configuring progress.
 
 {% example html %}
 <div class="progress">
diff --git a/docs/4.0/components/scrollspy.md b/docs/4.0/components/scrollspy.md
index a2829d3e53..ca9dcec5a2 100644
--- a/docs/4.0/components/scrollspy.md
+++ b/docs/4.0/components/scrollspy.md
@@ -10,7 +10,7 @@ toc: true
 
 Scrollspy has a few requirements to function properly:
 
-- It must to be used on a Bootstrap [nav component]({{ site.baseurl }}/components/navs/) or [list group]({{ site.baseurl }}/components/list-group/).
+- It must to be used on a Bootstrap [nav component]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/navs/) or [list group]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/list-group/).
 - Scrollspy requires `position: relative;` on the element you're spying on, usually the `<body>`.
 - When spying on elements other than the `<body>`, be sure to have a `height` set and `overflow-y: scroll;` applied.
 - Anchors (`<a>`) are required and must point to an element with that `id`.
diff --git a/docs/4.0/content/figures.md b/docs/4.0/content/figures.md
index 4f90018c90..e7c181cabd 100644
--- a/docs/4.0/content/figures.md
+++ b/docs/4.0/content/figures.md
@@ -16,7 +16,7 @@ Use the included `.figure` , `.figure-img` and `.figure-caption` classes to prov
 </figure>
 {% endexample %}
 
-Aligning the figure's caption is easy with our [text utilities]({{ site.baseurl }}/utilities/typography/#text-alignment).
+Aligning the figure's caption is easy with our [text utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/typography/#text-alignment).
 
 {% example html %}
 <figure class="figure">
diff --git a/docs/4.0/content/images.md b/docs/4.0/content/images.md
index dc4ce9a9af..2198889c77 100644
--- a/docs/4.0/content/images.md
+++ b/docs/4.0/content/images.md
@@ -26,7 +26,7 @@ In Internet Explorer 10, SVG images with `.img-fluid` are disproportionately siz
 
 ## Image thumbnails
 
-In addition to our [border-radius utilities]({{ site.baseurl }}/utilities/borders/), you can use `.img-thumbnail` to give an image a rounded 1px border appearance.
+In addition to our [border-radius utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/borders/), you can use `.img-thumbnail` to give an image a rounded 1px border appearance.
 
 <div class="bd-example bd-example-images">
   <img data-src="holder.js/200x200" class="img-thumbnail" alt="A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera">
@@ -38,7 +38,7 @@ In addition to our [border-radius utilities]({{ site.baseurl }}/utilities/border
 
 ## Aligning images
 
-Align images with the [helper float classes]({{ site.baseurl }}/utilities/responsive-helpers/#responsive-floats) or [text alignment classes]({{ site.baseurl }}/utilities/typography/#text-alignment). `block`-level images can be centered using [the `.mx-auto` margin utility class]({{ site.baseurl }}/utilities/spacing/#horizontal-centering).
+Align images with the [helper float classes]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/responsive-helpers/#responsive-floats) or [text alignment classes]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/typography/#text-alignment). `block`-level images can be centered using [the `.mx-auto` margin utility class]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/#horizontal-centering).
 
 <div class="bd-example bd-example-images">
   <img data-src="holder.js/200x200" class="rounded float-left" alt="A generic square placeholder image with rounded corners">
diff --git a/docs/4.0/content/reboot.md b/docs/4.0/content/reboot.md
index a9dd6a6d0a..dfdfb4115c 100644
--- a/docs/4.0/content/reboot.md
+++ b/docs/4.0/content/reboot.md
@@ -162,7 +162,7 @@ The `<pre>` element is reset to remove its `margin-top` and use `rem` units for
 
 ## Tables
 
-Tables are slightly adjusted to style `<caption>`s, collapse borders, and ensure consistent `text-align` throughout. Additional changes for borders, padding, and more come with [the `.table` class]({{ site.baseurl }}/content/tables/).
+Tables are slightly adjusted to style `<caption>`s, collapse borders, and ensure consistent `text-align` throughout. Additional changes for borders, padding, and more come with [the `.table` class]({{ site.baseurl }}/docs/{{ site.docs_version }}/content/tables/).
 
 <div class="bd-example">
   <table>
@@ -342,15 +342,15 @@ HTML5 adds [a new global attribute named `[hidden]`](https://developer.mozilla.o
 `[hidden]` is not compatible with jQuery's `$(...).hide()` and `$(...).show()` methods. This could potentially change in jQuery 3, but we're not holding our breath. Therefore, we don't currently especially endorse `[hidden]` over other techniques for managing the `display` of elements.
 {% endcallout %}
 
-To merely toggle the visibility of an element, meaning its `display` is not modified and the element can still affect the flow of the document, use [the `.invisible` class]({{ site.baseurl }}/utilities/invisible-content/) instead.
+To merely toggle the visibility of an element, meaning its `display` is not modified and the element can still affect the flow of the document, use [the `.invisible` class]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/invisible-content/) instead.
 
 ## Click delay optimization for touch
 
 Traditionally, browsers on touchscreen devices have a delay of approximately 300ms between the end of a "tap" – the moment when a finger/stylus is lifted from screen – and the [`click` event](https://developer.mozilla.org/en-US/docs/Web/Events/click) being fired. This delay is necessary for these browsers to correctly handle "double-tap to zoom" gestures without prematurely triggering actions or links after the first "tap", but it can make your site feel slightly sluggish and unresponsive.
 
-Most mobile browsers automatically optimize away this 300ms delay for sites that use the `width=device-width` property as part of their [responsive meta tag]({{ site.baseurl }}/getting-started/introduction/#responsive-meta-tag) (as well as for sites that disable zooming, for instance with `user-scalable=no`, though this practice is strongly discouraged for accessibility and usability reasons). The biggest exceptions here are IE11 on Windows Phone 8.1, and iOS Safari (and any other iOS WebView-based browser) [prior to iOS 9.3](https://webkit.org/blog/5610/more-responsive-tapping-on-ios/).
+Most mobile browsers automatically optimize away this 300ms delay for sites that use the `width=device-width` property as part of their [responsive meta tag]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/introduction/#responsive-meta-tag) (as well as for sites that disable zooming, for instance with `user-scalable=no`, though this practice is strongly discouraged for accessibility and usability reasons). The biggest exceptions here are IE11 on Windows Phone 8.1, and iOS Safari (and any other iOS WebView-based browser) [prior to iOS 9.3](https://webkit.org/blog/5610/more-responsive-tapping-on-ios/).
 
-On touch-enabled laptop/desktop devices, IE11 and Microsoft Edge are currently the only browsers with "double-tap to zoom" functionality. As the [responsive meta tag]({{ site.baseurl }}/getting-started/introduction/#responsive-meta-tag) is ignored by all desktop browsers, using `width=device-width` will have no effect on the 300ms delay here.
+On touch-enabled laptop/desktop devices, IE11 and Microsoft Edge are currently the only browsers with "double-tap to zoom" functionality. As the [responsive meta tag]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/introduction/#responsive-meta-tag) is ignored by all desktop browsers, using `width=device-width` will have no effect on the 300ms delay here.
 
 To address this problem in IE11 and Microsoft Edge on desktop, as well as IE11 on Windows Phone 8.1, Bootstrap explicitly uses the [`touch-action:manipulation` CSS property](https://developer.mozilla.org/en-US/docs/Web/CSS/touch-action) on all interactive elements (such as buttons and links). This property essentially disables double-tap functionality on those elements, eliminating the 300ms delay.
 
diff --git a/docs/4.0/content/tables.md b/docs/4.0/content/tables.md
index c7523b8394..8d4fcfe64f 100644
--- a/docs/4.0/content/tables.md
+++ b/docs/4.0/content/tables.md
@@ -533,7 +533,7 @@ Use contextual classes to color table rows or individual cells.
 </tr>
 {% endhighlight %}
 
-Regular table background variants are not available with the inverse table, however, you may use [text or background utilities]({{ site.baseurl }}/utilities/colors/) to achieve similar styles.
+Regular table background variants are not available with the inverse table, however, you may use [text or background utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/colors/) to achieve similar styles.
 
 <div class="bd-example">
   <table class="table table-inverse">
diff --git a/docs/4.0/content/typography.md b/docs/4.0/content/typography.md
index 754b0ac1b2..338c413aeb 100644
--- a/docs/4.0/content/typography.md
+++ b/docs/4.0/content/typography.md
@@ -8,9 +8,9 @@ toc: true
 
 ## Global settings
 
-Bootstrap sets basic global display, typography, and link styles. When more control is needed, check out the [textual utility classes]({{ site.baseurl }}/utilities/typography/).
+Bootstrap sets basic global display, typography, and link styles. When more control is needed, check out the [textual utility classes]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/typography/).
 
-- Use a [native font stack]({{ site.baseurl }}/content/reboot/#native-font-stack) that selects the best `font-family` for each OS and device.
+- Use a [native font stack]({{ site.baseurl }}/docs/{{ site.docs_version }}/content/reboot/#native-font-stack) that selects the best `font-family` for each OS and device.
 - For a more inclusive and accessible type scale, we assume the browser default root `font-size` (typically 16px) so visitors can customize their browser defaults as needed.
 - Use the `$font-family-base`, `$font-size-base`, and `$line-height-base` attributes as our typographic base applied to the `<body>`.
 - Set the global link color via `$link-color` and apply link underlines only on `:hover`.
@@ -168,7 +168,7 @@ While not shown above, feel free to use `<b>` and `<i>` in HTML5. `<b>` is meant
 
 ## Text utilities
 
-Change text alignment, transform, style, weight, and color with our [text utilities]({{ site.baseurl }}/utilities/typography/#text-alignment).
+Change text alignment, transform, style, weight, and color with our [text utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/typography/#text-alignment).
 
 ## Abbreviations
 
diff --git a/docs/4.0/getting-started/browsers-devices.md b/docs/4.0/getting-started/browsers-devices.md
index 9fe08bbb67..426692b329 100644
--- a/docs/4.0/getting-started/browsers-devices.md
+++ b/docs/4.0/getting-started/browsers-devices.md
@@ -97,7 +97,7 @@ For Firefox, in addition to the latest normal stable release, we also support th
 
 Unofficially, Bootstrap should look and behave well enough in Chromium and Chrome for Linux, Firefox for Linux, and Internet Explorer 9, though they are not officially supported.
 
-For a list of some of the browser bugs that Bootstrap has to grapple with, see our [Wall of browser bugs]({{ site.baseurl }}/browser-bugs/).
+For a list of some of the browser bugs that Bootstrap has to grapple with, see our [Wall of browser bugs]({{ site.baseurl }}/docs/{{ site.docs_version }}/browser-bugs/).
 
 ## Internet Explorer
 
diff --git a/docs/4.0/getting-started/download.md b/docs/4.0/getting-started/download.md
index dc85ef50a2..75e3609a54 100644
--- a/docs/4.0/getting-started/download.md
+++ b/docs/4.0/getting-started/download.md
@@ -15,7 +15,7 @@ toc: true
 <a href="{{ site.download.dist }}" class="btn btn-lg btn-bs" onclick="ga('send', 'event', 'Getting started', 'Download', 'Download Bootstrap');">Download Bootstrap</a>
 
 ## Source files
-**Want to compile Bootstrap with your project's asset pipeline?** Choose this option to download our source Sass, JavaScript, and documentation files. Requires a Sass compiler, [Autoprefixer](https://github.com/postcss/autoprefixer), [postcss-flexbugs-fixes](https://github.com/luisrudge/postcss-flexbugs-fixes), and [some setup]({{ site.baseurl }}/getting-started/build-tools/#tooling-setup).
+**Want to compile Bootstrap with your project's asset pipeline?** Choose this option to download our source Sass, JavaScript, and documentation files. Requires a Sass compiler, [Autoprefixer](https://github.com/postcss/autoprefixer), [postcss-flexbugs-fixes](https://github.com/luisrudge/postcss-flexbugs-fixes), and [some setup]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/build-tools/#tooling-setup).
 
 <a href="{{ site.download.source }}" class="btn btn-bs" onclick="ga('send', 'event', 'Getting started', 'Download', 'Download source');">Download source</a>
 
diff --git a/docs/4.0/getting-started/introduction.md b/docs/4.0/getting-started/introduction.md
index a9714eb6d7..04dfdd7332 100644
--- a/docs/4.0/getting-started/introduction.md
+++ b/docs/4.0/getting-started/introduction.md
@@ -16,7 +16,7 @@ toc: true
 
 ## Quick start
 
-Looking to quickly add Bootstrap to your project? Use the Bootstrap CDN, provided for free by the folks at MaxCDN. Using a package manager or need to download the source files? [Head to the downloads page.]({{ site.baseurl }}/getting-started/download/)
+Looking to quickly add Bootstrap to your project? Use the Bootstrap CDN, provided for free by the folks at MaxCDN. Using a package manager or need to download the source files? [Head to the downloads page.]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/download/)
 
 Copy-paste the stylesheet `<link>` into your `<head>` before all other stylesheets to load our CSS.
 
@@ -60,7 +60,7 @@ Be sure to have your pages set up with the latest design and development standar
 </html>
 {% endhighlight %}
 
-That's all you need for overall page requirements. Visit the [Layout docs]({{ site.baseurl }}/layout/overview/) or [our official examples]({{ site.baseurl }}/examples/) to start laying out your site's content and components.
+That's all you need for overall page requirements. Visit the [Layout docs]({{ site.baseurl }}/docs/{{ site.docs_version }}/layout/overview/) or [our official examples]({{ site.baseurl }}/docs/{{ site.docs_version }}/examples/) to start laying out your site's content and components.
 
 ## Important globals
 
@@ -105,7 +105,7 @@ Learn more about [box model and sizing at CSS Tricks](https://css-tricks.com/box
 
 ### Reboot
 
-For improved cross-browser rendering, we use [Reboot]({{ site.baseurl }}/content/reboot/) to correct inconsistencies across browsers and devices while providing slightly more opinionated resets to common HTML elements.
+For improved cross-browser rendering, we use [Reboot]({{ site.baseurl }}/docs/{{ site.docs_version }}/content/reboot/) to correct inconsistencies across browsers and devices while providing slightly more opinionated resets to common HTML elements.
 
 ## Community
 
diff --git a/docs/4.0/layout/grid.md b/docs/4.0/layout/grid.md
index d0bfe416a2..7e256f235c 100644
--- a/docs/4.0/layout/grid.md
+++ b/docs/4.0/layout/grid.md
@@ -37,7 +37,7 @@ Breaking it down, here's how it works:
 - Column classes indicate the number of columns you'd like to use out of the possible 12 per row. So, if you want three equal-width columns, you can use `.col-sm-4`.
 - Column `width`s are set in percentages, so they're always fluid and sized relative to their parent element.
 - Columns have horizontal `padding` to create the gutters between individual columns, however, you can remove the `margin` from rows and `padding` from columns with `.no-gutters` on the `.row`.
-- There are five grid tiers, one for each [responsive breakpoint]({{ site.baseurl }}/layout/overview/#responsive-breakpoints): all breakpoints (extra small), small, medium, large, and extra large.
+- There are five grid tiers, one for each [responsive breakpoint]({{ site.baseurl }}/docs/{{ site.docs_version }}/layout/overview/#responsive-breakpoints): all breakpoints (extra small), small, medium, large, and extra large.
 - Grid tiers are based on minimum widths, meaning they apply to that one tier and all those above it (e.g., `.col-sm-4` applies to small, medium, large, and extra large devices).
 - You can use predefined grid classes or Sass mixins for more semantic markup.
 
@@ -242,7 +242,7 @@ Use `col-{breakpoint}-auto` classes to size columns based on the natural width o
 
 ### Equal-width multi-row
 
-Create equal-width columns that span multiple rows by inserting a `.w-100` where you want the columns to break to a new line. Make the breaks responsive by mixing the `.w-100` with some [responsive display utilities]({{ site.baseurl }}/utilities/display-property/).
+Create equal-width columns that span multiple rows by inserting a `.w-100` where you want the columns to break to a new line. Make the breaks responsive by mixing the `.w-100` with some [responsive display utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/display-property/).
 
 <div class="bd-example-row">
 {% example html %}
@@ -441,7 +441,7 @@ Use flexbox alignment utilities to vertically and horizontally align columns.
 
 The gutters between columns in our predefined grid classes can be removed with `.no-gutters`. This removes the negative `margin`s from `.row` and the horizontal `padding` from all immediate children columns.
 
-Here's the source code for creating these styles. Note that column overrides are scoped to only the first children columns and are targeted via [attribute selector](https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors). While this generates a more specific selector, column padding can still be further customized with [spacing utilities]({{ site.baseurl }}/utilities/spacing/).
+Here's the source code for creating these styles. Note that column overrides are scoped to only the first children columns and are targeted via [attribute selector](https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors). While this generates a more specific selector, column padding can still be further customized with [spacing utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/).
 
 {% highlight sass %}
 .no-gutters {
@@ -483,7 +483,7 @@ If more than 12 columns are placed within a single row, each group of extra colu
 
 ### Column resets
 
-With the handful of grid tiers available, you're bound to run into issues where, at certain breakpoints, your columns don't clear quite right as one is taller than the other. To fix that, use a combination of a `.clearfix` and our [responsive display utilities]({{ site.baseurl }}/utilities/display/).
+With the handful of grid tiers available, you're bound to run into issues where, at certain breakpoints, your columns don't clear quite right as one is taller than the other. To fix that, use a combination of a `.clearfix` and our [responsive display utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/display/).
 
 <div class="bd-example-row">
 {% example html %}
@@ -500,7 +500,7 @@ With the handful of grid tiers available, you're bound to run into issues where,
 {% endexample %}
 </div>
 
-In addition to column clearing at responsive breakpoints, you may need to **reset offsets, pushes, or pulls**. See this in action in [the grid example]({{ site.baseurl }}/examples/grid/).
+In addition to column clearing at responsive breakpoints, you may need to **reset offsets, pushes, or pulls**. See this in action in [the grid example]({{ site.baseurl }}/docs/{{ site.docs_version }}/examples/grid/).
 
 <div class="bd-example-row">
 {% example html %}
diff --git a/docs/4.0/layout/media-object.md b/docs/4.0/layout/media-object.md
index 5023e45808..64f66bb9ec 100644
--- a/docs/4.0/layout/media-object.md
+++ b/docs/4.0/layout/media-object.md
@@ -10,7 +10,7 @@ toc: true
 
 The [media object](http://www.stubbornella.org/content/2010/06/25/the-media-object-saves-hundreds-of-lines-of-code/) helps build complex and repetitive components where some media is positioned alongside content that doesn't wrap around said media. Plus, it does this with only two required classes thanks to flexbox.
 
-Below is an example of a single media object. Only two classes are required—the wrapping `.media` and the `.media-body` around your content. Optional padding and margin can be controlled through [spacing utilities]({{ site.baseurl }}/utilities/spacing/).
+Below is an example of a single media object. Only two classes are required—the wrapping `.media` and the `.media-body` around your content. Optional padding and margin can be controlled through [spacing utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/).
 
 {% example html %}
 <div class="media">
@@ -25,7 +25,7 @@ Below is an example of a single media object. Only two classes are required—th
 {% callout warning %}
 ##### Flexbug #12: Inline elements aren't treated as flex items
 
-Internet Explorer 10-11 do not render inline elements like links or images (or `::before` and `::after` pseudo-elements) as flex items. The only workaround is to set a non-inline `display` value (e.g., `block`, `inline-block`, or `flex`). We suggest using `.d-flex`, one of our [display utilities]({{ site.baseurl }}/utilities/display-property/), as an easy fix.
+Internet Explorer 10-11 do not render inline elements like links or images (or `::before` and `::after` pseudo-elements) as flex items. The only workaround is to set a non-inline `display` value (e.g., `block`, `inline-block`, or `flex`). We suggest using `.d-flex`, one of our [display utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/display-property/), as an easy fix.
 
 **Source:** [Flexbugs on GitHub](https://github.com/philipwalton/flexbugs#12-inline-elements-are-not-treated-as-flex-items)
 {% endcallout %}
diff --git a/docs/4.0/migration.md b/docs/4.0/migration.md
index 269e2e78ea..59ffaacbee 100644
--- a/docs/4.0/migration.md
+++ b/docs/4.0/migration.md
@@ -155,7 +155,7 @@ The navbar has been entirely rewritten in flexbox with improved support for alig
 
 - Responsive navbar behaviors are now applied to the `.navbar` class via the **required** `.navbar-expand-{breakpoint}` where you choose where to collapse the navbar. Previously this was a Less variable modification and required recompiling.
 - `.navbar-default` is now `.navbar-light`, though `.navbar-inverse` remains the same. **One of these is required on each navbar.** However, these classes no longer set `background-color`s; instead they essentiatlly only affect `color`.
-- Navbars now require a background declaration of some kind. Choose from our background utilities (`.bg-*`) or set your own with the light/inverse classes above [for mad customization]({{ site.baseurl }}/components/navbar/#color-schemes).
+- Navbars now require a background declaration of some kind. Choose from our background utilities (`.bg-*`) or set your own with the light/inverse classes above [for mad customization]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/navbar/#color-schemes).
 - Given flexbox styles, navbars can now use flexbox utilities for easy alignment options.
 - `.navbar-toggle` is now `.navbar-toggler` and has different styles and inner markup (no more three `<span>`s).
 - Dropped the `.navbar-form` class entirely. It's no longer necessary; instead, just use `.form-inline` and apply margin utilities as necessary.
@@ -188,7 +188,7 @@ Dropped entirely for the new card component.
 - `.panel-default` removed and no replacement.
 - `.panel-group` removed and no replacement. `.card-group` is not a replacement, it is different.
 - `.panel-heading` to `.card-header`
-- `.panel-title` to `.card-title`. Depending on the desired look, you may also want to use [heading elements or classes]({{ site.baseurl }}/content/typography/#headings) (e.g. `<h3>`, `.h3`) or bold elements or classes (e.g. `<strong>`, `<b>`, [`.font-weight-bold`]({{ site.baseurl }}/utilities/typography/#font-weight-and-italics)). Note that `.card-title`, while similarly named, produces a different look than `.panel-title`.
+- `.panel-title` to `.card-title`. Depending on the desired look, you may also want to use [heading elements or classes]({{ site.baseurl }}/docs/{{ site.docs_version }}/content/typography/#headings) (e.g. `<h3>`, `.h3`) or bold elements or classes (e.g. `<strong>`, `<b>`, [`.font-weight-bold`]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/typography/#font-weight-and-italics)). Note that `.card-title`, while similarly named, produces a different look than `.panel-title`.
 - `.panel-body` to `.card-block`
 - `.panel-footer` to `.card-footer`
 - `.panel-primary` to `.card-primary` and `.card-inverse` (or use `.bg-primary` on `.card-header`)
diff --git a/docs/4.0/utilities/screenreaders.md b/docs/4.0/utilities/screenreaders.md
index 73743b3062..6284804a88 100644
--- a/docs/4.0/utilities/screenreaders.md
+++ b/docs/4.0/utilities/screenreaders.md
@@ -9,7 +9,7 @@ toc: true
 Hide an element to all devices **except screen readers** with `.sr-only`. Combine `.sr-only` with `.sr-only-focusable` to show the element again when it's focused (e.g. by a keyboard-only user). Can also be used as mixins.
 
 {% comment %}
-Necessary for following [accessibility best practices]({{ site.baseurl }}/getting-started/#accessibility).
+Necessary for following [accessibility best practices]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/#accessibility).
 {% endcomment %}
 
 {% highlight html %}