80 lines
3.1 KiB
JavaScript
80 lines
3.1 KiB
JavaScript
import { has } from 'lodash';
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import { isInIssuePage, isInMRPage, isInEpicPage } from './common_utils';
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/**
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* Checks whether an element's content exceeds the element's width.
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*
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* @param element DOM element to check
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*/
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export const hasHorizontalOverflow = (element) =>
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Boolean(element && element.scrollWidth > element.offsetWidth);
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export const addClassIfElementExists = (element, className) => {
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if (element) {
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element.classList.add(className);
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}
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};
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export const isInVueNoteablePage = () => isInIssuePage() || isInEpicPage() || isInMRPage();
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export const canScrollUp = ({ scrollTop }, margin = 0) => scrollTop > margin;
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export const canScrollDown = ({ scrollTop, offsetHeight, scrollHeight }, margin = 0) =>
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scrollTop + offsetHeight < scrollHeight - margin;
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export const toggleContainerClasses = (containerEl, classList) => {
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if (containerEl) {
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// eslint-disable-next-line array-callback-return
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Object.entries(classList).map(([key, value]) => {
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if (value) {
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containerEl.classList.add(key);
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} else {
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containerEl.classList.remove(key);
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}
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});
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}
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};
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/**
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* Return a object mapping element dataset names to booleans.
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*
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* This is useful for data- attributes whose presense represent
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* a truthiness, no matter the value of the attribute. The absense of the
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* attribute represents falsiness.
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*
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* This can be useful when Rails-provided boolean-like values are passed
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* directly to the HAML template, rather than cast to a string.
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*
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* @param {HTMLElement} element - The DOM element to inspect
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* @param {string[]} names - The dataset (i.e., camelCase) names to inspect
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* @returns {Object.<string, boolean>}
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*/
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export const parseBooleanDataAttributes = ({ dataset }, names) =>
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names.reduce((acc, name) => {
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acc[name] = has(dataset, name);
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return acc;
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}, {});
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/**
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* Returns whether or not the provided element is currently visible.
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* This function operates identically to jQuery's `:visible` pseudo-selector.
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* Documentation for this selector: https://api.jquery.com/visible-selector/
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* Implementation of this selector: https://github.com/jquery/jquery/blob/d0ce00cdfa680f1f0c38460bc51ea14079ae8b07/src/css/hiddenVisibleSelectors.js#L8
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* @param {HTMLElement} element The element to test
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* @returns {Boolean} `true` if the element is currently visible, otherwise false
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*/
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export const isElementVisible = (element) =>
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Boolean(element.offsetWidth || element.offsetHeight || element.getClientRects().length);
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/**
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* The opposite of `isElementVisible`.
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* Returns whether or not the provided element is currently hidden.
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* This function operates identically to jQuery's `:hidden` pseudo-selector.
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* Documentation for this selector: https://api.jquery.com/hidden-selector/
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* Implementation of this selector: https://github.com/jquery/jquery/blob/d0ce00cdfa680f1f0c38460bc51ea14079ae8b07/src/css/hiddenVisibleSelectors.js#L6
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* @param {HTMLElement} element The element to test
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* @returns {Boolean} `true` if the element is currently hidden, otherwise false
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*/
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export const isElementHidden = (element) => !isElementVisible(element);
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