42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
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/**
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* ReadMore
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*
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* Adds "read more" functionality to elements.
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*
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* Specifically, it looks for a trigger, by default ".js-read-more-trigger", and adds the class
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* "is-expanded" to the previous element in order to provide a click to expand functionality.
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*
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* This is useful for long text elements that you would like to truncate, especially for mobile.
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*
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* Example Markup
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* <div class="read-more-container">
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* <p>Some text that should be long enough to have to truncate within a specified container.</p>
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* <p>This text will not appear in the container, as only the first line can be truncated.</p>
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* <p>This should also not appear, if everything is working correctly!</p>
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* </div>
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* <button class="js-read-more-trigger">Read more</button>
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*
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*/
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export default function initReadMore(triggerSelector = '.js-read-more-trigger') {
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const triggerEls = document.querySelectorAll(triggerSelector);
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if (!triggerEls) return;
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triggerEls.forEach(triggerEl => {
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const targetEl = triggerEl.previousElementSibling;
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if (!targetEl) {
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return;
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}
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triggerEl.addEventListener(
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'click',
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e => {
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targetEl.classList.add('is-expanded');
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e.target.remove();
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},
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{ once: true },
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);
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});
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}
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