gitlab-org--gitlab-foss/app/assets/javascripts/behaviors/toggler_behavior.js

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JavaScript
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// Toggle button. Show/hide content inside parent container.
// Button does not change visibility. If button has icon - it changes chevron style.
//
// %div.js-toggle-container
// %button.js-toggle-button
// %div.js-toggle-content
//
$(() => {
function toggleContainer(container, toggleState) {
const $container = $(container);
$container
.find('.js-toggle-button .fa')
.toggleClass('fa-chevron-up', toggleState)
.toggleClass('fa-chevron-down', toggleState !== undefined ? !toggleState : undefined);
$container
.find('.js-toggle-content')
.toggle(toggleState);
}
$('body').on('click', '.js-toggle-button', function toggleButton(e) {
e.target.classList.toggle('open');
toggleContainer($(this).closest('.js-toggle-container'));
const targetTag = e.currentTarget.tagName.toLowerCase();
if (targetTag === 'a' || targetTag === 'button') {
e.preventDefault();
}
});
// If we're accessing a permalink, ensure it is not inside a
// closed js-toggle-container!
const hash = window.gl.utils.getLocationHash();
const anchor = hash && document.getElementById(hash);
const container = anchor && $(anchor).closest('.js-toggle-container');
if (container) {
toggleContainer(container, true);
anchor.scrollIntoView();
}
});