MediaWiki:Common.js
From WikiMSK
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/* Any JavaScript here will be loaded for all users on every page load. */
function docReady(fn) {
// see if DOM is already available
if (document.readyState === "complete" || document.readyState === "interactive") {
// call on next available tick
setTimeout(fn, 1);
} else {
document.addEventListener("DOMContentLoaded", fn);
}
}
if (window.innerWidth < 768 && document.querySelectorAll('h2').length > 4){ //only happen if window width is below value and if there are more than a certain number of h2 elements
docReady(collapsibleHeadings);
}
function collapsibleHeadings() {
// Get all the <h2> headings
var headings = document.querySelectorAll('.mw-parser-output h2');
Array.prototype.forEach.call(headings, function (heading) {
// Give each <h2> a toggle button child
// with the SVG plus/minus icon
heading.innerHTML = "<button aria-expanded=\"false\">\n ".concat(heading.innerHTML, "<svg aria-hidden=\"true\" focusable=\"false\" viewBox=\"0 0 10 10\"><rect class=\"vert\" height=\"8\" width=\"2\" y=\"1\" x=\"4\"/><rect height=\"2\" width=\"8\" y=\"4\" x=\"1\"/></svg></button>");
// Function to create a node list
// of the content between this <h2> and the next
var getContent = function getContent(elem) {
var elems = [];
while (elem.nextElementSibling && elem.nextElementSibling.tagName !== 'H2') {
elems.push(elem.nextElementSibling);
elem = elem.nextElementSibling;
} // Delete the old versions of the content nodes
elems.forEach(function (node) {
node.parentNode.removeChild(node);
});
return elems;
}; // Assign the contents to be expanded/collapsed (array)
var contents = getContent(heading); // Create a wrapper element for `contents` and hide it
var wrapper = document.createElement('div');
wrapper.hidden = true; // Add each element of `contents` to `wrapper`
contents.forEach(function (node) {
wrapper.appendChild(node);
}); // Add the wrapped content back into the DOM
// after the heading
heading.parentNode.insertBefore(wrapper, heading.nextElementSibling); // Assign the button
var btn = heading.querySelector('button');
btn.onclick = function () {
// Cast the state as a boolean
var expanded = btn.getAttribute('aria-expanded') === 'true' || false; // Switch the state
btn.setAttribute('aria-expanded', !expanded); // Switch the content's visibility
wrapper.hidden = expanded;
};
});
}