70 lines
2.0 KiB
JavaScript
70 lines
2.0 KiB
JavaScript
function getComputedStyleProperty(el, prop) {
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const cs = el ? window.getComputedStyle(el) : null;
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return cs ? cs[prop] : null;
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}
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function isShown(el) {
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return getComputedStyleProperty(el, 'display') !== 'none';
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}
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function assertShown(el, expectShown) {
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if (window.config.runModeIsProd) return;
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// to help developers to catch display bugs, this assertion can be removed after next release cycle or if it has been proved that there is no bug.
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if (expectShown && !isShown(el)) {
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throw new Error('element is hidden but should be shown');
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} else if (!expectShown && isShown(el)) {
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throw new Error('element is shown but should be hidden');
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}
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}
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function elementsCall(el, func, ...args) {
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if (typeof el === 'string' || el instanceof String) {
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el = document.querySelectorAll(el);
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}
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if (el instanceof Node) {
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func(el, ...args);
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} else if (el.length !== undefined) {
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// this works for: NodeList, HTMLCollection, Array, jQuery
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for (const e of el) {
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func(e, ...args);
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}
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} else {
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throw new Error('invalid argument to be shown/hidden');
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}
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}
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/**
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* @param el string (selector), Node, NodeList, HTMLCollection, Array or jQuery
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* @param force force=true to show or force=false to hide, undefined to toggle
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*/
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function toggleShown(el, force) {
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if (force === true) {
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el.classList.remove('gt-hidden');
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assertShown(el, true);
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} else if (force === false) {
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el.classList.add('gt-hidden');
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assertShown(el, false);
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} else if (force === undefined) {
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const wasShown = window.config.runModeIsProd ? undefined : isShown(el);
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el.classList.toggle('gt-hidden');
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if (wasShown !== undefined) {
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assertShown(el, !wasShown);
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}
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} else {
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throw new Error('invalid force argument');
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}
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}
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export function showElem(el) {
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elementsCall(el, toggleShown, true);
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}
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export function hideElem(el) {
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elementsCall(el, toggleShown, false);
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}
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export function toggleElem(el, force) {
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elementsCall(el, toggleShown, force);
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}
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