BookStack/resources/js/services/dom.js
2020-07-25 00:20:58 +01:00

120 lines
3.4 KiB
JavaScript

/**
* Run the given callback against each element that matches the given selector.
* @param {String} selector
* @param {Function<Element>} callback
*/
export function forEach(selector, callback) {
const elements = document.querySelectorAll(selector);
for (let element of elements) {
callback(element);
}
}
/**
* Helper to listen to multiple DOM events
* @param {Element} listenerElement
* @param {Array<String>} events
* @param {Function<Event>} callback
*/
export function onEvents(listenerElement, events, callback) {
for (let eventName of events) {
listenerElement.addEventListener(eventName, callback);
}
}
/**
* Helper to run an action when an element is selected.
* A "select" is made to be accessible, So can be a click, space-press or enter-press.
* @param {HTMLElement|Array} elements
* @param {function} callback
*/
export function onSelect(elements, callback) {
if (!Array.isArray(elements)) {
elements = [elements];
}
for (const listenerElement of elements) {
listenerElement.addEventListener('click', callback);
listenerElement.addEventListener('keydown', (event) => {
if (event.key === 'Enter' || event.key === ' ') {
event.preventDefault();
callback(event);
}
});
}
}
/**
* Listen to enter press on the given element(s).
* @param {HTMLElement|Array} elements
* @param {function} callback
*/
export function onEnterPress(elements, callback) {
if (!Array.isArray(elements)) {
elements = [elements];
}
const listener = event => {
if (event.key === 'Enter') {
callback(event);
}
}
elements.forEach(e => e.addEventListener('keypress', listener));
}
/**
* Set a listener on an element for an event emitted by a child
* matching the given childSelector param.
* Used in a similar fashion to jQuery's $('listener').on('eventName', 'childSelector', callback)
* @param {Element} listenerElement
* @param {String} childSelector
* @param {String} eventName
* @param {Function} callback
*/
export function onChildEvent(listenerElement, childSelector, eventName, callback) {
listenerElement.addEventListener(eventName, function(event) {
const matchingChild = event.target.closest(childSelector);
if (matchingChild) {
callback.call(matchingChild, event, matchingChild);
}
});
}
/**
* Look for elements that match the given selector and contain the given text.
* Is case insensitive and returns the first result or null if nothing is found.
* @param {String} selector
* @param {String} text
* @returns {Element}
*/
export function findText(selector, text) {
const elements = document.querySelectorAll(selector);
text = text.toLowerCase();
for (let element of elements) {
if (element.textContent.toLowerCase().includes(text)) {
return element;
}
}
return null;
}
/**
* Show a loading indicator in the given element.
* This will effectively clear the element.
* @param {Element} element
*/
export function showLoading(element) {
element.innerHTML = `<div class="loading-container"><div></div><div></div><div></div></div>`;
}
/**
* Remove any loading indicators within the given element.
* @param {Element} element
*/
export function removeLoading(element) {
const loadingEls = element.querySelectorAll('.loading-container');
for (const el of loadingEls) {
el.remove();
}
}