Waits for selectors to match newly added nodes
Script này sẽ không được không được cài đặt trực tiếp. Nó là một thư viện cho các script khác để bao gồm các chỉ thị meta
// @require https://update.greasyfork.org/scripts/432418/1192077/Wait%20For%20Selector.js
// ==UserScript==
// @name Wait For Selector
// @namespace http://tampermonkey.net/
// @description Waits for elements
// @author Kumirei
// @include *community.wanikani.com*
// @grant none
// ==/UserScript==
;(function (wfs) {
let version = '1.0.1'
// Create new observer on body to monitor all DOM changes
let observer = new MutationObserver(mutationHandler)
observer.observe(document.getElementsByTagName('html')[0], { childList: true, subtree: true })
// Interface for interacting with the library
let interface = {
version,
observer: observer,
wait: waitForSelector,
unwait: unwaitID,
waits: {},
waitsByID: {},
nextID: 0,
}
// Start
installInterface()
// Creates a new entry to search for whenever a new element is added to the DOM
function waitForSelector(selector, callback) {
if (!interface.waits[selector]) interface.waits[selector] = {}
interface.waits[selector][interface.nextID] = callback
interface.waitsByID[interface.nextID] = selector
search(selector, true)
return interface.nextID++
}
// Deletes a previously registered selector
function unwaitID(ID) {
delete interface.waits[interface.waitsByID[ID]][ID]
delete interface.waitsByID[ID]
}
// Makes sure that the public interface is the newest version and the same as the local one
function installInterface() {
if (!wfs) window.wfs = interface
else if (wfs.version < interface.version) {
wfs.version = interface.version
wfs.observer.disconnect()
wfs.observer = interface.observer
wfs.wait = interface.wait
wfs.unwait = interface.unwait
}
interface = wfs || interface
}
// Waits until there has been more than 300 ms between mutations and then checks for new elements
let lastMutationDate = 0 // Epoch of last mutation event
let timeoutID = 0
function mutationHandler(mutations) {
let duration = Date.now() - lastMutationDate
lastMutationDate = Date.now()
if (duration < 300) {
clearTimeout(timeoutID)
timeoutID = setTimeout(() => {
for (let selector in interface.waits) search(selector)
}, 300)
}
}
// Searches for the selector and calls the callback on the found elements
function search(selector, all = false) {
document.querySelectorAll(selector).forEach((e, i) => {
let callbacks = Object.values(interface.waits[selector])
if (all || !e.WFSFound || e.WFSFound == lastMutationDate) {
for (let callback of callbacks) callback(e)
e.WFSFound = lastMutationDate
}
})
}
})(window.wfs)