mutationobserver

Powerful DOM change observer MutationObserver and mutationobserver Before that, DOM3 provided the Mutation events event You can listen to attributes, text content, node insertion and deletion, child node changes, and other events. However, the W3C event is obsolete. Although some browsers still support this event, it is not recommended. MutationObserver currently

differs from events in that all listening operations and processing are performed asynchronously after the execution of other scripts, and so after the change is triggered, will become recorded in the array, unified callback, that is, when you use observer to listen to multiple DOM changes, and the number of DOM has changed, then Observer will change the changes in the array, waiting to end together, The corresponding callback function is then executed once from the array of changes.Mutation Ob

' Use strict '; let Mutationobserver=window. Mutationobserver||window. Webkitmutationobserver||window. Mozmutationobserver;let Observermutationsupport= !!Mutationobserver;if(OBSERVERMUTATIONSUPPORT) {let observer=NewMutationobserver ((mutations) ={Mutations.foreach (item)={Console.log (item); }); }); Const Options= { "Childlist":true,//changes to chi

1 varmutationobserver = window. Mutationobserver | | Window. Webkitmutationobserver | | Window. Mozmutationobserver;//Browser compatible2 varConfig = {attributes:true, Childlist:true}//Configuration Objects3$ ("DOM element to listen for"). each (function(){4 var_this = $ ( This);5 varObserver =NewMutationobserver (function(mutations) {//Constructor Callback6Mutations.foreach (function(record) {7 if(Record.type = = "Attributes") {//Liste

to indicate whether the callback function is being executed TimerFunc: used to trigger the execution of the callback function Next, let's take a look at the nextTickHandler () function. function nextTickHandler () { pending = false const copies = callbacks.slice(0) callbacks.length = 0 for (let i = 0; i This function is used to execute all the callback functions stored in callbacks. Next, assign the trigger method to timerFunc. First, determine whether the native supports promise. If ye

If the propertychange event is not supported, use this event or higher-end mutationobserver. VaR root = document.doc umentelement supportdomattrmodified = root. addeventlistener? (Function () {var FN, F = false, id = root. ID; fn = function () {root. removeeventlistener ('domattrmodified', FN, false); supportdomattrmodified = true; root. id = ID; // restore it}; root. addeventlistener ('domattrmodified', FN, false); root. id = 'mass'; // update attr

Yesterday I tried a series of suspicious module interception (http://www.bkjia.com/Article/201406/310932.html) experiments, although the final solution still has some compatibility problems, but the general idea has been clear: Static module: Use MutationObserver for scanning. Dynamic module: blocks path attributes through API hooks. When talking about Hook programs, you will think of API hooks in traditional applications and various plug-in Troja

Yesterday, I tried a series of suspicious module interception tests. Although the final scheme still has some compatibility problems, the general idea has been clarified: Static module: Use mutationobserver for scanning. Dynamic module: blocks path attributes through API hooks. When talking about Hook programs, you will think of API hooks in traditional applications and various plug-in Trojans. Of course, it may not be a system function. Any CPU i

For example, I have a P element, inside is some text, and then I have a button, click the button to replace the contents of the P element, then the P element binding what event can let it tell me that it has been modified, what is the implementation method? Reply content: For example, I have a P element, inside is some text, and then I have a button, click the button to replace the contents of the P element, then the P element binding what event can let it tell me that it has been modified,

For example, I have a p element, which contains some text, and then I have a button, click the button to replace the content in the p element, so what kind of events can be bound to element p to notify me that it has been modified? is there any implementation method? For example, I have a p element, which contains some text, and then I have a button, click the button to replace the content in the p element, so what kind of events can be bound to element p to notify me that it has been modified?

: PUBSUBJS.Dirty CheckIn data binding: the model to the end of the view, the force dirty check two-way binding example. In general, the framework will automatically enter the $degist phase, but in some special cases, the user can also be done manually by means of the framework exposure, as regular provides the $update method.MutationobserverThe exciting time has come: MutationObserverProvides developers with the ability to respond appropriately when a DOM tree changes in a range. A

Http://www.haorooms.com/post/js_xiancheng https://jakearchibald.com/2015/tasks-microtasks-queues-and-schedules/ Task Queue Main thread: Executing code that generates the function call stack. MACRO-TASK (macro task, new name: Task) includes: script (whole code), SetTimeout, SetInterval, setimmediate, I/O, UI rendering. Micro-task (micro task, new name: Jobs) includes: Process.nexttick, Promise, Object.observe (deprecated), Mutationob