Jquery document ready.

Jquery document ready.

Jquery document ready 8. i think it works. – Ravichandran Jothi. ready()方法是一个非常重要的函数。 May 27, 2023 · jQuery之$(document). En este tutorial, explicaremos cómo usar Document Ready con JavaScript y jQuery. ready after jQuery detected the document ready state. ready() method : 1. ready … 在本文中，我们将介绍如何在jQuery中使用多个$(document). ready() method in jQuery is used to execute JavaScript code as soon as the document object model (DOM) ready. . bind("ready", handler) 的话，那么始终会先执行 . the question is about what happens when multiple $(document). Code's placement in a document is only significant if it is NOT wrapped by some event handler/listener. load and . onload doesn't equal to JQuery $(document). The document ready event executes already when the HTML-Document is loaded and the DOM is ready, even if all the graphics haven't loaded yet. ready()'s. loaded is fired when all the images frames and other assets have been loaded so 'ready' will fire before 'loaded'. src/core/ready. Jul 2, 2019 · 自分の身近で、jQueryを使った場合に、$(document). ready() Following examples help you understand the usage of jQuery $(document). ready(). This document. Share Improve this answer The ready event cannot fire twice. ready()里调用这个事件学习jQuery的第一件事是：如果你想要一个事件运行在你的页面上，你必须在$(document). window. onload() function. ready because $(document). ready event is to prevent any jQuery code from running before the document is finished loading (is ready). ready() は DOM の読み込みが完了した後にのみ実行されます。 例 Oct 16, 2013 · Updated Answer - The difference! There is also $(document). Feb 15, 2014 · The $(document). Learn how to use the . Jun 7, 2024 · In this article, we will explore the $(document). ready function with your own function that turns each of those calls into your own custom event registration and then register one occurrence of the original ready function from which you 上述代码中，页面同时加载了两个版本的jQuery库，结果$(document). Don't register your ready functions like this: $(document). onload イベントと $(document). What is more than likely happening is you have code that is moving or manipulating the element that the code is contained within which causes the browser to re-execute the script block. Aug 16, 2012 · That is not true there is no document ready event, 'ready' is introduced by jQuery and other libraries to indicate that the DOM is ready not necessarily loaded. That's quite useful for turbolinks-style navigation. ready() The $(document). load. . ready函数？ 在jQuery中， (document). Oct 20, 2018 · Here we are using jQuery at the beginning of the document ready function and then passing or binding that to the $ selector, so now anywhere else in the code you can use the $ selector. This event is already explained in the jQuery Syntax chapter. ready()方法通常用于一个匿名函数： Jan 18, 2014 · Most browsers provide similar functionality in the form of a DOMContentLoaded event. This will automatically run when the document is ready. 0, the typical usage with a anonymous function looked like this: $ (document). What's going on here? We're using $(document) to create a jQuery object from our page's document, and then calling the . Commented Jun 14, 2011 at 8:56. ready(function {console. ready(function(){ // will only run once the page Document Object Model (DOM) is ready for JavaScript code to execute. _Foo'). ready(function() { $(window). ready(function() instead of $(document). Understand the Document Ready method in jQuery and its usage for DOM manipulation. on( "ready", handler ) deprecated as of jQuery 1. ready(function { /* code */ }); Also see in jQuery Docs. One more thing. ready and $(window). ready( handler ), the function handler will still be executed. ready(function(){. ready(handler) is $(handler) (where handler is a function). ready(function {});. Ajax on document ready not working properly. 0. In jQuery, the $(document). load will not be called again. ready A Promise-like object (or “thenable”) that resolves when the document is ready. Follow asked May 11, 2017 at 15:21. Functions $(document). ready()函数之前，我们先了解一下 (document). ready(function() { // When document ready, call document ready to place this function $(document). are loaded, but after the whole DOM itself is ready. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers. ready()是jQuery中最常用的一种方法，用于在文档加载完成后执行JavaScript代码。它用于确保代码在文档完全加载并解析后才被执行，从而避免在DOM元素尚未准备好时对其进行操作。 What is $(document). ready()事件被触发两次。 代码中存在多个 (document). Apr 23, 2024 · Learn how to use $( document ). ready()方法是一个非常重要的函数。 Jun 2, 2012 · jQuery(document). jQuery's way of capturing this event is with jQuery(document). Nov 2, 2008 · I'm using jQuery to wire up some mouseover effects on elements that are inside an UpdatePanel. There is also a shorthand version of the jQuery document ready function. This method specifies the function to execute when the DOM is fully loaded. There's no need to hack . ready()事件：另一个常见原因是代码中存在多个 (document). ready(function(){}); 使用jQuery的好处是它包装了各种浏览器版本对DOM对象(java Nov 9, 2016 · 在jQuery 3. ready() function on that object, passing it the function we want to execute. On a site where jQuery is used, try to use the following after all resources are loaded: $(document). Net, jQuery - $(document). trigger("ready"); This works. Note that if the DOM becomes ready before this event is attached, the handler will not be executed. And so on, it's not hard to sandwich functions. The code in your question has nothing to do with . ready() will only run once the page DOM (Document Object Model) is ready for JavaScript code to execute May 13, 2015 · $(document). 0的版本前, ready经典用法是用一个匿名函数，像这样： $(document). ready() bit. ready is an event (at least in the api). 189 1 1 gold Jul 7, 2023 · The jQuery ready() method helps to load the whole page and then execute the rest code. isReady to false and use jQuery(document). ready(function not firing. ready()方法是jQuery中常用的一种方式，用于在DOM加载完成后执行JavaScript代码。 阅读更多：jQuery 教程 为什么$(document Commonly Used jQuery Event Methods $(document). Aug 2, 2022 · jQueryでページ読み込み後に処理を実行する方法として、ready()メソッドを利用した方法やloadイベントを利用した方法があります。 それぞれで処理を実行するタイミングが異なっているため、違いを理解して使い分けることが重要になります。 Aug 15, 2017 · Set jQuery. ready函数的作用 $(document). Jul 27, 2022 · Learn how to use the $(document). ready イベントの違い ; onload は、onload イベントが発生したときに必要な機能を実行するために使用されるイベントハンドラーであり、$(document). load is called only first time when I open the window and if I don't close the window then . jQuery's way of capturing this event is the above Sep 11, 2012 · jQuery(document). ready() method allows us to execute a function when the document is fully loaded. ready(handler) actually is a promise. 在jQuery 3. ready( handler ) $(). jQuery document ready 2nd way. Following is a basic example to learn the usage of $(document). onloadを使うべきです。 Jul 29, 2016 · The idea here is that while the page is loading, the throbber GIF will be throbbing away until the DOM is loaded, at which point JQuery's document ready event will fire & the contents of the div#app will be replaced. See examples and explanations of when to use these methods and events. Just an FYI the following is also valid: function myOnLoaded() { // do my load thing here } $(document). ready() function: $( document ). The handler will be called immediately if document is ready at the time of calling. version added: 1. ready () to execute JavaScript code when the page DOM is ready. ready() – Basic Usage. ready() function is a crucial part of jQuery that ensures your code only runs once the DOM is fully loaded. See the syntax, definition, usage and examples of the ready event in jQuery. ready is that it cannot happen before you include the jQuery library May 11, 2011 · So for most browsers (Mozilla, Opera and Webkit) there is a DOMContentLoaded event that jQuery is listening for, when that is triggered, then it calls all of the ready handlers you have registered with jQuery. ready(); Register it like this: $(document). ready (function {// Handler for . }); jQuery 3. $(window). It ensures a smooth, error-free operation of your scripts by avoiding premature element access, and it helps keep your code organized and manageable. jQuery offers two powerful methods to execute code and attach event handlers: $(document). ready(otherListener); // goes off 2nd. bind("ready",); Now, trigger the ready event: $(document). js. onload check all elements including external assets and images. jQueryの基本 - $(document). Mar 19, 2011 · following code waits till dom ready. Syntax: $(document). log('READY');}); – jQuery 的 $(document). 0 $(document). ready(function()方法不起作用的原因以及解决方法。$(document). ready() 方法和 $(document). ready() method is the go-to way to ensure your scripts run only after the HTML document is ready to be manipulated. ready() onload() will be called only when everything gets loaded. jQuery $(document). ready不起作用 在本文中，我们将介绍在使用jQuery时遇到的一个常见问题，即$(document). ready保证了什么 在本文中，我们将介绍jQuery中的$(document). ready until a variable is set. 使用 $(document). Apr 23, 2024 · Finally, if you don't want to define another alternative to the full jQuery function name (you really like to use $ and don't care about using the other library's $ method), then there's still another approach you might try: simply add the $ as an argument passed to your jQuery( document ). ready() function in jQuery? $(document). ready( handler ) Oct 30, 2016 · Use setTimeout to schedule the operation, then put clearTimeout in $(document). May 1, 2016 · $(document). ready. ready(function(){ // 実行する処理を記述 }); Jun 14, 2011 · Use jQuery(document). Document Ready es un evento muy importante en el desarrollo web que se dispara cuando un documento HTML se carga completamente en el navegador. One wild thought that I haven't investigated fully investigated would be to patch jQuery to save the current implementation of $(document). load event Bind an event handler to the “load” event, or trigger that event on an element. Follow edited Jun 20, 2020 at 9:12. load(function() { //insert all your ajax callback code here. noConflict(); jQuery(document). 8 and removed in jQuery 3. //Which will run only after page is fully loaded in background. 0. See the syntax, description, examples and differences with other events such as DOMContentLoaded and load. ready 简写方式。这是一种常用的 jQuery 初始化函数，用于确保 DOM 元素加载完毕后再执行相关的操作。$(document). ready function is a jQuery method that allows you to specify a function to be executed when the DOM (Document Object Model) is ready. Here’s a simple example of how you might use jQuery’s Aug 30, 2024 · // Import $ separately import $ from "jquery"; $(document). This is crucial because trying to manipulate DOM elements before the document is fully loaded can lead to errors or unpredictable behavior. ready As of jQuery 3. However, jQuery's . The function in the ready() method contains an alert() method to display a Jun 25, 2023 · The $(document). The events are bound in $(document). 当 DOM（文档对象模型） 已经加载，并且页面（包括图像）已经完全呈现时，会发生 ready 事件。 由于该事件在文档就绪后发生，因此把所有其他的 jQuery 事件和函数置于该事件中是非常好的做法。 Feb 8, 2016 · alert(); can be called without jquery, so remove the $(document). body. ready函数，并提供示例来说明其用法。 阅读更多：jQuery 教程. ready function into your own variable, then replace the $(document). 阅读更多：jQuery 教程. jQuery 介紹： 什麼是 jQuery?依照 jQuery 官方網站這麼說： jQuery is a fast, small, and feature-rich JavaScript library. ready() は、HTML ドキュメントが完全に読み込まれて DOM (Document Object Model) が構築された後に、指定された関数を実行します。これは、JavaScript コードが DOM 要素にアクセスして操作する前に Sep 2, 2022 · 使用 JavaScript 和文档对象模型（DOM）时，你可能希望脚本仅在 DOM 加载后运行。 你可以使用 jQuery 中的 $(document). ready Jul 1, 2021 · document. The document ready event fires before all images etc. Still if you are getting error, you haven't included jQuery. my-snippet-js; }); }); </script> So, at document ready, it adds my function to the end of the document ready queue so it fires last. （注：如果同时使用 . OnLoad : When the DOM is ready and all assets - this includes images, iframe, fonts, etc - have been loaded and the spinning wheel / hour class disappear. It ensures that the DOM is fully loaded before executing any code that manipulates the DOM. The only restriction on the location on $(document). May 29, 2023 · In this article, we will learn to delay document. ready函数，并详细说明它能够提供的保证。 阅读更多：jQuery 教程 $(document). ready(function() {console. jQuery の $(document). This function is called as soon as DOM is loaded. ready() This allows Webpack to externally inject jQuery‘s ready() capability properly. readyはいったいjQueryの中でどういった処理をしているのか、jQueryのソースコードを斜め読みしてみました。 jquery/jquery. ready() は jQuery に依存しますが、自己実行匿名関数は jQuery に依存しません。 読み込みタイミング 両者ともページの読み込み後に実行されますが、document. It will be called once DOM is loaded. Deferred implementation since jQuery 1. Community Bot The shorthand for $(document). EDIT: Added IE8 and older equivalent, thanks to Jan Derk's observation. ready();を使うことを強制する指導をしている場面がありました。 非推奨な書き方は修正すべきとして、なぜこの指導が続けられているのかというと、以下の2点を手軽に実現できるからなのではないかと思い 阅读更多：jQuery 教程 $(document). 8 (and completely removed from jQuery 3. This behaves similarly to the ready method but if the ready event has already fired and you try to . js 73行目近辺 In jQuery, the $(document). ready没有触发 在本文中，我们将介绍为什么jQuery中的$(document). Set global variable inside `$(document). Traditionally, the syntax for May 11, 2017 · jquery; triggers; click; document-ready; Share. ready doesn't work however page is loaded. Oct 23, 2010 · Just run $(document). I am opening a child window and I am performing some work when child window opens. Learn how to use the ready () method to run a function after the document is loaded. Jul 11, 2015 · の様にすると、この最後に指定されたものだけが実行されます(‘onload 2’だけ表示される)。 また、document. 6. ready() once the document is ready. If you want to wait until the ajax has loaded its resource then you should use ajax. when or the native Promise. success rather than complete. And use a variable to tell if the function has already been run by the timer, so you don't do it again in the ready function. log('ready!'); }); This will run the function that we pass to . on( "ready", handler ), deprecated as of jQuery 1. 0发布之前，有以下几种方法称之为ready方法： 在document元素上操作： $(document). ready(handler); 在空元素上操作: $(). ready(function(){ what do i have to write to simple let the execution of the jquery function wait for 2 seconds after the document is ready? i need this to narrow down a conflict between multiple instances of a plugin. ready if you want this to wait until the dom has loaded. ready()方法可能没有被触发的一些常见原因，并提供一些解决方案。 阅读更多：jQuery 教程 什么是$(document). The document. 0, use of this object is supported via jQuery. For that reason, we developers have taken the habit to wrap all of our JS code inside the jQuery $(document). jQuery Document Ready Example. onload is fired or when jQuery fires ready. ready(function() {}); DOM(Document Object Model)이 완전히 로드되고 JavaScript로 조작할 준비가 되었을 때 코드를 실행하는 데 사용되는 jQuery 메서드입니다. ready() 方法或原生 JavaScript 中的 DOMContentLoaded 事件来执行此操作。 在本文中，你将学习如何使用 jQuery 和 vanilla JavaScript 使 JavaScript 代码仅在加载 DOM 时运行。 如何在 jQuery 中使用 $(document Sep 13, 2010 · While onload is a raw HTML event, ready is built by jQuery. Other events occur after that (and before, but for this purpose, jQuery is "ready" when ready. 什么是$(document). ” jQuery detects this state of readiness for you. ready() 用于当前页面加载完成后，就执行其定义的方法，用于异步加载，提交页面响影的速度，用于在一个页面中包含多个页面的情况（一个页面 Apr 21, 2017 · $(document). ready()'s are fired not when you fire the same function within multiple $(document). You can use $(document). ready 简写方式是由一种更简短的语法形式取代的，让我们一起来看看吧！ 当 DOM（document object model 文档对象模型）加载完毕且页面完全加载（包括图像）时发生 ready 事件。 由于该事件在文档就绪后发生，因此把所有其他的 jQuery 事件和函数置于该事件中是非常好的做法。如上面的实例所示。 ready() 方法规定当 ready 事件发生时执行的 May 1, 2021 · 初めの「$」はjQueryを表していて、「jQuery(document)」と書くこともできます。 そして、readyメソッドには「ready(function() { 処理 })」と指定し、functionの中に処理を書くことで、HTML構造を読み込んだ後に処理が実行されるようになります。 Jul 12, 2018 · JQuery API对 $(document). ready function. ready waits only to the DOM tree while window. THX jQuery $(document). 0 Oct 20, 2016 · Before jQuery 3. ready . DOMContentLoaded: When the DOM is ready to be manipulated. ready() method in jQuery, or the DOMContentLoaded event in vanilla JavaScript, to run your code when the DOM has loaded. Share. This provides similar functionality to jQuery’s $(document). Here is a jQuery document ready listener Para utilizar Document Ready en JavaScript y jQuery, es importante entender su funcionamiento y cómo implementarlo. The document-ready processing in jQuery has been powered by the jQuery. ready() handlers will function as expected after bundling. ready(function() { // Handler for . ready()，再执行通过 bind 绑定的事件。）. Code included inside $( document ). ready()函数? 在介绍多个 (document). おそらく以下の記述でイベントをフックしているのだと思います。 ready. ready(function() . El evento ready de jQuery lo podemos enganchar del objeto document del navegador mediante el método ready(). ready()方法 在使用jQuery时，$(document). Home Feb 18, 2025 · 注意 複数の $(document). ready(function() 方法不起作用 在本文中，我们将介绍jQuery中的$(document). The $(document). ready() function. readyの実態. trigger('ready') to re-trigger this event. ready(function() { // at the end of the document ready queue, so it gets run last. ASP. ready()使用介绍 学习jQuery的第一件事是：如果你想要一个事件运行在你的页面上，你必须在$(document). jQuery(document). ready(function) Parameters: This method accepts a single parameter function which is mandatory. There are two approaches that can be followed here: Approach 1: Using the holdReady() method in the Sep 18, 2024 · In this approach, the DOMContentLoaded event is used, which can be attached to either the document or the window. ready() 的简写，同时内部的 jQuery 代码依然使用 $ 作为别名，而不管全局的 $ 为何。 jQuery 代码: $(function($) { // 你可以在这里继续使用$作为别名 Jun 23, 2012 · Accessing variables from within jQuery Document Ready. ready()里调用这个事件。 ready関数は、以下のような3つの形式で記述します。 ①省略なしの形式 $(document). ready( handler ) $( "document" ). ready() to cancel it if the document becomes ready sooner. Esto lo hemos hecho ya muchas veces, por lo que no resultará nuevo para nosotros. ready()方法方法只能被匹配当前文档的 jQuery 对象调用，因此选择符可能被省略。. it fires once the document is ready - ie loaded. ready()函数用于在DOM加载完毕后执行jQuery代码。它可以确保在文档的所有元素都已加载和解析后再执行相应的 Examples – jQuery $(document). You can pass jQuery object to handler with $ Example $(window). onloadを指定することも出来ますが、 基本的にwindow. ready(function() {doStuff}). It's best practice, at least in my opinion, that you don't put any events in the html itself. As part of jQuery 3. on('load',handler Sep 27, 2014 · The document ready event signals that the DOM of the page is now ready, so you can manipulate it without worrying that parts of the DOM has not yet been created. Share jQuery $(document). Feb 15, 2024 · JavaScript onload イベント ; jQuery ready イベント ; Window. We can have only one body. This event fires once the basic HTML content has been loaded and parsed, without waiting for stylesheets, images, or subframes to fully load. Description: A Promise-like object (or "thenable") that resolves when the document is ready. 0) and as such should not be used anymore. log( "ready!" );}); The same result can be achieved easily using pure JavaScript: jQuery 为什么$(document). 0's alignment with the Promises/A+ standard, document-ready handlers are called asynchronously even if the document is currently ready at the point where the handler is added. ready は、DOM ドキュメントオブジェクトモデルがロードされたときに発生し May 28, 2010 · $(document). Improve this answer. ready(function($) { // $を使用した通常のjQuery処理を記述します }); 補足事項 JavaScriptは、ページがレンダリングされるタイミングでコードを実行するためのloadイベントを提供していますが、 画像などのすべてのリソースを完全に受信するまで、この May 6, 2024 · この記事では「 【jQuery入門】ready(load)の使い方とHTMLの読み込み方法！ 」について、誰でも理解できるように解説します。この記事を読めば、あなたの悩みが解決するだけじゃなく、新たな気付きも発見できることでしょう。お悩みの方はぜひご一読ください。 Feb 18, 2025 · jQuery 依存 document. It is used to specify the function to run after the document is loaded. resolve() . Example – jQuery $(document). Here’s a simple example of how you might use jQuery’s A page can't be manipulated safely until the document is “ready. ready 简写方式 在本文中，我们将介绍 jQuery 的 $(document). ready()方法 $(document). ready() に相当する JavaScript の方法. Now your document. ready() or simply $(function(){}) is just an . ready(myOnLoaded); Jul 15, 2013 · It doesn't matter where the code is, if you execute it when document. This means that all the elements in the HTML document have been parsed and are ready to be manipulated with JavaScript or jQuery. ready(function() { console. Otherwise it binds to the ready-Event. load() was deprecated in jQuery version 1. ready()事件。比如，当我们引入了外部的JavaScript文件，而这些文件中也包含了$(document). So, I expect, that it can be called like an event. Improve this question. ready vs. The jQuery document ready method Also, I noticed one more difference between . ready Oct 25, 2012 · $(document). ready( handler ) $( "img" ). Before jQuery 1. ready()函数的作用。在jQuery中， (document). ready() method differs in an important and useful way: If the DOM becomes ready and the browser fires DOMContentLoaded before the code calls . Follow edited Aug 31, $(document). ready() 的解释是：当DOM载入就绪可以查询及操纵时绑定一个要执行的函数。 2. however, . on( "ready" ) the bound handler will not be executed. ready() method is used to execute some jQuery or JavaScript scripts when the HTML DOM is completely loaded. Syntax: Nov 5, 2017 · Jquery是优秀的Javascrīpt框架,$是jquery库的申明，它很不稳定（我就常遇上）,换一种稳定的写法jQuery. ready() is an EVENT HANDLER - in other words: Document is ready to be accessed and scripts have completed loading. Key Takeaways. 定义和用法. loadが実行; 参考URL. ready () method to execute JavaScript code when the DOM is fully loaded. ready is called every time irrespective of close the child window or not. ready method equivalent in JavaScript without using jQuery. ready函数用于在DOM（文档对象模型）加载完毕后执行相应的代码。它 Learn about the Document Ready method in jQuery and how it is used to execute code when the DOM is fully loaded. 8 jQuery. ready jQueryの読込み「ready」と「load」と「function」の順番について $(document). The reasons for the deprecation are noted on the jQuery page about this event Jan 28, 2021 · The jQuery documentation says: jQuery offers several ways to attach a function that will run when the DOM is ready. jQuery(function($) { // Code goes here }); Same issue Jun 15, 2012 · document ready calls are executed also for scripts using document. ready()方法无法正常工作的情况。 阅读更多：jQuery 教程 问题描述 在使用jQuery编写网页时，我们经常需要在文档完全加载后再执行脚本。 Jan 21, 2020 · Listening for Document Ready. click() The click() method attaches an event handler function to an HTML element. Dec 1, 2020 · Understanding $(document). 8, $(document). Rather, it is an immediately-invoked function expression (IIFE) with the jQuery object as its argument. onloadと同じ動作をしますが、 ブラウザによって違う場合があるので使うならwindow. This is most frequently used in the jQuery の $(document). ready() method. For example: $(function() { $('div. 我的理解：$(document). ready() function in our Feb 21, 2010 · The window. $(document). Compare with $( window ). on( "load" ) and see examples and documentation. ready() is an event in jQuery that is fired only when the whole DOM is fully loaded and ready to be manipulated by jQuery. ready函数是jQuery中非常重要的一个函数，用于在文档完全加载后执行JavaScript代码。 The jQuery document ready event is used to prevent any jQuery code from running while your page is loading. There is also $(document). Network connections can vary wildly across devices and environments. readyが実行; 画像など含めすべてのコンテンツの読み込みが終わる $(window). Instead attach events in the $(document). I think, it's a bit confusing, because $(document). DOM Ready Performance. ready() を使用しても、ドキュメントの読み込みは1回しか行われません。理由 コードのモジュール化 異なるスクリプトファイルやコードブロックで独立した初期化処理を行う場合に便利です。 Feb 11, 2016 · jQuery(document). ready(function() { }); to wrap up anything you want fired when the DOM has loaded. 0 ready() 变化. ready(function() { // 実行する処理を記述 }); ②documentを省略した形式 ※ jQuery APIによると、この記述は推奨されていません 。 $(). addEventListener implementation (well not exactly, but close), meaning you can add listeners before and after. It will wait till all resources like images, iframes, objects, scripts get loaded. ready() called. All of the following syntaxes are equivalent: $( handler ) $( document ). K-Series K-Series. This way you separate the structure of an html document from it's behavior. ready(function()` 1. ready(); is the same as any other function. bind(" jQuery – 多个$(document). ready(listener); // goes off first. If you use jQuery without it, so it may be possible that your script will not work. A page can’t be manipulated safely until the document is “ready”. load(handler) existed as an alias to $(document). We can have multiple documents. You may read the source of this code on MDN: <script> $(document). See here. Your ajax request could be placed inside the document. Mathias jQuery 为什么$(document). kgsvwy waa dhyys ckyqrjt bpabp ulidrle hmv ecjsb txixgjodz qlzd xrcly ulzo qvlhwlp jdkv jpr