(1) jQuery is a JavaScript library created by American John Resig in 2006. It has developed from the initial version 1.0 to version 1.5.2, which was released in March 2011. As a JavaScript library, jQuery solves browser compatibility issues to a great extent and can run normally under IE 6.0, FF 2.0, Safari 3.0, Opera 9.0 and Chrome.
(2) Although jQuery is not the only JavaScript library, nor is it the earliest JavaScript library to appear, jQuery has the greatest influence. It continues to attract technology enthusiasts and experts from around the world to join its camp, and has almost Become the de facto standard in web development. Nowadays, even a JavaScript engineer who insists on not using jQuery must be able to understand jQuery code, otherwise he will not be able to communicate and cooperate with others conveniently. Therefore, jQuery has become a basic skill that front-end development practitioners must master.
(3) Logically speaking, jQuery is just a set of codes based on JavaScript. Its capabilities cannot exceed JavaScript, and even the implementation of certain functions still relies on JavaScript itself. Maybe many people take it for granted that learning to use JavaScript is enough, and jQuery should be left to those who are opportunistic. But it turns out that jQuery is not dispensable. Its emergence has completely liberated the creativity of developers, causing a large number of excellent network applications to emerge explosively, which is dizzying. It can be said to have created a prosperity that the original JavaScript could not achieve. situation.
(4) It is said that it is better to meet than to be famous. In order to experience the practical application of jQuery up close, readers can visit the following foreign websites. These dazzling websites hide a common feature, that is, they all use jQuery to create rich interactive elements and dynamic effects on the web page.
(5) jQuery is not only the best choice for beginners, it has been used in the world's largest organizations, enhancing interactivity for hundreds of millions of page visits every month. A large number of companies, including Amazon, IBM, Twitter, NBC, Best Buy, and Dell, use jQuery in their products.
(6) According to the development laws of the Web, there is no doubt that jQuery will evolve rapidly at the speed of the development of the Web. At least 3 major jQuery versions were released in 2011. The development community around jQuery continues to grow. Developers around the world have made important contributions to jQuery bug fixes, plug-in development, and related projects such as jQuery UI and QUnit. . The active jQuery technical community ensures that jQuery is a full-featured JavaScript library for any programmer who wants to engage in world-class JavaScript development.
(7) Summary: No matter which programming methodology or programming technology is used, for various web technologies such as Java/Spring, PHP, .NET, Ruby on Rails and Python/Django, jQuery is the best in the field of front-end development. Has outstanding features.
jquery实现多少秒后隐藏图片Apr 20, 2022 pm 05:33 PM实现方法：1、用“$("img").delay(毫秒数).fadeOut()”语句，delay()设置延迟秒数；2、用“setTimeout(function(){ $("img").hide(); },毫秒值);”语句，通过定时器来延迟。
axios与jquery的区别是什么Apr 20, 2022 pm 06:18 PM区别：1、axios是一个异步请求框架，用于封装底层的XMLHttpRequest，而jquery是一个JavaScript库，只是顺便封装了dom操作；2、axios是基于承诺对象的，可以用承诺对象中的方法，而jquery不基于承诺对象。
jquery怎么修改min-height样式Apr 20, 2022 pm 12:19 PM修改方法：1、用css()设置新样式，语法“$(元素).css("min-height","新值")”；2、用attr()，通过设置style属性来添加新样式，语法“$(元素).attr("style","min-height:新值")”。
jquery怎么在body中增加元素Apr 22, 2022 am 11:13 AM增加元素的方法：1、用append()，语法“$("body").append(新元素)”，可向body内部的末尾处增加元素；2、用prepend()，语法“$("body").prepend(新元素)”，可向body内部的开始处增加元素。
jquery怎么删除div内所有子元素Apr 21, 2022 pm 07:08 PM删除方法：1、用empty()，语法“$("div").empty();”，可删除所有子节点和内容；2、用children()和remove()，语法“$("div").children().remove();”，只删除子元素，不删除内容。
jquery中apply()方法怎么用Apr 24, 2022 pm 05:35 PM在jquery中，apply()方法用于改变this指向，使用另一个对象替换当前对象，是应用某一对象的一个方法，语法为“apply(thisobj,[argarray])”；参数argarray表示的是以数组的形式进行传递。
jquery怎么去掉只读属性Apr 20, 2022 pm 07:55 PM去掉方法：1、用“$(selector).removeAttr("readonly")”语句删除readonly属性；2、用“$(selector).attr("readonly",false)”将readonly属性的值设置为false。
jquery on()有几个参数Apr 21, 2022 am 11:29 AMon()方法有4个参数：1、第一个参数不可省略，规定要从被选元素添加的一个或多个事件或命名空间；2、第二个参数可省略，规定元素的事件处理程序；3、第三个参数可省略，规定传递到函数的额外数据；4、第四个参数可省略，规定当事件发生时运行的函数。
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