


The application of windows.onload in Jqyery is equivalent to that of windows.onload in js_jquery
$(function(){//script})
Jquery (function(){//script})
Jquery(document).ready(function(){//script})
The above three codes perform the same action, which is convenient to write , so Jquery is more popular than other applications, but when used with other js libraries, especially when prototype.js is used at the same time, the $ method cannot be used because they also have this method. You can use the following method to avoid this Conflict:
jQuery(function($){//script})
They are all operations performed after the Dom is loaded, so they can be placed anywhere in the html, but some For example, the loading event method mentioned in the previous section
$("#btnShow").bind("click",function(event){$("#divInfo").show()});
$ ("#btnHid").bind("click",function(event){$("#divInfo").hide();});
$("#btnChange").bind("click", function(event){$("#divInfo").html("hello");});
This is executed during the loading process Yes, the relevant elements must be loaded before they can be executed. It will be much more flexible if you put them into the above code
Then this loading event can be placed anywhere...

The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.

JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

Python is more suitable for data science and machine learning, while JavaScript is more suitable for front-end and full-stack development. 1. Python is known for its concise syntax and rich library ecosystem, and is suitable for data analysis and web development. 2. JavaScript is the core of front-end development. Node.js supports server-side programming and is suitable for full-stack development.

JavaScript does not require installation because it is already built into modern browsers. You just need a text editor and a browser to get started. 1) In the browser environment, run it by embedding the HTML file through tags. 2) In the Node.js environment, after downloading and installing Node.js, run the JavaScript file through the command line.

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