


Detailed example of how to obtain link parameters in JavaScript_javascript skills
Using url to pass parameters should be familiar to everyone, for example:
http://www.softwhy.com/home.php?mod=space&do=home&view=all
Since parameters are passed, it is natural to obtain the passed parameters. Of course, there are many ways to obtain parameters. Here is one of them, and I will share it with you. I hope it can bring you some help. Code As follows:
var url="http://www.softwhy.com/home.php?mod=space&do=home&view=all"; if(url.indexOf("?")!=-1) { var str=url.substr(url.indexOf("?")+1); strs=str.split("&"); for(i=0;i<strs.length;i++) { alert(strs.length); alert(strs[i].split("=")[0]); alert(strs[i].split("=")[1]); alert(strs[i].split("=")[0],'=',strs[i].split("=")[1],'<br>'); } }
In the above link:
The length of 1.strs.length is 3.
2.strs[0].split("=")[0] is mod, strs[0].split("=")[1] is space.
3.strs[1].split("=")[0] is do, strs[1].split("=")[1] is home.
The following are analogous.
Let me share with you 3 JS code examples for obtaining address bar parameters
Sometimes, we need to get the address bar parameter value of a static page. Using JS is the easiest way. Here are three function codes that use javaScript to get the address bar parameter. They are relatively easy to use. Let’s share them with you one by one. Share code:
JS gets the address bar string parameters, method one:
<script type="text/javascript"> Request = { QueryString : function(item){ var svalue = location.search.match(new RegExp("[\?\&]" + item + "=([^\&]*)(\&?)","i")); return svalue ? svalue[] : svalue; } } alert(Request.QueryString("id")); </script>
JS gets the address bar string parameters, method two:
<script type="text/javascript"> var URLParams = new Array(); var aParams = document.location.search.substr().split('&'); for (i=; i < aParams.length i++){ var aParam = aParams.split('='); URLParams[aParam[]] = aParam[]; } //获取传过来的name参数: name=URLParams["name"]; </script>
JS gets the address bar string parameters, method three:
<script type="text/javascript"> function getvalue(name) { var str=window.location.search; if (str.indexOf(name)!=-) { var pos_start=str.indexOf(name)+name.length+; var pos_end=str.indexOf("&",pos_start); if (pos_end==-) { return str.substring(pos_start); } else { return str.substring(pos_start,pos_end) } } else { return "没有这个name值"; } } var strName=prompt("请输入您所要值的名字"); alert(getvalue(strName)); </script>
These three methods use different cores, please choose according to your own program requirements.

JavaScript runs in browsers and Node.js environments and relies on the JavaScript engine to parse and execute code. 1) Generate abstract syntax tree (AST) in the parsing stage; 2) convert AST into bytecode or machine code in the compilation stage; 3) execute the compiled code in the execution stage.

The future trends of Python and JavaScript include: 1. Python will consolidate its position in the fields of scientific computing and AI, 2. JavaScript will promote the development of web technology, 3. Cross-platform development will become a hot topic, and 4. Performance optimization will be the focus. Both will continue to expand application scenarios in their respective fields and make more breakthroughs in performance.

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.


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