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Discussion on the problem of converting front-end js objects into java objects in the background

During the recent project development process, I encountered the problem of converting the front-end js objects into java objects in the background many times. Record the method for later use. To put it simply, use the JSON.stringify() method to convert j

2025-03-01
Summary of usage of JS Replace to replace all characters

script language="javascript">var r= "1/n2/n3/n";//Replace the letter /n with a semicolon alert(r.replace("/n",";")); Result: 1; 2/n3/n only replaces the first one</script>

2025-03-01
Pop up the simplest js code of modal mask layer

Suppose we have a container container as follows: Copy the code as follows:<style type=”text/css”> #container{width:auto;height:auto; overflow:hidden;} /*这里的overfl

2025-03-01
js trigger select onchange event code

The onchange event of select or text needs to be manually changed (through keyboard input) to trigger. If you assign a value to select or text in js, the onchang event cannot be triggered. For example, after the page loads, an onChange needs to be trigger

2025-03-01
JavaScript implements mouse drag element instance code

1. Preface: The purpose of implementing the mouse drag element is to drag many small dots on a page for fixed positioning, and then copy HTML and paste it in the development code of the page. This is a function that implements a lot of All of them were no

2025-03-01
Analysis and solution of Javascript floating point operation accuracy problems

Analyzing JavaScript There is only one number type Number, Number, and all numbers in Javascript are represented in the IEEE-754 standard format. The precision problem of floating-point numbers is not unique to JavaScript, because some decimals represent

2025-03-01
JS saves method name and executes method example according to variable

Copy the code as follows: function a(){ alert("fun a()"); } function b(){ alert("fun b()"); } var methodName = ""; //method1 methodName

2025-03-01
JavaScript operation CSS attribute

Copy code code as follows: Var GetStyle = Function (Elementid, Attribute) {Obj = Document.GetelementByid (Elementid); // In front is the standard RETURN O.

2025-03-01
When the mouse passes through TR, changes TR's current background color

The example is as follows: Copy code code as follows:<html><head><meta http-equiv="Content-Type" content="text/html; charset=GBK"><title> Mouse changes the color to TR</title>

2025-03-01
Html5 implementation desktop notification prompt function

The specific code is shown below: <button id=button>Someone wants to add you as a friend</button><p id=text></p> (function () {if (window.notification) {var btn = d

2025-03-01
Usage instructions of style.left and offsetLeft in javascript

If the position of the parent div is defined as relative and the position of the child div is defined as absolute, then the value of style.left of the child div is relative to the value of the parent div, which is the same as offsetLeft. The difference is

2025-03-01
Mobile web screen adaptation (rem)

Preface: I recently sorted out my notes from my previous front-end studies, and found that I didn’t really understand the screen adaptation (rem) aspect of the mobile web, I just knew how to use it. Next, record some of your thoughts on mobile web screen

2025-03-01
window.open pass parameter example code in post

Copy the code as follows: //Open a new page and pass the parameters using post function openNewPageWithPostData(postAddress,opentype,paramNames,paramValues) { var newWi

2025-03-01
Click the pop -up layer effect & amp; after the pop -up window pops up, the background of the web background becomes the implementation code

Copy code code as follows:<html><head><title> Web special effects-window special effects-The effect of the web background after pop-up window becomes darker</title>

2025-03-01
JS verification phone number and mobile phone support +86 regular expression

Copy code code as follows:

2025-03-01

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