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  • Summary of some error types in Node.js

    Summary of some error types in Node.js

    Preface There are many types of errors that may occur in Node.js applications. For example: When a syntax error or runtime error occurs, a JavaScript error will be triggered; when trying to access a file that does not exist or is not accessed, a system er
    2025-08-26
  • Native JS implements home page progress loading animation

    Native JS implements home page progress loading animation

    The js progress loading animation program is my personal work. If it is not well written, you can refer to it, but without my permission, please do not use it for other purposes! I wrote a homepage progress loading animation in the morning. I wanted to us
    2025-08-26
  • A simple understanding of this pointing in JavaScript

    A simple understanding of this pointing in JavaScript

    First of all, it must be said that this pointing cannot be determined when the function is defined. Only when the function is executed can this point to who this point is. In fact, this ultimately points to the object that calls it (there are some problem
    2025-08-26
  • node.js implements multi-image upload example

    node.js implements multi-image upload example

    First, put the renderings: This is the code I used to do more pictures at that time. I will take it out for you to learn from (some places need to be modified by yourself, the general direction is correct). There are three files in total (regularly speaki
    2025-08-26
  • Some insights into js eval() function

    Some insights into js eval() function

    1. Eval is the basic rule 1 The eval() function can calculate a certain string and execute the JavaScript code in it. 2 eval(string)3 string is required. The string to be calculated contains the JavaScript expression to be calculated or the statement to b
    2025-08-26
  • JS implementation returns selected text based on the current text selection

    JS implementation returns selected text based on the current text selection

    The code copy is as follows:<script> function doit(){ newT=document.selection.createRange() clipboardData.setData("Text",newT.text) if(cli
    2025-08-26
  • Summary of the commonly used string processing methods of JS

    Summary of the commonly used string processing methods of JS

    1.indexOf() method, finds the string position from front to back, is case sensitive, and counts from 0. Similarly, the lastIndexOf() method is from behind to front, and the results of the two methods output the same search conditions for the same search c
    2025-08-26
  • Perfect solution to the loss of decimal precision in javascript

    Perfect solution to the loss of decimal precision in javascript

    Reason: js handles the addition, subtraction, multiplication and division of decimals according to 2. On the basis of arg1, the accuracy of arg2 is expanded or inversely expanded, so the following situation will occur. The problem of adding, subtracting,
    2025-08-26
  • Easy way to get element styles in native js

    Easy way to get element styles in native js

    During the development process, we often encounter the style of DOM elements through js. There are many methods, such as: by changing the class of DOM elements. Now we discuss native js to get the CSS style of the DOM element. Note that the acquisition is
    2025-08-26
  • HTML end tag problem with w3c standard

    HTML end tag problem with w3c standard

    HTML must have an ending of /html to be a complete element, unless it is a self-closed tag. Currently, most websites use the xhtml standard writing method for SEO and multi-browser support. According to the principle of w3c, each start tag of xml must hav
    2025-08-26
  • National provincial and municipal secondary linkage drop-down menu js version

    National provincial and municipal secondary linkage drop-down menu js version

    The examples in this article share with you the specific code of js to implement the secondary linkage drop-down menu for your reference. The specific content is as follows: /** National Second-level City Linkage js version*/function Dsy(){ this.Items = {
    2025-08-26
  • JS determines the current browser type and determines the IE browser method

    JS determines the current browser type and determines the IE browser method

    Shortest IE judgment method, original address: //www.VeVB.COM/article/23621.htm The shortest method for judging IE browser: var isIE = !-[1,] Principle: [1,] Return "1" in standard browser, equivalent to calling [1,].toString(), in IE
    2025-08-26
  • Detailed explanation of node web page segment rendering

    Detailed explanation of node web page segment rendering

    Page rendering is usually divided into front-end rendering and back-end rendering. Front-end rendering refers to the server returning the html framework and template, and the front-end pulls the data and renders the template through ajax asynchronous requ
    2025-08-25
  • Javascript implementation code to display the start and end days by selecting the number of weeks

    Javascript implementation code to display the start and end days by selecting the number of weeks

    Recently I encountered a query page in a project, where a query condition is to display the selected number of days to days of the week based on the selected year, month and week number. I searched online and found that there were similar ones but not exa
    2025-08-25
  • Analysis of JavaScript imitating Taobao page pictures and scrolling and refreshing back to the top

    Analysis of JavaScript imitating Taobao page pictures and scrolling and refreshing back to the top

    Taobao image processing discussion Taobao page is very large, but it opens very fast. The image processing uses scroll loading, which means where the scrolling axis rolls and where the picture is loaded. But if you want to check its source code, it will t
    2025-08-25
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