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  • Solve the problem that checkbox's attr(checked) has been undefined

    Solve the problem that checkbox's attr(checked) has been undefined

    Recently, this film needs to be designed to provide a checkbox function that is selected all. Oh, isn't this a very simple thing? One general checkbox, N multiple sub-checkboxes. Once the general checkbox is selected, all sub-checkboxes are selected.
    2025-04-22
  • javascript Get HTML DOM parent, child, and adjacent node

    javascript Get HTML DOM parent, child, and adjacent node

    In the development of web applications, especially Web2.0 programs, it is often necessary to obtain an element in the page and then update the style, content, etc. of the element. How to get the elements to be updated is the first problem to be solved. It
    2025-04-21
  • Introduction to the use of functions opposite to Math.pow

    Introduction to the use of functions opposite to Math.pow

    was a = [1,2,4,32,128]; was b = []; for (was i = 0; in
    2025-04-21
  • Tips for triggering select onchange event by js

    Tips for triggering select onchange event by js

    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 event needs to be t
    2025-04-21
  • JavaScript Learning Notes (Two) Array and Object Parts

    JavaScript Learning Notes (Two) Array and Object Parts

    JavaScript object part 1: Basic part 1. All variables in JavaScript are objects, with the exception of null and undefined. 2.Jscript supports four types of objects: internal objects, generated objects, and objects given by the host (all BOM and DOM object
    2025-04-21
  • Summary of three ways of numerical conversion of JavaScript

    Summary of three ways of numerical conversion of JavaScript

    In JavaScript, there are generally three ways to convert numerical values: 1. Number (param) function: param can be used for any data type 1.1 param is the Boolean value, true and false are converted to 1 and 0 respectively; 1.2 param is a numeric value,
    2025-04-21
  • Summary of js inheritance call() and apply() methods

    Summary of js inheritance call() and apply() methods

    1. Method definition call method: Syntax: call([thisObj[,arg1[, arg2[, [,.argN]]]]]) Definition: Call a method of an object and replace the current object with another object. Description: The call method can be used to call a method instead of another ob
    2025-04-21
  • Detailed explanation of node.js implementation of BigPipe

    Detailed explanation of node.js implementation of BigPipe

    BigPipe is a technology developed by Facebook to optimize web page loading speed. There are almost no articles implemented with node.js on the Internet. In fact, it is not just node.js. BigPipe implementations in other languages ​​are rare on the Internet
    2025-04-21
  • Detailed explanation of JavaScript quick sorting algorithm

    Detailed explanation of JavaScript quick sorting algorithm

    The idea of ​​"quick sorting" is very simple. The whole sorting process only requires three steps: (1) In the data set, find a benchmark point (2) Create two arrays, store the left and right arrays respectively (3) Use recursion to compare and s
    2025-04-21
  • HTML page list tagging tutorial

    HTML page list tagging tutorial

    HTML web page list tagging tutorial. In the html page, the list can play the role of writing outlines. Lists are divided into two types: one is an ordered list and the other is an unordered list. The former uses bullets to mark unordered items, while the
    2025-04-21
  • Examples of N methods for judging integers in JavaScript

    Examples of N methods for judging integers in JavaScript

    Integer types (Integer) often cause some strange problems in JavaScript. In the specification of ECMAScript, they exist only in the concept: all numbers are floating point numbers, and integers are just not a set of numbers without decimals. In this blog,
    2025-04-21
  • Current popular JavaScript code style guide

    Current popular JavaScript code style guide

    JavaScript does not have an authoritative coding style guide, but instead it is some popular coding styles: copy the code as follows: Google's JavaScript style guide (hereinafter referred to as Google) http://google-styleguide.googlecode.c
    2025-04-21
  • What are the benefits of HTML5 old and new syntax tags for us

    What are the benefits of HTML5 old and new syntax tags for us

    Comment: As we all know, HTML is the greatest invention in the history of the Internet. The purpose of HTML5 is to improve it according to the current situation of the Internet. As we all know, HTML is the greatest invention in the history of the Internet
    2025-04-21
  • JS realizes flashing title message reminder effect

    JS realizes flashing title message reminder effect

    Sometimes we need to remind users that there are new messages, and this can be achieved using the following method. The effect is that when the web window does not get the focus and is minimized, the content displayed in the title bar "title" of
    2025-04-21
  • Implementation method of adaptive web page size on mobile

    Implementation method of adaptive web page size on mobile

    Finally completed the project at hand, and the missing person is back! During the process of doing a project, I encountered many points worth thinking about, so I can go quickly. The first thing I encountered was the problem of adapting to web page size.
    2025-04-21
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