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  • Implementation method of Bootstrap+jfinal exit system pop-up confirmation box

    Implementation method of Bootstrap+jfinal exit system pop-up confirmation box

    This article shares the logout operations of jfinal and bootstrap for you, aiming to introduce how to pop up the logout confirmation box through the a tag, then send an exit request to jfinal, and then refresh the page. The main difficulties are the follo
    2025-07-23
  • Javascript basic tutorials comparing null and undefined values

    Javascript basic tutorials comparing null and undefined values

    There are two special values in JavaScript: undefined and null, and you need to be careful when comparing them. What you get when reading unassigned variables or trying to read properties that the object does not have is the undefined value.<!DOCTYPE html
    2025-07-23
  • How to define an array of objects in javascript

    How to define an array of objects in javascript

    The problem is as follows: a simple application of a single object has been completed, hoping to define an array that can contain multiple students. Copy the code as follows: var student = new Object(); student.name = "Lanny"; student.age = &quo
    2025-07-23
  • Very practical js verification framework to implement the source code with principle method

    Very practical js verification framework to implement the source code with principle method

    This article will share with you a very practical js verification framework implementation source code for your reference. The specific content is as follows: if (!eval(scriptCode)) in the method of function check(thisInput) { return false;
    2025-07-23
  • Function.prototype.apply() and Function.prototype.call() summary

    Function.prototype.apply() and Function.prototype.call() summary

    Always forget about the use of these two things and write them down to make a record. Their functions are exactly the same, but the parameters passed in are different apply apply accepts two parameters. The first one formulates the direction of this objec
    2025-07-23
  • Detailed explanation of SQL instances in the AngularJS introductory tutorial

    Detailed explanation of SQL instances in the AngularJS introductory tutorial

    The code in AngularJS SQL in the previous chapters can also be used to read data in the database. Get data from MySQL using PHP<!DOCTYPE html><html><head><meta charset="utf-8"> <s
    2025-07-23
  • Question about whether methods in JS are bracketed

    Question about whether methods in JS are bracketed

    When we write programs by js, we will write many functions and call them. So when do we add () and when do we add () when these functions are called? Remember the following points. (1) Do not bracket when making parameters of functions. function fun(e) {
    2025-07-23
  • JS code to implement table data paging effect

    JS code to implement table data paging effect

    The first one: It is implemented very common and simple. The page turn effect diagram is displayed: This is HTML code, which is very simple (I seem to see the little eyes that are disliked)<!DOCTYPE html><html><head lang="en"><meta charset="UTF-">
    2025-07-23
  • JS method to read XML file data and display data in table form (compatible with IE and Firefox)

    JS method to read XML file data and display data in table form (compatible with IE and Firefox)

    This article describes how JS reads XML file data and displays data in table form. I will share it with you for your reference. The details are as follows: Let’s look at the xml file first:<xml version="1.0" standalone="yes"><student><stuinfo>
    2025-07-23
  • Understanding of valueOf and toString in JavaScript functions

    Understanding of valueOf and toString in JavaScript functions

    Today I saw a test question, which implements the following syntax function: var a = add(2)(3)(4); //9 This is the application of a higher-order function. Analysis: add(2) will return a function, add(2)(3) will also return a function, and finally add(2)(3
    2025-07-23
  • Node.js implements file upload

    Node.js implements file upload

    I encountered such a requirement in my work, and I needed to use nodejs to upload files. I used to only know how to upload files through the browser. If I use nodejs, it is equivalent to simulating the behavior of the browser. After Google, I realized tha
    2025-07-23
  • Introduction to JavaScript Event Model

    Introduction to JavaScript Event Model

    1. The event type of the original event model: It is divided into "input event (such as onclicki)" and "semantic event (such as onsubmit)" event program registration can be as follows: 1. The JS code is used as HTML property value to c
    2025-07-23
  • JavaScript Geolocation Information API

    JavaScript Geolocation Information API

    For a web development programmer, one of the most interesting aspects of development work is to obtain geographical location information; just imagine where are the users browsing your web pages? Programmers can adjust the website's language, specific
    2025-07-23
  • Detailed explanation of several usages of JS to generate random numbers

    Detailed explanation of several usages of JS to generate random numbers

    Detailed explanation of several usages of JS to generate random numbers<script> function GetRandomNum(Min,Max){ var Range = Max - Min; var Rand = Math.random(); return(Min +
    2025-07-23
  • JavaScript must know (two) null and undefined

    JavaScript must know (two) null and undefined

    null null means "empty", use typeof (null);//Object; to indicate that it is a special object. The null type is only a member of itself. It does not contain attributes and methods. undefinedundefined also means "empty", use
    2025-07-23
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