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  • javascript+HTML5 Canvas draw turntable lottery

    javascript+HTML5 Canvas draw turntable lottery

    Among the projects I have done before, there are those who need the lottery turntable function. The project has been completed for a while and there are no serious bugs, so I will share it with you now. Functional requirements 1. The turntable should be b
    2025-07-10
  • js dynamically add elements (div, li, img, etc.) and methods to set properties

    js dynamically add elements (div, li, img, etc.) and methods to set properties

    Assign a string of html tags to a javascript variable. In addition to the escaped double quotes of the attribute value, the string is still very long and seems a bit complicated at some point. If you add elements dynamically with js, there will be no such
    2025-07-10
  • AngularJS Introduction Tutorial: AngularJS Model

    AngularJS Introduction Tutorial: AngularJS Model

    Related reading: AngularJS Introduction Tutorial: AngularJS Expressions AngularJS Introduction Tutorial: AngularJS Directive In the previous tutorial of expressions and instructions, the AngularJS model (ng-model) can combine the values ​​in the HTML inpu
    2025-07-10
  • Analysis of common digital conversion examples of javascript

    Analysis of common digital conversion examples of javascript

    This article describes the common digital binary conversion method in JavaScript. I will share it with you for your reference. The details are as follows: The basic idea is to first convert other fundamentals into decimals, and then convert them. This pro
    2025-07-10
  • A brief analysis of the scope in javascript (recommended)

    A brief analysis of the scope in javascript (recommended)

    The so-called scope can be simply understood as a scope (area) that can be read and written. Some students with experience in js may say: "js has no block-level scope". In addition to global scope, only functions can create scopes. One advantage
    2025-07-10
  • Detailed explanation of Bootstrap button component

    Detailed explanation of Bootstrap button component

    The button group is the same as the drop-down menu component, and needs to rely on the button.js plugin to function properly. Structural aspect: Use a container with class name btn-group and place multiple buttons in this container. The button group is al
    2025-07-10
  • A comprehensive understanding of error handling mechanisms in javascript

    A comprehensive understanding of error handling mechanisms in javascript

    The previous error handling is crucial for web application development. It cannot predict possible errors in advance and cannot adopt recovery strategies in advance, which may lead to poor user experience. Since any javascript error can cause the web page
    2025-07-10
  • Detailed explanation of alternative writing methods for JavaScript

    Detailed explanation of alternative writing methods for JavaScript

    JavaScript is a scripting language belonging to the network! JavaScript is used by millions of web pages to improve design, verify forms, detect browsers, create cookies, and more. JavaScript is the most popular scripting language on the Internet. JavaScr
    2025-07-10
  • Summary of methods for taking the maximum value in a two-dimensional array in JS

    Summary of methods for taking the maximum value in a two-dimensional array in JS

    In JavaScript, you can use the built-in maximum value of Math.max(), but it is still difficult to extract the maximum value from multiple arrays. Problem description suppose you have an array, and this array contains a subarray of numbers, and what we wan
    2025-07-10
  • Deeply understand JS regular expressions---grouping

    Deeply understand JS regular expressions---grouping

    In-depth understanding of JS regular expressions--I wrote an article about getting started with regular novices before. I thought I was relatively familiar with regular expressions, but today I encountered another pitfall. Maybe it was because I was not c
    2025-07-10
  • Explanation of small cases of provincial and municipal linkage at the second level

    Explanation of small cases of provincial and municipal linkage at the second level

    During the web development process, when selecting provinces and cities, the relationship between provinces and cities is a small secondary linkage case. Using asynchronous requests for HTML, css, php, js and AJAX, first establish the city.php and provinc
    2025-07-10
  • JavaScript operator - comprehensive analysis of logical operators

    JavaScript operator - comprehensive analysis of logical operators

    In the previous words, the logical operator performs boolean operations on operands and is often used in conjunction with relational operators. Logical operators combine multiple relational expressions into a more complex expression. Logical operators are
    2025-07-10
  • Angular.js implements the example code of digital conversion Chinese characters

    Angular.js implements the example code of digital conversion Chinese characters

    AngularJS Introduction AngularJS is a JavaScript framework. It can be passed<script> 标签添加到 HTML 页面。AngularJS 通过 指令 扩展了 HTML，且通过 表达式 绑定数据到 HTML。下面通过本文给大
    2025-07-10
  • Simple code to add and remove class by native js

    Simple code to add and remove class by native js

    Example code: function hasClass( elements,cName ){ return !!elements.className.match( new RegExp( "(//s|^)" + cName + "(//s|$)"
    2025-07-10
  • Comprehensive understanding of JavaScript objects advanced

    Comprehensive understanding of JavaScript objects advanced

    To understand JavaScript objects, we can start from object creation, property operations, and object methods. In summary, it includes the following modules: 1. Creating an object 1.1 Object Direct Object Direct Object is the easiest way to create an objec
    2025-07-10
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