JavaScript

Hash lists and hash maps are the same, and we've covered this data structure in this chapter. In some programming languages, there is also an implementation called a hash set. A hash set consists of a collection, but when an element is inserted,

Combine the constructor pattern with the prototype pattern:　　function person (name, age, Job) { this.name = name; This.age = age; This.job = job; This.friends = [' Shelby ', ' Court ']; } Person.prototype = { Connstructor:person,

There is a sentence called nothing is a cycle can not solve, if there is, then a loop.There are many types of loopsForward for loop, reverse for loop, while loop, For-in loop (worst in theory), For-each Loop, Duff ' s device loop (theoretically best

SOURCE project: https://github.com/blff122620/jsLibary/lazyLoad.htmlThe principle of implementation is to determine whether an element has entered the viewport through the scroll eventImportLazyload.jsUseInviewport (item) can determine if item is in

Recently explored the JS principle in the process of encountering this very interesting problem.Paste the code First:var a = {n:1}a.x = a = {N:2}alert (a.x)//undefinedBefore we figure this out, let's first popularize a point of knowledge, that is,

Mode 1:splice functionvar arr = [0,1,2,3];arr.splice (0, arr.length); Console.log (arr)Splice (2,1, "Lemo"); arr = [0,1, "Lemo", 3];The first parameter of the splice represents the starting position of the increment and delete elementsThe second

1. Properties of the Action objectAttention:The corresponding relationship between the Tag property and the DOM object property:The vast majority of the 2 are the same. such as: the Imgobj.src property corresponding in the src attribute, but there

The front-end is big, big to those who even do not know the class only on the course of people will use jquery to write the page ...When there is an explosive growth in the number of practitioners in an industry, it is based on the scale effect that

Events (Event)1. What is a JavaScript event?An event is a specific interaction moment that occurs in a document or browser.2. Event FlowThe event flow describes the order in which events are accepted from the page, including the event bubbling

1 Divclass= "Top-progress"ID= "Js-top-progress">Div> structure Only a word can -2 Scriptsrc= "./static/js/progress.js">Script>3 Scripttype= "Text/javascript">4 varP=myprogress.create (document.getElementById ("#js-top-progress"), "#21a557", false);

code base for JavaScriptThis article is mainly a collection of some JavaScript in some of the frequently used code. Convenient for later search and reuse.JavaScript Framework:the definition of a function in JS:Function name (){function body}three

Selector (JQuery Selector)jquery is a JavaScript library that greatly simplifies JavaScript programming. The entire jquery library method is in this factory function, we only need to instantiate the $ object, providing a selector as a parameter can

HTML document divided into element node attribute node text nodeGet element node Dom method: getElementById getElementsByTagName GetelementsbyclassnameTo create an element node method: createelementInsert a node method: AppendChildWays to get

Purpose of Mission: Delete a label every click of a button. Mastered the following: Here is the main learning to Parentnote and removechild two DOM attributes. Parentnote:parent English translation As a father, note

One, JavaScript "logical" operator很多学习 JavaScript的人，容易被 JavaScript 的逻辑运算符的运算规则搞晕。为什么呢？因为JavaScript的逻辑运算符和其他语言(比如：java、c#、c等)有着很大的不同。其他那些强类型的语言的逻辑运算符参数运算的都是

Introduction to the use of window.onload in JavaScriptThe Window.onload Load event executes the appropriate function immediately after the page content is loaded. Window.onload How to use: 1) window.onload=function () {     var

Because of the needs of colleagues to the front-end to export Excel table, online to find some demo, their own modified a bit, may later use, record it, compatible with IE and some mainstream browser, ie may error, the reason for reference here,

Align text and image vertically and horizontally with css Align text and image vertically and horizontally using css  I have always believed that good memory is not as good as a bad pen. Recently I have encountered many vertical center tasks. sort

Use css3 to make glass wool, and css3 to make glass wool I 've been watching a lot of cool effects recently. Currently, there are many jquery-based plug-ins, but many plug-ins have poor compatibility, so the native is the king. In daily life, glass

Getting started with HTML and getting started with html1. Introduction to HTML Hypertext Markup Language (HTML) is a Markup Language used to describe Web documents. HTML tag is usually called HTML tag ). HTML provides many tags, such as paragraph