JavaScript

The DOM is the abbreviation for the Document Object model. Based on the Web Dom specification, Dom is a browser, platform, language-independent interface that allows you to access other standard components of the page.Features and methods of the

Before we introduce the event model, let's look at what the event is and what is the events object.An introduction to the eventJavaScript events are a series of actions caused by users who visit Web pages, giving us the ability to create dynamic

ObjectiveThis article is my Learning JavaScript process in the collection and collation of some of the error-prone knowledge points, will be from the scope of variables, type comparison, this point, function parameters, closure problems and object

Syntax: both foreach and map support 2 parameters: One is the callback function (Item,index,input) and the context;. foreach: Used to iterate through each item in the array; This method executes without a return value and has no effect on the

Higher-order functions are called Higher-order function in English. JavaScript functions actually point to a variable. Since the variable can point to a function, the function's arguments can receive the variable, then one function can receive

The Document.execcommand () method handles HTML data often in the following syntax format: Document.execcommand (scommand[, interactive mode, dynamic parameter]) Where:Scommand is the instruction parameter ("2d-position" in the following example ),

Transferred from: http://blog.csdn.net/fightplane/article/details/5190037A href= "#" > click on the link, the page will scroll up to the top of the page, # The default anchor point is #TOP Click the link, the page does not move, only the link is

ObjectiveThe title of Big Happy Brother is finished, but a new problem is derived! In the last essay, my brother and I used the random number generation method, in the end who is more fair???BodyWelcome to a section of the blog "ideas"! Our slogan

Loops and iterations of JavaScript arraysCycleFor loopNormal version for loopvar arr = ["a","b","C", " D " ]; for 0; i ) { console.log (arr[i]); . // a b c d}Optimized for Loopvar arr = ["a","b","C", " D " ]; for 0; Len = Arr.length;i ) {

JavaScript is a special language, and there is no concept of class in ECMAScript. There are some differences with other object-oriented languages. Its objects are also different from those in class-based languages, and strictly speaking, JavaScript

The ECMA defines an object as a collection of unordered properties whose properties can contain basic values, objects, or functions.1. Creating an object using the object constructorThe simplest way to create a custom object is to create an instance

There are some issues that are especially suitable for stack resolution. This section describes several examples of this.1) Mutual conversion between the numbering unitA stack can be used to convert a number from one to another. The false idea is to

1. IdentifiersJavaScript identifiers must begin with a letter, an underscore (_), or a dollar sign ($). Subsequent characters can be letters/numbers/underscores/dollar signs. You can also use non-English language or mathematical symbols to write

Today encountered a pit, specifically not much to say, directly on the code var a = [[],[],[1,2,3]]var b = [' Color ', ' size ', ' size ']var arr = []fo R(Let i = 0; i ) {= { }for (Let j = 0; J ) {= a[i][j] arr.push (obj)

Array-heavy operations are often used in JavaScript project development. This is the way to use the JS array to heavy.Demo1:The first: JS array de-re-operation method is to use the traversal of the original array, using the array of indexof ()

Pay attention to the lastIndex attribute for regular expressions in JS, Description This article focuses on the attributes of the RegExp object in JavaScript. Explanation Each RegExp object contains five attributes: source, global, ignoreCase,

Node. js REPL (Interactive interpreter) instance details, node. jsrepl Node. js REPL (Interactive Interpreter) Node. js REPL (Read Eval Print Loop: Interactive interpreter) indicates a computer environment. Similar to the terminal of the Window

LocalStorage usage and localstorage usage 1. What is localStorage? In HTML5, a new localStorage feature is added, which is mainly used as local storage, solve the problem of insufficient cookie storage space (the storage space of each cookie in the

You can use the url rewriting mechanism to change the verification code. URL rewriting mechanism: to ensure that the address of a url is unique, you can transmit different parameters to the server each time. The header information of a data request

Angularjs's $ http asynchronous data deletion details and examples, angularjs asynchronous Explanation of $ http asynchronous data deletion in Angularjs and Examples Some people may say that there is something to say about deleting this thing. Write