JavaScript in Escape (), unescape (), encodeURI (), encodeURIComponent (), decodeur ...

These URI methods encodeURI, encodeURIComponent (), decodeURI (), decodeuricomponent () Replace the Escape () and unescape () methods of the BOM. URI methods are preferable because they encode all Unicode symbols, whereas the BOM method can encode

Why do I encourage the addition of the Var keyword when JavaScript declares variables

In JavaScript, VAR is used to declare variables, but this syntax is not strictly required, and in many changes, we can directly use a variable without var to declare it.[JavaScript]View Plaincopyprint? var x = "XX"; y ="xxx";

What happens to Javascript:alert (this.innerhtml) in the href attribute of the tag?

Original: What happens to Javascript:alert (this.innerhtml) in the href attribute of the tag? tags The above code does not get the result you want because the this object of the href attribute in the tag is not the current tag of the

JavaScript's V8 engine research

1. Context-specific snapshot technologyWhat is context (contexts)? is actually the JS application's operating environment, avoids the application modification mutual influence, for example a page JS modifies the built-in object method ToString,

Basic concepts of javascript--objects (II.)

First, create a functionA function is an object: A function class is an object that can be instantiated by functions, but most of it is using function to create functions. Method One: Use function classes to instantiate functions:1 var people=New

JavaScript determines if a string can be converted to a number

Determine if a string can be converted to a numberWe often use the parseint function.However, the scope of the function is very small.Generally, the following are similarvar mystr = "123hello";Using parseint or isNaN (MYSTR) does not determine

JavaScript Advanced Programming Notes (VII)

function expressionMethods for defining functions:function declaration:function functionname (arg0, arg1, arg2) {function body}Firefox, Safari, Chrome, and Opera define the Name property for the function whose value is equal to the identifier after

JavaScript implicit type conversion steps

Original: JavaScript implicit type conversion stepsThe implicit type conversion, which is said here, is the conversion caused by = =. Returns False if there is a Nan And see if there's a Boolean, and Boolean converts the Boolean to a number.

In-depth understanding of JavaScript prototypes and Closures (14)-from "Free variables" to "Scope chains"

Let's first explain what "free variables" are.The variable x used in a scope is not declared in a scope (that is, declared in other scopes), and for a scope, X is a free variable. Such asAs in the previous program, when the FN () function is called,

JavaScript implicit type conversion steps

The implicit type conversion, which is said here, is the conversion caused by = =. Returns False if there is a Nan And see if there's a Boolean, and Boolean converts the Boolean to a number. Then see if there is a string, there are three

JavaScript Event Model

Event FlowEvent bubblingFor the event stream, IE uses event bubbling technology. The basic idea is that the event is triggered from the very inside of the event and is triggered up to the most external (document object).Event captureEvent trapping

JavaScript implicit type conversion steps

The implicit type conversion, which is said here, is the conversion caused by = =. Returns False if there is a Nan And see if there's a Boolean, and Boolean converts the Boolean to a number. Then see if there are no strings, there are

JavaScript settings and get cookie values

//Set CookiesfunctionSetcookie (name,value,expires,path,domain,secure) {varCookieName = encodeURIComponent (name) + ' = ' +encodeURIComponent (value); if(ExpiresinstanceofDate) {CookieName+ = '; expires= ' +expires; } if(path) {CookieName+ = ';p

JS statement execution order in Javascript

If we have embedded in the HTML as JS block of code (in fact, JS does not have a block of code meaning, if really want to think of code block that also should be divided by function block), Here is the JS Code execution order: Here reproduced JS

Javascript callback function Understanding---Two WA buy kidney machine 6

In JavaScript, what is a callback function, I think simply is to pass a function B as a parameter to another function A, in a function in a certain time call function B.As you can see here, the callback function forms a closure that accesses the

Developing with JavaScript 2048

Well, team-mates have developed a simple 2048 ... Haha, no way, the game is so crazy, must be engaged, we can paste the code directly into an HTML file, directly execute canDependent files: jquery, if anything, you can download a copy of your -->

A detailed description of JavaScript advanced techniques

The use of the function JavaScript built-in type detection mechanism is not completely reliable. If the Object.prototype.toString () method is not modified, the following security detection method can be used to detect whether it is native: function

Javascript Strict mode details (top)

ECMAScript 5 was the first to introduce the concept of "strict mode" (strict). Strict mode allows you to select a more rigorous global or local error condition detection within the function. The advantage of using strict mode is that you can know

Scoped chains and closures in JavaScript

scoped chains and closures in JavaScript2012-06-29 11:41 1878 people read reviews ($) Collection report There is a concept in JavaScript that has not been learned before--closures. What is closure? The enclosing package, which is understood from

The unique var pattern in the body of the JavaScript base function (002)

Global variables are not good. So when it comes to the fame variable, you should use the unique var pattern in the function body (single Var). This model has a number of benefits: Provides a unique place to see the variables in the body of

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