JavaScript

Add the following code to the front of the JavaScript Copy Code code as follows: /* @cc_on _d=document;eval (' var document=_d ') @*/ To join such a line of code IE's document access speed can be increased by at least 5 times

The Ancients have "given the fish, as the award of the fishing", without teachers, they can only learn "fishing". Let's start with a simple one! The following code is the most familiar, but do you know why it's written? Why add this code to the page,

Yesterday, with the jquery plug-in aeimageresize, found that it has more advantages: each picture after loading, will be immediately to zoom. This is attributed to the loading event of image object image onload. View the source of the plug-in, found

1. Avoid using eval or function constructors 2. Avoid using with 3. Do not use try-catch-finally in functions that are critical to performance requirements 4. Avoid using global variables 5. Avoid using for-in in functions that are critical to

In the process of writing a program, you often encounter the need to remove duplicate elements from an array. It is not difficult to implement this function. We can do this with a double loop, and for small arrays, that's certainly not the case. But

Copy Code code as follows: var str = "123#ABC"; var re =/abc/ig; Console.log (Re.test (str)); Output ture Console.log (Re.test (str)); Output false Console.log (Re.test (str)); Output ture Console.log (Re.test (str)); Output false

/** * JavaScript Modeldialog v0.1 * * New Modeldialog ({ * Caption Title ' dialog box title ' (default) * Template Subject content ' (default) * Dialogcls dialog box classname ' Md-dialog ' (default) * headcls head classname ' md-head ' (default) *

Copy Code code as follows: In IE, there are sometimes "unknown run-time errors" (Unknown runtime error), but not in Firefox. This is mainly the case of IE in the write operation of the innerHTML will check whether the element has to

Caller: Functionname.caller returns the caller. Take a look at the following function, you can copy it to vs under Execute Copy Code code as follows: function caller () { if (Caller.caller) { Alert (caller.caller.toString ());

Example 1: Copy Code code as follows: var obj={0: ' A ', 1: ' B '} alert (obj.length); Undefined var arr=[' A ', ' B '] alert (arr.length); 2 From the example above, the length property in the class array object is not

JavaScript asynchronous programming is gradually accepted by everyone, previously we generally through callback nesting, settimeout, setinterval, etc., the code looks very intuitive, do not look at the entire code logic is difficult to quickly

1. Interface design Index.html: Only a placeholder for the location where the wizard is displayed Copy Code code as follows: Gift Recommendation Guide STYLE.CSS: By default, the wizard has a

In section 2.8.4, the substring () method and the slice () method in the string class are basically the same as the return results, as in the following example: Copy Code code as follows: var strobj = new String ("Hello World");

Look at a simple jquery example to traverse a JavaScript array object. var json = [ {"id": "1", "TagName": "Apple"}, {"id": "2", "TagName": "Orange"}, {"id": "3", "TagName": "Banana "}, {" id ":" 4 "," TagName ":" Watermelon "}, {" id ":" 5 "

A few days ago to see a face test, the topic is this: What do you say about Apply,call,bind in JavaScript? It's a cliché to apply and call first, but for bind, I froze because the word was a very high frequency in jquery used to bind events to DOM

Today, there is a small problem, in the building DOM, IE can not pass Element.setattribute (' name ', _variable); and element.name = _variable; In this form, add the name attribute to the element, whether it is IE6 or IE7. (IE8 is OK, but ie8rc1 not)

The DOM Document Object model is an application interface (API) for HTML and XML, and the DOM plans the entire page as a document composed of node hierarchies. DOM objects give developers access to HTML and enable developers to process and view HTML

Introduced In this article, we will discuss more details that are directly related to the execution context. The subject of the discussion is the this keyword. Practice has shown that this topic is difficult, and it is often problematic to determine

First, Judge Grammar Prop in ObjectName The In operator returns true if the object that the objectname points to contains prop this property or a key value. Copy Code code as follows: var arr = [' One ', ' two ', ' three ', ' four ']

Copy Code code as follows: /* * Base64 Code */ var base64encodechars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/"; var base64decodechars = new Array ( -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1