JavaScript

This article illustrates the way that JavaScript implements values across pages. Share to everyone for your reference. Specifically as follows: The questions are as follows: The, onsubmit event in the A.html page calls a method foo (), which opens

This article illustrates how JavaScript uses indexof to get a substring's position in a string. Share to everyone for your reference. Specifically as follows: click the button to locate where in the String a specifed value occurs. try it

The slice () method returns the selected element from an existing array. Well, I admit I forgot it! This time I'm looking back at it. Grammar Arrayobject.slice (Start,end)Array. Slice (start, end) Thomas,james Select array index 2nd

The example in this article describes the way JavaScript uses concat to connect arrays. Share to everyone for your reference. Specifically as follows: The following code shows how to link multiple arrays through the concat function in JS

The examples in this article describe the way JavaScript uses prototype to implement object-oriented methods. Share to everyone for your reference. The specific analysis is as follows: Prototype is a property of a Function object that points to

On a basic level, it is important to understand how JavaScript timers work. The execution of timers is often different from our intuitive imagination, because the JavaScript engine is single-threaded. Let's start by recognizing how the following

The scrolltop represents the height of the scroll, default from position:0, and the offset of scrolltop (offset) represents the offset at the top, in pixels,The scrolltop () scrolling height can either ' set ' the scrolling value or ' get ' the

The example of this article analyzes JavaScript's method of refreshing the parent page after the execution of the Open.window child page. Share to everyone for your reference. The specific analysis is as follows: Main Page: " The

This example describes how JavaScript gets the last modification time of the current page. Share to everyone for your reference. Specifically as follows: The following JS code output the current page last modified time, using the

1. Use judgment skillfully: In JS, nan,undefined,null,0, "" when converted to bool, is false, so you can write this. Copy Code code as follows: if (!obj) {} Represents what is done when an object is false, because if obj

The examples in this article describe how JavaScript obtains URLs in the Base tab of a page. Share to everyone for your reference. Specifically as follows: If the base tag is defined in the Web page, we can get the URL address of base via JS code

The examples in this article describe the methods available or unavailable for JavaScript control buttons. Share to everyone for your reference. Specifically as follows: The following JS code controls whether the button is available through the

The example in this article describes how JavaScript implements adding multiple event handlers for a specified object. Share to everyone for your reference. Specifically as follows: If you want to handle multiple things while the object clicks, you

If you're still a beginner, and you read all of these tips and each of these tips is to use them later in your work, you'll write more concise and efficient JavaScript programs. Indeed, JavaScript gurus have used these techniques to write a number

Some jquery plug-ins often see a similar callback.call (xxx,xxx) while seeing that the book says call and apply functions can change scopes, it's not quite clear how changing scopes is primarily about solving problems, having alternatives, or These 2

This paper illustrates the ENCODE64 encryption algorithm implemented by JavaScript. Share to everyone for your reference. Specifically as follows: This JavaScript code can implement the ENCODE64 encryption algorithm, the speed is quite good.

The cause of the cross domain problem Cross-domain problem is browser homology policy restrictions, the current domain name JS can only read the same domain window properties. Scenarios generated by Cross-domain problems When you want to use JS

This article illustrates how JavaScript controls the way the Web layer is closed and expanded. Share to everyone for your reference. as follows: "> --> Cool div layer expansion contraction effect div layer's unfolding hidden

The examples in this article describe the way JavaScript implements a simple two-level navigation menu. Share to everyone for your reference. as follows: css Menu Demo 0? "": "") + "Sfhover"; } sfels[i].onmousedown=function ()

The examples in this article summarize the common ways to manipulate JavaScript tables. Share to everyone for your reference. as follows: Untitled page Random Select Line Add a row Delete selected rows Move selected line Move