JavaScript

(function() { var x=foo (); var foo=function foo () { return ' Foobar ' }; return x; }) ();This code runs after the error: Uncaught Typeerror:foo is not a functionThe reason is that the declaration of the

1. OverviewIn addition to the normal operating mode, ECMAscript 5 adds a second mode of operation: "Strict mode" (strict). As the name implies, this mode allows JavaScript to run under stricter conditions.2. Why use Strict mode-Eliminate some of the

The first chapter:1.DOM: is a set of methods for abstracting and conceptualizing the content of a document, which is an API.2.W3C definition of DOM: An excuse that is independent of the system platform and programming language programs and scripts

I believe many people have used export, export default, import, but what is the difference between them?In JavaScript ES6, exportand export default can be used for exporting constants, functions, files, modules, etc., which you can import+(常量 | 函数 |

4.2.3 FunctionA function is a special type of data that is actually an object.4.2.3.3 call () and apply ()1. In JavaScript, each function has a call () and an apply () two methods.The two features of these two

/*javascript: Used to write effects on the page, and HTML, CSS is the same browser parsing JavaScript language: First, JS how to run (Javascript,jscript,vbscript,applet ... Second, the output alert (what type can be); You can do debugging with

Java has class files, Python has import keywords, Ruby has require keywords, C # has a using keyword, PHP has include and require, CSS has @import keywords, but for ES5 version of JavaScript , JavaScript introduces code through script tags in a

A TD Input (save button) binding method, click the button to save all the data on the linefunction Locationedit (num) {var ordernumber= $ ("#" +num). Parent (). Parent (). Find ("TD"). EQ (1). text (); var ItemNumber= $ ("#" +num). Parent (). Parent

DOCTYPE HTML>HTML>Head> title>Test013_array_prototype_unique ()title> Head>Scripttype= "Text/javascript">Array.prototype.unique= function() { vara= {}; for (varI= 0; I This. length; I++) { if (typeofa[ This[i]]==

ProblemIn JavaScript, where integers and floating-point numbers belong to the Number data type (one of the simple data types), we often find that the result of printing 1.0 such a float is not 1 1.0 , because the memory space that holds the floating-

The original Published time: 2008-10-13--from my Baidu article [imported by moving tools]. How do I access C # functions in JavaScript?2. How do I access C # variables in JavaScript?3. How do I access the existing variables of JavaScript in C #?4.

In JS, the allocation of required memory and the recovery of useless memory are fully realized automatically . Garbage collection mechanism principle: to identify those variables that are no longer used, and then release the memory they occupy, the

Using name as the variable name (var name = ") does not cause a bug in IE (IE9), causes a bug in chrome but does not specify a naming error, but reports other errors, so it is not easy to find.In JavaScript, name is neither a reserved word nor a

The CSS attribute visibility and opacity are used to replace the jQuery events that the mouse passes by. visibilityjquery I have been using jQuery's hover () function to write the mouse over the event. In the past few days, I found that other

The BootStrap Fileinput upload plug-in uses the instance code, bootstrapfileinput 0, 1. Introduce js and css (it is recommended that css be placed in the html header and js be loaded at the bottom of html) 2. html // The multiple upload button

> CSS 3_animation _ of my agent series slides out to the right and then slides down and stops. css3_animation The beginner hasn't officially published anything yet. It's all about decorating the blog home. It hasn't been renovated yet .. After

Static carousel images and static carousel Images 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 >26 27 28 1 *{ 2 margin:0px; 3 padding:0px; 4 list-style-type:none; 5 } 6 #dlunbo{ 7 width:500px; 8 height:330px; 9

About transition and animation in css3, css3transition ** After a long project, the transition and animation css3 attributes are often used in actual projects. As follows:   1: first introduce transition: A. This is often the case in projects. For

Stylish-one-click skin change for Web pages, changing the font size, removing ads, stylish font size Today we will introduce a very useful plug-in, stylish.Stylish is a plug-in that can customize themes for websites. It can be found in the chrome

CSS3 media query summary and CSS3 media Summary 1. What is media query? Media queries allow us to set CSS styles based on the characteristics of a device's display (such as the display width, screen ratio, and device direction, A media query