JavaScript

One, JavaScript can be written inside the HTML page, through the tag, such as the bold part of the following code:DOCTYPE HTML>HTML> Head> MetaCharSet= "UTF-8"> title>title> script type= "Text/javascript"> console.log (

The ToString () method in JavaScript is used primarily for objects such as array, Boolean, Date, Error, Function, number, and so on. Here are some of the analytic and simple applications of these methods, and make a discipline to make a

The ECMAScript variable may contain values for two different data types: the base type value and the reference type value.        A primitive type value refers to a simple data segment, whereas a reference type value refers to an object that may

What is the result of the following program?[JavaScript]View PlainCopy var foo = 1; function Bar () { if (!foo) { var foo = 10; } Alert (foo); } Bar (); The result is 10;What about the following

There are 5 simple data types in ECMAscript, also known as basic data types: Undefined, Null, Boolean, number, and string. There is also a complex data type of--object.Undefined typeWhen you declare a variable with VAR but do not initialize it, the

1 functionouter () {2 functioninner () {}3 returnInner;4 }5 6 varA=outer ();7 varb=outer ();8 varC=Newouter ();9 varD=NewOuter ();Question: What are these values?a==b;a.constructor=

1. Basic Data type:String, Decimal, Integer, DateTime, Boolean, and so on.2. Variables:are generic type var, can be stored casually other types of values, can be used directly, not defined, but customary definition. Define variables: var A; all

JavaScript is also an object-oriented language, but it is a prototype-based prototype language rather than a class-based language. In JavaScript, classes and objects don't look much different.Typically, this creates an object:function Person (name) {

Iv. type of function:1. Method of function definition: function declaration: Functions sum (NUM1, num2) {return NUM1 + num2;} function expression: var sum = function (NUM1, num2) {return NUM1 + num2;};//notice there's a semicolon.

Iscroll. js pull-up and pull-down solutions that cannot rebound when refreshing, iscroll. js pull-down I used iscroll. all of my friends who pull up and pull the refresh effect in js should have encountered this problem: In the iOS browser, when

JavaScript code parsing and optimization for the example of the lantern draw activity (2 ). In the previous article, I introduced the code parsing and optimization of the example code for the JavaScript Implementation of the lantern draw activity (I)

JQuery. noConflict () and jquery. noconflict JQuery is currently one of the most widely used front-end frameworks, with a large number of third-party libraries and plug-ins developed based on it. To avoid global namespace pollution, jQuery provides

The css text is automatically omitted when it exceeds the container length !, Css container   When displaying text content to users, we often need to avoid text content exceeding the container width and preventing line feed overflow, the younger

Measure the test taker's knowledge about the operations and features of html css selectors.Child Selector In a CSS style sheet, we sometimes need to make another selection for a selector, for example, to set a style for the label under a paragraph

The FineReport method sorts the clicks based on the number of clicks, and the number of clicks of finereport. When you use FineReport to sort a report, you may want to sort it in ascending or descending order based on the number of clicks. That is

Javascript implements the principle of waterfall stream loading images, and javascript waterfall Let's talk about the principle first:   Function Description: Load different data based on the attribute values of different menus Pull down the

Javascript DIV follows the mouse movement, javascriptdiv First, we will introduce the effect of moving a div following the mouse. The specific code is as follows: Javascript div follows the mouse Now I want to share with you

Dynamically add and delete rows and JavaScript tables based on javascript Another dynamic control table effect, using JavaScript to dynamically generate table rows and table columns, as well as dynamically Delete these columns and rows. After

Dynamically create the JavaScript code of the button and create the javascript code If you don't talk much about it, paste the js Code directly. The specific code is as follows: Document The above is the JavaScript code of the dynamic

High-performance JavaScript Execution and loading; high-performance javascript The browser processes HTML page rendering and JavaScript script execution in a single process, therefore, when the browser encounters the When loading multiple js