JavaScript

　A brief history of JavaScriptJavaScript was released in 1995 by Netscape (Netscape), the first major goal was to deal with some of the input validation operations previously handled by the server-side language in order to improve the user

Town Field Poem:The Pure Heart sentiment wisdom language, does not have the world name and the benefit. Learn water under the hundred rivers, give up arrogant slow meaning.Learn to have a small return to feed root, willing to cast a conscience blog.

javascript: Browser Object-based event-driven scripting language consists of: Javascript:ecmascript (ES) DOM Document Object model BOM Browser object model, three componentsThree ways to use JS 1. HTML tags embedded Js: Point me!!! not recommended

Although I have been doing web site construction for more than 10 years, I've only been learning more about how to use pure JavaScript for work in the last 3 years, rather than always thinking about jquery in the first place. Now I study a lot of

Most OO languages support two types of inheritance: interface inheritance and implementation inheritance, and ECMAScript cannot implement interface inheritance, ECMAScript only supports implementation of inheritance, and its implementation is mainly

To learn JavaScript is not an easy task, and this is one of the barriers, especially in the use of JS for object-oriented development.In fact, it's not easy to get a thorough understanding of this point, and in the book, "You Don't know the volume

there may be times in your application where you need to get content from the user library in order to perform related actions. If you want to get the content in a user library, you need to get to the user library first, get the user library can be

6 basic topics from Uncle Tom's blog: This is the 4th question- print the Fibonacci number using JavaScript (without global variables)Key to solving problems:1, the Law of Fibonacci series2. RecursionThe law of solving the 1:fibonacci sequence of

JavaScript functions define methods,function declarationIn the previous tutorial, you've learned about the syntax of function declarations:function functionname (parameters) { executed code}Function declarations are not executed immediately and

JavaScript prototypes:Each object initializes a property within it, which is prototype (prototype).Prototype chain:When we access the properties of an object, if the object does not exist inside this property, then he will go to prototype to find

Type conversions in JavaScript can be classified as implicit type conversions and explicit type conversions. The dominant transformation is to change the data type directly in the code by means of the method. The common methods are

Usage of 1.JSIn HTML, his position is three places, after Head,body and ..2. Three common dialog boxesAlert ("") alert box, the function is to pop up a warning boxConfirm ("") Select the dialog box, the function is to pop up a selection dialog Click

Why learn JavaScriptOne, you know, why is JavaScript so worthwhile for us to learn?1. JavaScript is supported by all major browsers .2. Currently, most Web pages worldwide use JavaScript.3. It allows Web pages to present a variety of dynamic effects

Loops and closuresFirst Look at a demoDOCTYPE HTML>HTMLLang= "en">Head> MetaCharSet= "UTF-8"> title>Documenttitle>Head>Body> Script> for(varI= 0; I 5; I++) {setTimeout (functiontimer () {console.log (i); }, I* +); }

----------Summary 01. Find DOM element document.getElementById ();//Get a DOM element by IDDocument.getelementsbyclassname ();//Get DOM array by classdocument.getElementsByTagName ();//get DOM array by tag name02. Modify DOM Element dom.type = "Text"

There are three ways to declare variables in javascript: VAR, let, and Const. The following is a description of JS in three ways to define the variable const, VAR, let the difference.variables defined by 1.const cannot be modified and must be

Three types of dialogs commonly used in JavaScriptDifferences and connections between alert (), confirm (), prompt (): 1, alert Box alert ()  alert is a warning box, there is only one button" OK "no return value, warning boxes are often used to

Object literal JSONvar obj = {aaa:999};var json={"aaa": 999, "bbb": 888};"kay": valueObject literal 2?? The definition method and JSON are like, only a little different, the JSON key must be added "";object, An array can also be used as a key

5. Conversion between block elements and inline elements. 1. Conversion between block elements and inline Elements We can use css to solve the conversion between block-level elements and inline elements. This attribute difference between block

Describes how to use the prefetch preload function of the rel attribute in HTML5, html5rel In HTML5, a very useful but often overlooked feature is prefetch. Its principle is:The browser's free time is used to download the content specified by the