JavaScript Base empty string: String type, turn to bool type is: false Boolean () system function

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JavaScript base bool type variable converted to character String ()

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 base bool type variable converted to numeric number ()

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 base empty string converted to numeric type number ()

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 base null is converted to numeric number ()

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.

The JavaScript base = = = All equals comparison operator compares the values of two variables and compares the types of two variables

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.

JS Advanced Programming Third Edition--javascript introduction

 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

JavaScript Advanced Object-oriented (13)--The execution procedure of the constructor function

Tag: It's called ASC initialization operator ext Process Object-oriented whatDescription (2017-4-2-21:50:45)What is the function of the constructor:1. Initialize the data.2. To add attributes to the object in JS, initialize the attribute value

JavaScript base output string with double quotes/single quotes

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.

WIN10 series: JavaScript gets a list of files and folders

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

JavaScript Concise tutorial (5) Conditional judgment

JavaScript uses the if () {...} or else {...} To make conditional judgments. For example, depending on age, you can use the if statement to achieve the following:[JavaScript]Plain Text view copy code ? 001002003004005006 var

JavaScript Object-oriented Programming (II): Inheritance of constructors

NanyiDate: May 23, 2010The first part of the series focuses on how to "encapsulate" data and methods, and how to generate instances from prototype objects.Today's introduction is about five ways to "inherit" between objects.For example, there is now

JavaScript Basics-variable-operator-flow control statements

JavaScript compositionA complete JavaScript implementation is made up of the following 3 different parts:ECMAScript: Describes the grammar and basic objects of the language;The Document Object model, or DOM, is a description of the methods and

The function expression of "JavaScript"

Today, the main review of the "JavaScript Advanced program" function expression in this chapter, mainly their own closure and this concept or not clear, resulting in a small demo when this piece of the completion of ignorance, first do a knowledge

JavaScript operators and expressions

  JavaScript expressionsExpressions are formulas that are used to evaluate JavaScript scripts when they run, and can contain constants, variables, and operators  JavaScript operators1, arithmetic operators: + 、-、 *,/,%, + + 、--; note (as long as one

60 lines of JavaScript code Tetris

I have long heard that someone on the internet just wrote a Tetris game with 60 lines of JavaScript code, and recently looked at it, and today in this article I have done my analysis (mainly in the form of annotations).  I use C to write a basic

I understand the implicit type conversion of JavaScript.

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

The difference between const, var, let-defined variables in javascript

Reprinted from Http://www.cnblogs.com/ksl666/p/5944718.htmlConst,var,let Differences in JStoday, for the first time, a const-defined variable was encountered, and the article was collated with relevant Data. The main content Is: JS in three ways to

Loading and execution of "turn" JavaScript

To undertake the previous article, "browser rendering principle introduction", This article to the next JavaScript loading and Execution.In general, browsers have two main features for JavaScript operation:1) execute immediately after loading2) will

Something about the value of the hyphen in Javascript.

This day saw the front-end online on the topic of js, one of the topics is very interesting. As follows1 var a = b =10; 2 (function() {3 var a = b = +; 4 })(); 5 Console.log (a); 6 Console.log (b); 7 Q: What is the output of a =?

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