javascript book

This book is mainly elaborated from two parts: scope and Closure, this and object prototype.One-scope and closed-packet1-scopeFor JavaScript, most of the time the compilation occurs in a few subtle times before the code executes. Behind the scopes we're talking about, the JavaScript engine is trying to make the best performance possible, such as JIT, which can de

Http://www.china-pub.com/196857 The breadth and depth of JavaScript applications are growing and deepened, and the Javascript skills that need to be mastered in front-end development are becoming increasingly challenging. This new version updates almost all the content of the previous version, and integrates the valuable experience of the author in front-end development over the past few years. It is a

-origin:0 100%; -ms-transform-origin:0 100%; -o-transform-origin:0 100%; Transform-origin:0 100%; } .Dino {Background:url (dino.png) no-repeat; }. Shadow {Background:url (Shadow.png) no-repeat;} JavaScript code (Function (window, document) {var prefixes = [' Webkit ', ' Moz ', ' Ms ', ' O ', '], book = Document.queryselectorall ('. Boo K ') [0], page = Document.queryselectorall ('. Front-cove

that's not var x=1 and function f () {}, which means I delete this.x, delete this.f will be like Deleteobject.prototype, return false?J: Well, it's dripping.R (a restless heart urges it again to dis Mr. JS): Oh, but. I see This.x=1; Delete x returns True, huh?J: Well, yes, because the front this.x is creating a configurable global property, and it doesn't use Var.R (Too young too naive?) No no no continue dis): OK, that was the last time the next door Xiao Wang wrote, why did you report a gramm

1.JavaScript is written in the Unicode character set. The Unicode character set is intended for cross-language, cross-platform communication, which corresponds to one by one of all used text symbols to the computer's binary.2.JavaScript is case-sensitive. HTML is case-insensitive. A special example of this is that the onclick event written in the HTML tag can be written as an onclick, and can only be writte

he is the global scope of } (); Eval (//Temp2 front without var at this time he is the global scope of console.log (temp); Console.log (TEMP1); // Output // Output17. Closure Package: var count=function () { var i=0; return function () { return i++; }} () // here () do not forget to call the Count function immediately from the The function of the Console.log (count ()); // output 0 Console.log (count ()); //

How to compile the message book program? The message book program is not difficult. There are many options to implement it, such as CGI programs. This article describes how to use JavaScript to compile the message book program. The following is a complete example.---- We provide a form containing the name, the email ad

0. Preface: Project Address :https://github.com/vczero/React-Native-App 　　Welcome to issues to discuss any issues, including "fitting room" ....I. Introduction of the ProjectThe main features of the React-native Node Address Book app (1) are: File system-based node. JS service side; Address Book features (category page + List page + Dial-up mailbox mail) Announcement features (List page +

How to compile a message book ProgramWhat about it? The message book program is not difficult. There are many options to implement it, such as CGI programs. This article describes how to use JavaScript to compile the message book program. The following is a complete example. ---- We provide a form containing the na

How to compile the guest book program? Guest Book program is not difficult, there are many options can be implemented, such as CGI programs and so on. This article describes how to use JavaScript to prepare a guest book program, the following is a complete example. ----We provide a form with a name, a guest's e-mail

1: Detailed principle of modulo operation www.stackoverflow.com/questions/4467539/javascript-modulo-int-behaving2: Prototype prototypeA function in JavaScript is an object, a collection of object-time/value pairs, and a hidden connection to a prototype object. Object literals are generated by objects connected to the Object.prototype. The function object is connected to the Function.prototype (the prototype

Use JavaScript to write an add-minus button on the page to achieve the cumulative number of numbers.The abbreviated HTML is probably the case. If you can read it, don't mind the details.1 inputtype= "button"value="+"onclick= "Jia (this)" />2 labelclass= "num">0label>3 inputtype= "button"value="-"onclick= "Jian (this)" />It looks like this.The JavaScript code is as follows1Explain:function Jian (a) andfun

{//map parameter is a function that receives 3 parameters, namely Item,index,array return (item > 2);The condition of the running function}); Console.log (Mapresult); 4,5,8,6 returns a new array consisting of the result of calling this function; Iterating through an array JS iterates through an array in two ways: For loop var num = [5,15,6]; for (var i = 0; i For...in var num = [5,15,6]; for (var i in num) {Console.log (Num[i]

the same date, the number of milliseconds returned is settime () nbsp Set the date in milliseconds, change the entire date getyear () Returns the 2-digit year getfullyear () 4-digit year setfullyear () Set the 4-digit year getmonth () return month setmonth () set month, month must be greater than 0, more than 11 add month getdate () Return Date (1~31) setDate () Set the number of days in the month, if the value passed in exceeds the nu

(a.length); // 1 3 Console.log (a[0]); // 3 4 5 varnew Array (3 6 Console.log (b.length); // 3 7 Console.log (b[0]); // undefined When a floating-point number is passed to the new Array (), an error is directly1 var a = [3.14]; 2 Console.log (A[0]); // 3.14 3 4 var New Array (3.14); // error: test.html:377 uncaught rangeerror:invalid Array lengthThe number of incoming numbers can be:1 var New Array (for each); 2 Consol

parameters of the ECMAScript function as local variables.The execution Environment execution Environment defines other data that a variable or function has access to, determines their own behavior, and each execution environment has a variable object associated with it, and all variables and functions defined in the environment are stored in the object. The code we have written cannot access this object. The global execution environment is not destroyed until the application exits, suc

I think you have seen the effects of reading images. In this article, I will introduce how to implement Javascript. The specific code is as follows. If you are interested, refer to picture.html. The Code is as follows: JS achieves Image book turning

I think you have seen the effects of reading images. In this article, I will introduce how to implement Javascript. The specific code is as follows. If you are interested, refer to picture.html. The Code is as follows: JS achieves Image book turning

After learning Javascript,html,css, get started Phpmysql, read what book?

Learning Object-oriented small examples of books, understanding object classes and object-oriented ideas. Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Function bookdata (BID, bname, bhasout, bprice) {// entity object This. ID = bid; This. Name = bname; This. hasout = bhasout; This. Price = bprice; }; Libary = [ [1, "C # programming", 1,100], [2, "C standard library", 1,200], [3, "network programming", 1,200] ]; Libary. findbookbyid = fun