javascript definitive guide

Javascript Learning Guide 1---0Chapter 2 variables and scopes I hope you can review the previous content if you forget it.Today, let's talk about the variables and scopes.This chapter describes the basic types and reference types of execution environment garbage collection (you can understand). The basic types and reference types of JavaScript may contain two dif

Chapter I. JavaScript overview　　Top three skills:　　　　 HTML: Describing the content of a Web page　　　　 CSS: describing Web page styles　　　　 JavaScript: describing Web page behavior　　　　Features: dynamic, weak type, suitable for object-oriented and functional programming stylesSyntax originated from JavaThe class function comes from SchemePrototype-based inheritance comes from selfname and version:　　　　　

this point, the response has been fully received.iv.onreadystatechange EventsThe ReadyState attribute holds state information for XMLHttpRequest. Every time readyState changes. The onReadyStateChange event is triggered.The onreadystatechange property can specify a function that is called when the state changes.The function often determines the detailed state of the response with the Readystate/status/statustext propertyXmlhttp.onreadystatechange=function () { if (xmlhttp.readystate==4 xmlhtt

, such as Rhino Book (JavaScript authoritative guide). W3school can tell you only JS is probably what. But the next thing you need to know is what JS really is. The Rhino book acts as the role. Rhino Book covers a wide range, and the content is very full, you can open the whole JS world. Of course because the Rhino book is thicker, and look at the time you do not have the means to do something immediately,

Find multiple elements by ID function getelements (/*ids...*/) {var elements = {};for (var i=0; i　　JavaScript authoritative Guide to learning notes

seems to be no problem, but! Why is the variable times placed outside, used once on the outside, naming conflict what to do, or in case of changes in the outside how to do.This time, an event listener code would be a little more awesome.foo.addEventListener(‘click‘, (function() { var times = 0 return function() { times++ console.log(times) }})(), false)How, is not immediately feel the same. A moment of forcing the grid up!By creating a closure, the times package is encaps

The occasional blog, see I have written "JavaScript authoritative guide" 第6-8 chapter notes, although it is extremely simple, but also my efforts. But I do not remember what I saw before, so I decided to read the book again, took 5 days, finally finished reading the first 8 chapters, important moments need to be remembered. 650) this.width=650; "src=" Http://img.baidu.com/hi/jx2/j_0039.gif "alt=" J_0039.gif

! Why is the variable times placed outside, used once on the outside, naming conflict what to do, or in case of changes in the outside how to do.This time, an event listener code would be a little more awesome.foo.addEventListener(‘click‘, (function() { var times = 0 return function() { times++ console.log(times) }})(), false)How, is not immediately feel the same. A moment of forcing the grid up!By creating a closure, the times package is encapsulated inside and then returned to the function.

On September 14, July 30, a "cloud-based JavaScript roaming Guide" was introduced at the JavaScript event w3ctech in Guangzhou, essentially a Node. js getting started lecture. It is hoped that through this lecture, front-end engineers familiar with JavaScript will try to use Node. js to develop some applications and ex

Javascript:1. Object-oriented, interpretive (non-compiled) programming language. A scripting language2. Loosely typed language. A variable does not have to have a definite type. Property names in an object can be mapped to any property value3. Raw data type: Numeric, String, Boolean; built-in support: array, date, regular Expression object4. The client's javascript:javascript is embedded in the HTML Web page, and the script is run by the client comput

(funcs[5] ())//5//these closures are defined in the same function call and can share the variable ifunctionConstfuncs () {varFuncs = []; for(vari = 0; I ) Funcs[i]=function() {returni;}; returnFuncs;}varFuncs =Constfuncs (); Alert (funcs[5] ())//Tenfunction properties, methods, and constructorsLength PropertyPrototype propertyCall () apply () methodBind () method binds a function to an objectToString () methodfunction () constructorYou can pass in any number of string arguments, and the text o

is a fool's title, in fact, this book spent a lot of content to explain the basic syntax of JS, Bom,dom, Events, Ajax (this and many JS book the same). The final chapter is programming patterns and design patterns.I don't think it has much to do with object-oriented, prototype and inheritance, it does mention, but not much (to see, or should see, the JavaScript Advanced Program (third edition)).The final chapter of the design pattern is good, Factory

not equal for each index exactly equal)Object comparisons are reference comparisons, and are equal only if they refer to the same object(This is similar to the fact that the name is the same as the age but not the same person, but if the person has a nickname (other references) then the nickname and his name all refer to him alone)var O1 = {name: ' Zhang ', age:23};console.log (O1); // Output Object {x=1, Y=1}var O2 = {name: ' Zhang ', age:23};console.log (O1); 　　　　　　// Output Object {x=1,

1. Using Unicode encoding2. JavaScript has: function classes (functions), array classes (arrays), error classes (Error), regular classes (REGEXP), date classes (dates)3. A piece of code showing the system time: var t = new Date (), var t1 =t.getfullyear () + "Year" +t.getmonth () + "month" + t.getdate () + "Day" + t.gethours () + "when "+ t.getminutes () +" min "+ t.getseconds () +" seconds "; alert (t1);4. Javascrip prohibit octal5.2 square root math

This is a very long blogFinally the authoritative guide to buy back, has been hesitant, first: The book is too thick, afraid to buy can not insist on reading. Second: Feel too expensive, at least 100 ￥. Now the internship can also pay a little salary, set a volunteer for themselves: the one-month salary for the purchase of books. It's not too much of an expense to buy a 100￥ book. Good! Buy! In order to insist on reading, I will send reading notes to

I. Object-oriented technology in JavaScript (solving how to use the fatigue in JS programming)1. Examples of collection classesThe collection represents a non-repeating unordered collection. Two basic methods: A. Add to Collection B. Whether in the collection.　　　　Reference: p218 set.js2. Enumeration examplesEnumeration represents a limited set of values.　　　　Examples of PokerTwo. Standard conversion method1. toString (); Tolocalstring ();2. ValueOf ();

This article mainly introduces the jQuery-based JavaScript template engine JsRender User Guide. For more information, see the following introduction. JsRender is a jQuery-based JavaScript template engine with the following features: · Simple and intuitive · Powerful functions · Scalable · Lightning fast These features seem very powerful, but almost every templat

Javascript Learning Guide 0---2 Okay. Pretty girls have read it. Let's continue with the content of the last lecture (the content of the previous section)Control statement: First, I would like to sum up a total9 Expires/expires + CgogaWYg0 ++ expires/Cw + bAtLfWsfDOqtXivLi49r/Y1sbT777kvtm49sD919MKPHA + expires = "brush: java;"> var I = 10; if (I> 15) {alert ("I> 15")} else if (I Var I

through arguments. Chestnuts:function f( ){ return arguments;}f(1,2,3); //[1,2,3]2. Although arguments looks like an array, it is actually an array-like object. It is similar to the array because it also contains the index element and the length property. But the similarity ends here, because arguments does not provide array methods like sort (), slice (). But we can convert the arguments to an array so that it can be used in a variety of arrays.Example: function f( ){ var

Fifefox, F12 is used to wake up the Fifebug Control Panel, ctrl+shift+j to wake up the error console, in the browser, you can use Console.log () to output messages to the console, You can also pop a dialog box by passing in a text to the alert () function, but this output debugging method is more intrusiveYou can manipulate HTML content and CSS styles in your Web browser through JavaScript, and you can also use time handlers to define the behavior of