head first javascript programming pdf

Chapter Javasript Introduction to the first section1. What is JavaScript?An object-oriented, interpretive programming language.Features of the 2.JavaScript. Loose sex Object Properties Inheritance mechanism (prototype based) 3.JavaScript Core Core (ECMAScript) Document Object Model (D

ATL-JavaScript Mixed ProgrammingJavaScript hybrid programming-ATL Last update date: Environment:Windows 8.1 64bit English version, Visual Studio 2013 Professional Update1 English version Prerequisites:Basic concepts of COM Author:KagulaIntroduction ATL (ActiveTemplate Library) is a set of C ++ templates provided by Microsoft to simplify COM programming. This sec

page content asynchronously.With Ajax, you can only update a small part of the page. Other content-logo, navigation, head, foot, no reload.The main advantage of Ajax is that requests to the page are sent asynchronously to the server. The server does not respond to the request with the entire page, it processes the request in the background, while the user continues to browse the page and interact with the page. Your script can load and create page co

can be set only after loading is complete, so you need to mate with the OnLoad event handler. Another method: the Contenteditable property. can be applied to any element so that the element can be edited immediately. Frames, blank pages, and JS are not required "True"/"false"/"Inherit" Operation Rich Text: Document.execcommand (), three parameters: the command name to execute, FALSE, the value required to execute the command. There are many specific commands

exceeds the maximum size limit, the cookie will be silently discarded. Composition of cookies Cookies are composed of the following pieces of information saved by the browser: name, value, domain, path, expiration time, security flag. Cookies in JavaScript There are three types of basic cookie operations: Read, write, and delete.(2) IE user dataIn IE5.0, Microsoft introduced the concept of persistent user data through a cu

Addloadevent (func) {Deposit the existing processing function value into Oldonloadvar oldonload=window.onload;If no function has been bound, add func to itif (!typeof oldonload!= "function") {Window.onload=func;}If the function is already bound, the new function is appended to the endelse{Window.onload=function () {Oldonload ();Func ();}}}DOM Core and Html-dom:getElementById getElementsByTagName getattribute setattribute are Dom Core, they are not specifically

Easy to learn JavaScript 26: How to dynamically add JS scripts and CSS styles in DOM programming LearningThe following HTML document code is used: div Region 1. dynamically load external JS files Code for dynamically loading the external index. js file: alert("I am JS file!"); Code for dynamically loading external JS files: // Dynamically load the external JS file var flag = true; // set true and then lo

DrawImage (): Multiple control modes Shadow Gradient: Createlinergradient ()/createradiagradient (), Addcolorstop () Note the coordinates match. Mode (duplicate image) Createpattern () Working with image data (get Rgba) Getimagedata () Gets the raw image data and returns an instance of the ImageData object. The above objects have width, height, and data properties. The Data property is an array, and each four bits represents a p

and generates a new array OneD.map (e=>e-1) A //simply perform iterative operations -D.foreach (e=>Console.log (e)) -}View CodeMerge Method1 Const c = () ={2 const F = [3,4,5,6]; 3 // accumulate (subtract, multiply, divide) operations on an array and return its results. The callback function has two arguments, the first is the result of the previous element, and the second is the current item 4 f.reduce ((sum,val) =>sum + val); 5

Let add = x=>x+1;//map:: (A-B), [a], [B]let Map= (function(Result,f,arr) {//Closure Store Cumulative ObjectsLet result = []; return functionMap (F,arr) {if(!Array.isarray (arr)) { return"Objects to be processed for array"; } if(Arr.length ==0){ return []; }Else{Let [head,... tail]=arr; Result.push (f (head)); //traversing the target object via a callba

returned by this function will be automatically passed to the next item as the first argument. The first iteration occurs on the second item of the array, so the first parameter is the first item of the array, and the second is the second item of the array.You can use the reduce () method to perform an operation that evaluates the sum of all the values in the array, such as:var values = [1,2,3,4,5]; var sum = values.reduce (function (prev, cur, index, array) { return prev + cur; }); alert

chapter I some basic conceptsHTML (Hyper-text markup language), constructs the static structure of the webpage, consists of a series of Dom;CSS (cascading style sheets), to add style to each part of the page structure;JavaScript, which allows the user to interact with a static web page by acquiring the DOM to add an action to the static structure;DOM, an API (application interface) that dynamically accesses and modifies structures or styles through th

Note 1 Extracts some of the information about JavaScript, its composition, its basic types, and other irrelevant essentials, but the individual still feels that these basics must be understood, after all, better than nothing.And today, there are some questions that sometimes make beginners wonder, such as JavaScript variables, scopes, and memory, especially the scope (C #, Java and other high-level language

The 1th Chapter--Basic articleJS IntroductionHTML page content; CSS Web page style; JavaScript Web page behaviori.e. Hello WorldDOCTYPE HTML>HTML>Head> MetaCharSet= "UTF-8"> title>Documenttitle>Head>Body> Scripttype= "Text/javascript">document.write ("Hello, world!."); Script>Body>HTML>Two ways to use JS:1. :

JavaScript Modular Programming: The use of require.jsFirst, why use Require.js?At the earliest, all JavaScript code was written in a single file, as long as the file was loaded. Later, the code more and more, a file is not enough, must be divided into multiple files, loaded sequentially. The following page code, I believe many people have seen. Thi

Document directory Process file path Fs module Introduction For the list of articles in this series and the translation progress, see Node. js advanced programming: using Javascript to build scalable applications (〇) This document corresponds to the third part of the original article, Chapter 7: Files, Processes, Streams, and Networking: Querying, Reading from, and Writing to Files The article is copi

The following are only personal reading notes, limited to my knowledge limitations, may be biased. Please forgive me for pointing out the problem. 1. The name of this book is "JavaScript DOM programming Art", so what is DOM first?The Dom-document object model, translated literally, is the text object. The Document Object Model (DOM) is a platform-neutral interface that allows programs and scripts to d

JavaScript Modular Programming (III): The use of Require.js Author: Ruan Yi Feng Date: November 7, 2012 The first and second sections of this series introduce JavaScript module prototypes and theoretical concepts, and today we describe how they can be used in combat. I'm using a very popular library require.js. First, why use Require.js. At the earliest, all of

Script Positioning Scripting LocationThe HTML 4 specification indicates, a HTML document and may appear any number of times within each. Traditionally, script> tags that is used toLoad external JavaScript files has appeared in the Other metainformation about the page. The theory is that it's best to keep as many style and behaviordependencies together, loading them first so, the page would come in looking and behaving correctly. ForExampleThe HTML 4 d

.ogg"type= "Audio.ogg"> SourceSCR= "Song2.mp3"type= "Audio.mpeg">Audio player not available.Audio>2. Custom Media PlayerDOCTYPE HTML>HTML> Head> MetaCharSet= "Utf-8"> title>Custom Media Playertitle> Head> Body> Divclass= "MediaPlayer"> Divclass= "Video"> Videosrc= "1.mp4"ID= "Player"Poster= "Image1.png"width= "+"Height= "$">Video Player not availabl