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Content, and so on, while the Web worker runs in the background.Note:the DOM cannot be manipulated asynchronously! WebWork cannot be used locallyHTML5 WebWork method of Use : http://www.cnblogs.com/yxlblogs/p/3896786.htmlWebwork.htmlTask.jsOnMessage = function (event) { var num = event.data; var result = 0; for (var i = 0; i If you feel that reading this article is helpful to you, please click " recommend " button, your "recommendation" will be my biggest writing motivation!"

naturally not bound to MyObject Object.Listing 8. Callback.jsButton.onclick = Myobject.handler;This is a common mistake that JavaScript novices often make, and in order to avoid this error, many JavaScript frameworks provide a way to manually bind this. Dojo, for example, provides Lang.hitch, which takes an object and function as arguments, returns a new function, and executes the this binding on the incom

Operation:$date (D, "Yyyy-mm-dd hh:mm:ss"); $date = function (date, formatString) {...} $formatFloat = function (Num,type) {...}//Of course there are some more details on date or number aboveHttp,ajax Operation:$ajax (opt), or the operation of the Url,params//or provide, load JS callback $loadJs: function (file, callback, CharSet) {.}//JSONP: callback ({" Name ":" Tom "}) $asynJSON: function (file, MethodName, Callback, CharSet) {...}Action on the event:$on, $off, $once, $fire, $fixEvent//mobi

, while other browsers use the dynamically inserted Some of the code below1Window.onload=function(){23 VarI=0,4Max=0,5O=Null,67//List of stuff to preload8Preload=[9 ‘http://tools.w3clubs.com/pagr2/‘,10‘http://tools.w3clubs.com/pagr2/‘,11‘http://tools.w3clubs.com/pagr2/‘12],13Isie=Navigator.appName.indexOf (‘Microsoft‘)===0;1415For(I=0, Max=Preload.length; IMax I+=1){1617If(Isie) {18NewImage (). src=Preload[i];19Continue;20}21stO=Document.createelement (‘Object‘);22O.data=Preload[i];2324//IE stuf

foreach is a method of manipulating an array in ES5, and the main function is to iterate through the array, for example:1 var arr = [1,2,3,4]; 2 Arr.foreach (alert);Equivalent to:1 var arr = [1, 2, 3, 4]; 2 for (var k = 0, length = arr.length; k ) {3 alert (array[k]); 4 }The function callback in the Foreach method has three parameters: the first argument is the array contents of the traversal, the second parameter is the corresponding array index, and the third parameter is the array itselfSo:

(Jsselectisexititem (Objselect, Objitemvalue)) { For (var i = 0; i if (Objselect.options[i].value = = Objitemvalue) { Objselect.options[i].text = Objitemtext; Break ; } } Alert ("successful modification"); } Else { Alert ("The item does not exist in this select"); } } 6. Set the first item of text= "Paratext" in Select to be selected function Jsselectitembyvalue (Objselect, Objitemtext) { //Determine if there is var isexit = false; For (

);}Press F12 (or Ctrl+shit+i) under Chrome to switch to the network page, and you can see that the Alert.js file has been downloaded but does not perform the action that pops up the Hello,world dialog box. Then we use "tied to specific events" in the way, because the browser side has a cache, will not download the Alert.js file from the server, so that the execution speed can be Guaranteed.We can also use Ajax methods, such as:var New XMLHttpRequest (); xhr.open (' GET ', ' new.js '); xhr.send (

-threaded, so although the browser can speed up the JS download, but must be executed in turn. So the image image resources in chrome can be downloaded concurrently, but the external JS file concurrent download does not make much sense.There are two ways to implement non-blocking JS (non-blocking JavaScript): 1. HTML5 2. Dynamic Loading JSThe first option is to HTML5 the defer and async Keywords:DeferAsyncT

We begin to explain the role JS plays in HTML. for the Internet and the Windows operating system, JavaScript means the future. (1) JavaScript: Writing HTML outputInstance code:The result of the operation is:Tip: You can only use document.write in HTML output. If you use this method after the document is loaded, the entire document is overwritten.(2) JavaScript: R

(Turn: God knows the column) JavaScript debugging, is the development of WEB applications, especially AJAX application is very important, the current debugging of Javascript a lot of tools, I prefer to use is Firebug. Firebug is a powerful web development tool developed by Joe Hewitt that integrates with Firefox to edit, debug, and monitor any page's CSS, HTML, a

and would always stay the this. "-JshintUsagectrl+jOn OS X or on alt+j linux/windowsIf you would like to having Jshint run anytime you save a JavaScript file (highly suggest this), you'll need to install th E sublimeonsavebuild package.JavascriptnextHttps://github.com/Benvie/JavaScriptNext.tmLanguageThis plugin was a better syntax highlighter for JavaScript. Does it improve syntax highlighting for current

JavaScript Regular Expressions To be able to read carefully is a review and promotion of JavaScript, can be a good test basis.　　JavaScript variables　　　JavaScript operatorsJavaScript arraysJavaScript process statementsJavaScript String functionsJavaScript Function BasicsJavaScript Base DOM OperationsJavaScript

Objectatindex:2] Delegate:self Cancelbuttontitle:nil otherbuttontitles:@"OK", nil]; [Alert show]; } return NO; } return YES; } See the code is not clear enough to understand it? I think PhoneGap may have done so, not studied. But there is an open source project that you can look at, which allows JavaScript to invoke the Objective_c method. Call Jsbridge-to-cocoa.http://code.google.com/p/jsbridge-to-cocoa/There are two other relate

JavaScript debugging, is the development of Web applications, especially AJAX application is very important, the current debugging of JavaScript a lot of tools, I prefer to use is firebug. Firebug is a powerful web development tool developed by Joe Hewitt that integrates with Firefox to edit, debug, and monitor any page's CSS, HTML, and JavaScript in real time. T

JavaScript Learning Summary (i)--javascript FoundationJavaScript Learning Summary (ii)--The logical NOT operator is detailedJavaScript Learning Summary (iii)--a logical AND operator explanationJavaScript Learning Summary (iv)--a logical OR operator explanationJavaScript Learning Summary (v) the difference between = = and = = in--javascriptJavaScript Learning Summary (vi)--

Scope of a variable To understand closures, you must first understand JavaScript's special variable scope. The scope of a variable is nothing more than two kinds: global and local variables. The special point of the JavaScript language is that the global variable can be read directly from within the function. Copy Code code as follows: var n=999; Function F1 () { alert (n); } F1 (); 999 On the other hand, local variable