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Define map function Map () {this.container = {};} Put Key-value into Map Map.prototype.put = function (key, value) {try {if (key! = NULL && Key! = "") this.container[ Key] = value;} catch (e) {return e;}};/ /Remove the corresponding value from the

All along, all kinds of JS best practice will tell us that JS is placed in the end of the HTML, that is /body> , the reason is: JS will block the download, and, in JS is likely to have the operation of the DOM, put in the end of the HTML, as far as

Define Mapfunction Map () {this.container = {};} Put Key-value into map Map.prototype.put = function (key, value) {try {if (key! = NULL && Key! = "") This.container[key] = value;} catch (e) {return e;}};/ /Remove the corresponding

AJAX is a technology used to create fast dynamic web pages. By performing a small amount of data exchange with the server in the background, AJAX can implement asynchronous updates on webpages. This means that you can update a part of a webpage

If the keyword Error is used for an exception, we can create an exception instance like a new common object. var err = new Error ("this is an exception"). The attribute of the exception is as follows: description: error description fileName:

A floating point error occurs during the fractional Multiplication operation in JS. You can test the problem as follows: The result is 251.89999999999998 instead of 251.9. This problem may be a headache for many people. How can this problem be

// Create a label by defining the Method//*************************************//Copy codeThe Code is as follows:Var createLabel = function (id, name, value ){Var label_var = document. createElement ("label ");Var label_id = document.

360 plug-in solution RePlugin learning: resource sharing, 360 replugin I did not write this, but later I found it still had a pitfall. 1. Use "plug-in" Resources 1. Check whether the "plug-in" is installed. If it is not installed, install the "plug-

1. js Method/*judging the browser name and version can only be judged: ie/firefox/chrome/opera/safari2012 May 16 23:47:08 browser kernel ua:ua; browser kernel name: nv.name; browser kernel version: nv.version; browser shell name: Nv.shell;*/varNV = {

Github: https://github.com/hirokidaichi/namespace-jsDefine the Namespace object:Var NamespaceNow let's take a look at the definition of the Namespace object. It is a NamespaceDefinition object. This Object is a function Object (the constructor of

In JavaScript you can use Try...catch to do exception handling. For example: try {foo.bar ();} catch (E) {alert (e.name + ":" + E.message);} The system anomalies we may get now include the following 6 types: evalerror:raised When an error occurs

This article mainly introduces how to solve the floating point computing BUG in js. If you need it, you can refer to it and hope to help you with projects that have been used in the past, I found this code on the Internet before, but there will

Problem Introduction: Today at the front desk JS processing two numbers multiplied by the accuracy of the deviation: 1.2*3=3.9999999995, it should have been 3.6. Baidu a bit, found that this is a JS floating point operation of a bug. On the internet

Ajax transmits parameters to XMLHttpReq. onreadystatechangePass:Xmlhttp. onreadystatechange = function () {xx (123 )};Or xmlhttp. onreadystatechange = new Function ("xx (123.Copy codeThe Code is as follows:Ajax transmits parameters to XMLHttpReq.

Rss. jsCopy codeThe Code is as follows:// Control IDFunction getId (objId ){Return document. getElementById (objId)}// Link corresponding array, please indicate Reprinted from http://www.cnrui.cn/blogFunction urlArrary (urlName ){Switch (urlName

Before, I always like to use Console.log (do some thing) to perform the output type and value, want to see the popup immediately, it will be directly in the browser alert (), these are the basics.A little more complex, it is necessary to use the

Open the solution,Find the FileBrowser/FileWorkerBase. cs FileCopy codeThe Code is as follows:Response. write (@ "(function () {var d = document. domain; while (true) {try {var a000000000000top.opener.doc ument. domain; break;} catch (e) {}; d = d.

a JS floating point calculation problem solution:1. Using the numberobject.tofixed (num) methodThe ToFixed () method rounds numbers to a number that specifies the number of decimal digits.2. Calculate floating-point numbers more accuratelyNote: the

Information Source: icyfoxAuthor: Ice Fox prodigal son (Test page: http://www.godog.y365.com/runexe/icyfox.htm. the program running here is not a Trojan !) To create a perfect ie webpage Trojan, we must first develop a perfect standard for us. I

I have been working on javascript recently and it is inevitable to parse xml files. So I found many examples on the Internet and found that it is indeed better than what I wrote: 1) My original parsing class: JSDomParse /*** Description: JSDomParse