javascript calculator source code

Tag:extjs4 source ext.typeof Ext.typeof ()//ext.typeof () is similar to typeOf in JavaScript, except that a simple extension of the type can be seen directly from the source code//Typeof:function (value) {// var type,//typetostring;////if (value = = = NULL) {//RET Urn ' null ';//}////type = typeof value;////if (type =

, or an error occurs during the loading. Web. loadcompleted + = New Loadcompletedeventhandler (web_loadcompleted );} Void Web_loadcompleted ( Object Sender, navigationeventargs E){ // Execute the script function defined in the currently loaded HTML. // The JavaScript method sayhello () without Parameters () Web. invokescript ( " Sayhello " ); // There is a parameter in the JavaScript

function. function Class () {if (! Initializing this. init) {this. init. apply (this, arguments) ;}// set the prototype Class for the subclass. prototype = prototype; // set the constructor Class for the subclass. prototype. constructor = Class; // sets the extend method of the subclass so that the subclass can be inherited by the extend method. extend = arguments. callee; return Class ;}})(); By using the simple-inheritance library, we can implement inheritance in a simple way. Do we find th

Clever 1: Functions Functions are a rare talent in javascript code.It can return code segments and encapsulate relatively independent functions.It can also implement classes and inject OOP ideas.JQuery is a function, and you can also treat it as a class (HA, itself is a class ). Copy codeThe Code is as follows: (function (){ Var jQuery = function (){ // Function

Recently used JavaScript to write a simple calculator, their own testing feel good, first of all to watch the next interface: This is the interface, but what about the function? Now it's just a simple standard calculator that can perform subtraction continuous operations and residual operations. If there is an error with a divisor of zero, the following is a

To recommend a native JavaScript version of the game, source download, the home page as shown in the following figure: First look at how HTML is laid out in the index.html file: Copy Code code as follows: The Index.css files under the CSS folder are as follows: Copy

base64 is "=" by default, and if the parameter is set to a string then the output format is Base64 encoded by default.Hexuppercase Type: bool, whether the hexadecimal encoding of the output is uppercaseFormat type: Hashencrypt.hashformat enumeration type, indicating the output format of ciphertext, optional values are:"Base64" Base64 encoding format, "hex" hexadecimal encoding format, "string" directly convert string format;Hmackey Type: string, optional, computes a hash-based message authentic

This article mainly introduces the JS game's quick run source code details, provides a more detailed explanation of the game's main processes and principles, along with the complete instance source code, for more information, see the examples in this article to describe the quick run

This article mainly introduces the details of the game chess dark chess source code of JS games, analyzes the game source code in more detail, and attaches the complete instance code for your reference, you can refer to the examples in this article to describe the chess and

Google has announced that ScriptCover will be released as an open-source project. ScriptCover is a JavaScript code coverage analysis tool launched by Google. It provides real-time and line-by-line code coverage analysis for Web pages. Google said ScriptCover will eventually be applied to the Chrome browser as an extens

I. Summarize the key points and problems encountered1. Inheritance in javascript. It is recommended that the parent class only provide method sharing, and the attributes should be written to the Child classes of the parent class and the constructor of the Child classes.2. prototype simulate inherited code, which should be written before the definition of all methods. Otherwise, if the prototype object is ch

Analyze the apply and call methods of JavaScript functions from the JQuery source code, jqueryapply $. When the each method is very, suddenly think of $. each ($ ('div '), function (index, entity) {}); where does the index and entity come from and are dispensable, in addition, such a high level tells us the subscript and instance of the current traversal. So let'

Underscore is a JavaScript tool library that provides a complete set of functional programming functions, but does not extend any JavaScript built-in objects. This article mainly introduces the knowledge of underscore source code analysis. If you are interested in learning it together, some people said a few years ago

do is string cutting:Then compare the playback with the current playback in the Listening event:Okay, here we go.7. Vuex State ManagementRecommended official Debugging Tools Devtools ExtensionBefore I saw a lot of people write Vuex, put the entire project data into a state, resulting in the application of all States to a large object. However, when the application becomes large, the store object becomes bloated. So I suggest (personal opinion, light spray): Divide the store into module

We know that after adding the title attribute to some HTML tags, when this tag object is viewed, a small prompt box will pop up when you move the cursor up and display the content defined by the title. The img of the Image Tag also has an alt attribute that can play a similar role. However, it is clear that this prompt box is too monotonous. For this reason, some people use JavaScript to implement a beautiful prompt box effect. This effect is often us

This example describes the code for JavaScript to write a simple calculator. Share to everyone for your reference. Specifically as follows:The screenshot of the running effect is as follows: The specific code is as follows JS Code: A simple

(!operation) return; Result=operatenum (result,num,operation); Setscreen (result); Operation=null; Isreset=false; } } } Third:The use of global variables, the use of global variables to control the progress of local operations. (State control) Copy Code code as follows: var result=0;//calculation results Whether the Var isreset=false;//is reset var operation;//operator

//html LayoutulID= "Tabtitle"> Liclass= "Active">HTML5Li> Li>PhpLi> Li>JavaLi>ul>DivID= "Div1"style= "Display:block">HTML5Div>DivID= "Div2">PHPDiv>DivID= "Div3">JavaDiv>//css StyleJavaScript source codeAfter runningThe above is the way of using JavaScript to switch pages ...Next use jquery to achieve the same functionality!!!ulID= "Tabtitle"> Liclass= "Active">HTML5Li> Li>PhpLi> Li>JavaLi>

No more nonsense, first effect chart: View Demo Source Download Code in JavaScript var spans=document.getelementsbytagname ("span"); var flag=5;//this value arbitrarily take, as long as not 01234 on line var expand=function () {//Extension code, no}; Onload=function () {///loop Load mouse move event for (Var

essentially just a function, it can be invoked in any scope, and a parent constructor can be invoked in a child constructor to achieve simple inheritance. function supertype () { this.colors = {"Red", "Blue", "Green"} } function subtype () { Supertype.call (this); } var instance = new Subtype (); This implementation avoids the problem of multiple instances sharing properties, but there are new problems, such as inability to share functions, and instance instanceof supertype t