typescript vs javascript

One, arrow expression Used to declare anonymous functions, eliminate the This pointer problem for traditional anonymous functions A single line can be omitted {}, multiple lines cannot be saved. var sum = (arg1,arg2) = ARG1+ARG2; Define a lunch function var dosomething = () =>{ Console.log ("Hahahha"); } return even var array = [1,2,3,4]Console.log (Array.filter (value = = value% 2 = = 0)); , eliminating the this pointer problem for traditional anonymous functions

The topic to be discussed today is typescript. Prior to the reprint of a article "The Rise of Typescript" article, today to talk about my feelings. Many friends should know that typescript is an open source language launched by Microsoft to develop large JS applications. Its author is the famous C # Father Anders Hejlsberg. So from the beginning of its beta rele

JavaScript is the typescript code that is available. Exceptions: the WITH () function and the const keyword for firefox. Variable types cannot be changed dynamically Variables that do not use VAR in the variable JS are global variables TS inside this will be an error. TS Global variables need to declare var myvar = 0 at the highest level of the program; Type TS has optional type detection: main type,

Forced type conversions for typescript Converting a number to a string in typescript will cause an error: var a:number = 12345;var b:string = Laygroundsingle.ts (24,18): Error ts2352:neither type ' number ' nor type ' string ' is assignable to the other. This writing is not an error, but there are no eggs to use: var a:number = 12345;var b:string = Console.log (typeof B)"Number" playgroundsingle.js:19:1

From C # to typescript-promise backgroundsI believe that friends who have used JavaScript before have encountered asynchronous callback Hell (callback Hell), n multiple callback nesting not only makes the code read very difficult, maintenance is also very inconvenient.In fact, C # Task before the advent of a similar scenario, the Async Programming mode era, with Action and Func do callbacks are also very po

Modules in JavaScriptBefore learning the Typescript module, let's look at how the modules in JavaScript are implemented.Benefits of the moduleFirst of all, we need to understand the benefits of using modules what? Modular, reusable; encapsulating variables and functions; The following example is a module that is implemented using javascript:1 va

In addition to the customary idea of facing objects, another popular way to create classes from reusable components is to mix simple classes together. You may be familiar with this hybrid approach or have an understanding of the features of the Scala language, a pattern that is popular in the JavaScript community.Mixed caseIn the following code, we show how to mix the model in typescript, after reading the

This article mainly introduces several different characteristics of TypeScript. First, let's take a look at what is TypeScript? TypeScript is an open-source language launched by Microsoft for developing large JS applications. The author is the well-known Father of C #, andshejlsberg. The topic to be discussed today is TypeScr