TypeScript Part 1: DataTypes and Array

TypeScript is an open source, cross platform and  strongly typed super set of  JavaScript. TypeScript can be  transcompiled into ES5, so that it can be used along with HTML.

TypeScript Data Types

var sName: string = 'Shalvin';
alert(sName);

ES5

var sName = 'Shalvin';
alert(sName);

let

let can also be use to declare memory variable. let can be used to circumvent “hoisting”.

let sName: string = 'Shalvin';
alert(sName);

Tryout


TypeScript Array

var myArr: Array<number> = [1, 2, 3];
for (let n of myArr) {
    alert(n);
}

JavaScript

var myArr = [1, 2, 3];
for (var _i = 0, myArr_1 = myArr; _i < myArr_1.length; _i++) {
    var n = myArr_1[_i];
    alert(n);
}