TypeScript 2.x By Example

Functions in TypeScript

The next function in our file is a window.onload function which is called when the browser is loaded.  The window.onload function is a standard JavaScript function and here is a good example of TypeScript being a superset of JavaScript. All JavaScript functions can be used directly in TypeScript. In the window.onload function, we just attach the event listener to the add button:

window.onload = function(){    let name= <HTMLInputElement>document.getElementById("todoName");    let description = <HTMLInputElement>document.getElementById(                       "todoDescription");    document.getElementById("add").addEventListener(      'click',()=>toAlltask(name.value, description.value)); }

TypeScript allows us to type cast one type of value to another ...