String object to number Typescript

Question

Lets say, I have a string like "150 test". How can I convert this string to a number with the value of 150?

Thanks

Answer 1

Typescript supports type casting, which you will need in your case if you have your variable types declared.

You simply just want to achieve something like this in JS.

var result = parseInt("125 test");
// result is 125

So, it's possible to cast like follows in typescript,

let msg: String = "125 test";

// If 'msg' is 'String', cast it to 'string' since 'parseInt' argument only accepts 'string'.
let result: Number = parseInt(<string>msg);
// result is 125

This will then be transpiled into js, like;

var msg = "125 test";
var result = parseInt(msg);