Strip all non-numeric characters from string in JavaScript

Question

Consider a non-DOM scenario where you\'d want to remove all non-numeric characters from a string using JavaScript/ECMAScript. Any characters that are in range 0 - 9

Answer 1

we are in 2017 now you can also use ES2016

var a = 'abc123.8';
console.log([...a].filter( e => isFinite(e)).join(''));

or

console.log([...'abc123.8'].filter( e => isFinite(e)).join(''));  

The result is

1238