NodeJS从字符串中提取数字

Question

I have this string wn123456 kg for example

I would like to take out only the numbers in this case: 123456

Answer 1

Use this one - /\\d+/g . It will extract the number.

 const str = 'wn123456 kg'; console.log(/\\d+/g.exec(str)[0]); 

Answer 2

var str = 'wn123456 kg';
var num = str.replace(/\D/g, '');
console.log(num);

Answer 3

You can do this: using match

 var text = 'wn123456 kg'; var number = text.match(/\\d+/); alert(number); 

using replace

 alert('wn123456 kg'.replace(/\\D/g, ''));