如何删除字母和特殊字符形式的字符串

Question

My input is string contains character and special symbol, I need only numeric value output so how can we do that using Node JS. const myInput = "56,57FS+2d" //desired output is 56,57

For character not fixed with FS it will be change. Thanks in advance.

Answer 1

Use regex /[a-zA-Z](.*)/g

 const myInput = "56,57FS+2d"; console.log(myInput.replace(/[a-zA-Z](.*)/g, ''))

Answer 2

Try this, this will select all numbers and , and remove everything after + (here +2d ).

 const myInput = "56,57FS+2d"; console.log(myInput.replace(/[^0-9,][^+]{0,}/g, ""));

Output:

56,57

Answer 3

 const myInput = "56,57FS+2d" var numb = myInput.match(/\\d/g); numb = numb.join(""); console.log(numb)