the regular express /\D/g identifies all non numeric characters and the following code will replace the letter 'q' and decimal '.' in str and result in 10025
var str = "10q0.25";
var result = str.replace(/\D/g, '');
How can the regex be changed so as to allow the decimal point also and resulting in 100.25 ?
Your solution is almost correct, but it will remove all non-numeric characters. My regex consists of a group or characters, which should remain in string, [ ] is a group of characters to match, [^ ] means group of characters not to match (inverted match), so [^0-9.] means that you want to replace every character except 0 through 9 and . (0-9) with an empty string ''
var str = "10q0.25";
var result = str.replace(/[^0-9.]/g, '');
console.log(result)
