remove all non number charactesr from a string javascript code example

Example 1: javascript remove non numeric chars from string keep dot

var s = "-12345.50 €".replace(/[^\d.-]/g, ''); // gives "-12345.50"

Example 2: remove non letters from a string javascript

// remove non-letters from a string
function lettersOnly(str) {
	return str.replace(/[^a-zA-Z]/g,"");
   //or return str.match(/[a-z]/gi).join('');
   //or return str.replace(/[^a-z]/gi,""); 
}

console.log(lettersOnly("R!=:~0o0./c&}9k`60=y"));		//"Rocky"
console.log(lettersOnly("^,]%4B|@56a![0{2m>b1&4i4"));	//"Bambi"
console.log(lettersOnly("^U)6$22>8p)."));				//"Up"