regex no special characters except spaces javascript code example

Example 1: remove special characters from string javascript

var str = "Hello^# World/";
str.replace(/[^a-zA-Z ]/g, ""); // "Hello World"

Example 2: remove all sign that is not a-b in string js

const str = "abc's test#s";
console.log(str.replace(/[^a-zA-Z ]/g, " "));