make relace search string more than once javascript code example

Example 1: replace many chracters js

// You can use regex to do it in only one replace
// Using the or: |
var str = '#this #is__ __#a test###__';
str.replace(/#|_/g,''); // result: "this is a test"
// Or using the character class 
str.replace(/[#_]/g,''); // result: "this is a test"

Example 2: multiple replace

var str = '[T] and [Z] but not [T] and [Z]';
var result = str.replace('T',' ').replace('Z','');
console.log(result);