replace all character in string javascript

function replaceAll(str, find, replace) {
    var escapedFind=find.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
    return str.replace(new RegExp(escapedFind, 'g'), replace);
}
//usage example
var sentence="How many shots did Bill take last night? That Bill is so crazy!";
var blameSusan=replaceAll(sentence,"Bill","Susan"); str = str.replace(/abc/g, '');let a = "How to search and replace a char in a string";
while (a.search(" ", ""))
{
   a = a.replace(" ", "");
}
console.log(a);str.split(search).join(replacement);