replace all - with / in javascript code example

Example 1: javascript replace all occurrences of string

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");

Example 2: javascript replace all with variable

/**
*A better method for replacing strings is as follows:
**/
function replaceString(oldString, newString, fullString) {
  return fullS.split(oldS).join(newS)
}
replaceString('World', 'Web', 'Brave New World')//'Brave New Web'
replaceString('World', 'Web', 'World New World')//'Web New Web'