replacing all , characters from a string javascript code example

Example 1: replacing characters in string javascript

var myStr = 'this,is,a,test';
var newStr = myStr.replace(/,/g, '-');

console.log( newStr );  // "this-is-a-test"

Example 2: replace all character in string javascript

let a = "How to search and replace a char in a string";
while (a.search(" ", ""))
{
   a = a.replace(" ", "");
}
console.log(a);