how replace in js code example

Example 1: javascript replace string

var str = "JavaScript replace method test";
var res = str.replace("test", "success");  
//res = Javscript replace method success

Example 2: javascript replaceall

//as of August 2020, not supported on older browsers
str.replaceAll("abc","def")

Example 3: replace all javascript

str.split(search).join(replacement);