var string = "golden vigor doers goat";
var replacedString = string.replace("go", "GO");
console.log(replacedString);

var str = "Please locate where 'locate' occurs!";
str.replace("locate", "W3Schools"); //replace only replace first match from string
str.replace(/LOCATE/i, "W3Schools"); // i makes it case insensitive
str.replace(/LOCATE/g, "W3Schools"); // g replace all matches from string rather than replacing only first

const p = 'Its going to rain today and its going to rain tomorrow';
// Example of replacing all occurrances
// g = global search, which searches all instances
// i = case insensitive, which will match 'a' with 'A'
const regex = /rain/gi;
console.log(p.replace(regex, 'snow'));
// expected output: "Its going to snow today and its going to snow tomorrow"
// Example of replacing the first occurance
console.log(p.replace('rain', 'snow'));
// expected output: "Its going to snow today and its going to rain tomorrow"

//Replace the first match in a string
//If you wish to replace all matches, use the replaceAll() method.
var str = "JavaScript replace method test";
var res = str.replace("test", "success");
//res = Javscript replace method success