replaceall vs regular expression javascript code example

Example 1: string replace javascript

let re = /apples/gi; 
let str = "Apples are round, and apples are juicy.";
let newstr = str.replace(re, "oranges"); 
console.log(newstr)

output:

"oranges are round, and oranges are juicy."

Example 2: javascript replaceall

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