regex to check string ends with .html code example

Example 1: javascript check if string ends with

function endsWith(str, suffix) {
    return str.indexOf(suffix, str.length - suffix.length) !== -1;
}

endsWith("hello young man","man");//true
endsWith("hello young man","boy");//false

Example 2: how to compare a string with its ending in javascript

function solution(str, ending){
  return str.indexOf(ending, str.length - ending.length) !== -1;
}