Javascript Regular Expression:lastindex property of Regular Expression

We can loop over matching parts of string in RegExp.test & get lastindex

var str = "Javascript is an interesting scripting language";

var re = new RegExp( "script", "g" );

var counter =1

while(re.test(str)){

console.log("Test "+ counter+" - Current Index: " + re.lastIndex);

counter++

}

Output:

Test 1 - Current Index: 10

Test 2 - Current Index: 35