What is the best way to convert a string in JavaScript to be case-insensitive?

Can anyone assist me?

Challenge: Develop a function called indexOfIgnoreCase which takes in two strings and identifies the first instance of the second string within the first string. This function should be insensitive to letter case. For example, indexOfIgnoreCase("bit","it") and indexOfIgnoreCase("bit","IT") should both return 1.

I have managed to create this working solution; however, I am now facing the challenge of making it case insensitive.

var indexOfIgnoreCase=function(firstString, secondString){
  return firstString.indexOf(secondString);
  var result=indexOfIgnoreCase("bit","it");
  return indexOfIgnoreCase.toUpperCase(); 
}

Answer №2

While this question may have some quality issues, fret not as the solution is here:

const findIndexIgnoreCase = function(str1, str2) {
    return str1.toLowerCase().indexOf(str2.toLowerCase());
}

If you're still in the process of mastering JavaScript, it's worth noting that the initial statement in your code already leads to the end of the function, rendering the subsequent code useless.

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