Group anagrams

JavaScript

function anagramCheck( s1,  s2) { 

if(s1.length ! == s2.length) {

	return null;
}
  const s2Array = s2.split('');
  console.log(s2Array);
for( let i=0; i<s1.length ; i++) {
 let letterfound = false;
   for( let j=0;j<s2Array.length; j++){
   
    if(s1[i] === s2Array[j] ){
    	 letterfound =true;
       s2Array[j] = null;
       break;
   }
  
  }
  }
  


}