Find Substring

Find Substring.js

function subStr(str, sub) {
    
    let i = 0;
    let j = 0;
    let collected = '';
    let counter = 0;
    let complete = false;

    while (complete === false) {

        if(str[i] === sub[j]) {
            collected += str[i]
            j++
            i++

            if(collected === sub) {
                counter ++;
                collected = '';
                j = 0;
            }
        }

        else {
            collected = '';
            j = 0;
            i ++
        }

        if(i === str.length) {
            complete = true
        }
    }
  
    return counter
}