asserts if string contains another string

containsString.js

function checkstring(str) {
    let pointer = 0;
    let len = str.length
    let smileCount = 0
    let smileyBank = []
    while (pointer < len - 1) {
        const currentSymbol = str[pointer]
        const nextSymbol = str[pointer + 1]
        if (currentSymbol === ":") {
            console.log(currentSymbol, nextSymbol)
            if (nextSymbol === ")") {
                smileCount++
                pointer = pointer + 1
                smileyBank.push(currentSymbol + nextSymbol)
            }
        } else if (currentSymbol === "(") {
            console.log(currentSymbol, nextSymbol)
            if (nextSymbol === ":") {
                smileCount++
                pointer = pointer + 1
                smileyBank.push(currentSymbol + nextSymbol)
            }
        }
        pointer++
    }
    console.log(smileCount)
    console.log(smileyBank)
}

function containsString(string1, string2) {
    let charArray1 = string1.split('');
    let charArray2 = string2.split('');
    
    let leftPointer = 0;
    let rightPointer = charArray2.length - 1
    let matchCounter = 0;

    while(rightPointer < charArray1.length) {
        for (let i = leftPointer; i < rightPointer + 1; i++) {
            const arr2Counter = i - leftPointer
            if (charArray1[i] === charArray2[arr2Counter]) {
                matchCounter++
            }
            if (charArray2.length === matchCounter) {
                return true
            }
        }
        leftPointer++
        rightPointer++
    }

    return false
}

// console.log(containsString("applegate", "gate"))