<script type="text/javascript">
    function bracketValidator(input){
        const splittedInput = input.split('')
        const length = splittedInput.length
        let depth = 0
        if(length % 2 !== 0) return false

        for(let i = 0; i < length; i++){
            // if(splittedInput[i] !== '{' || splittedInput[length-(i+1)] !== '}'){
            //     return false
            // }
            if(splittedInput[i] === '{'){
                ++depth
            } else if(splittedInput[i] === '}'){
                --depth
            }
            if(depth === -1) return false
        }
        if(depth === 0) return true
        return false
    }
    console.log(bracketValidator('{}}{{}'))
</script>