BF Interpreter

//BF interpreter
/*function interpret(string)
{
    console.log(string)
    var array = string.split("");
    var cells = new Uint8Array(300);
    var cellPointer = 0;

    result = "";

    for(var i = 0; i < array.length; i++) {
        switch(array[i]) {
            case '<':
            //console.log('<')
                cellPointer--;

                if(cellPointer < 0) { console.error("out of bounds"); }
            break;

            case '>':
            //console.log('.')
                cellPointer++;
            break;

            case '+':
            //console.log('+')
                cells[cellPointer]++;
            break;

            case '-':
            //console.log('-')
                cells[cellPointer]--;
            break;

            case '.':
            //console.log('.')
                //console.log(String.fromCharCode((cells[cellPointer]) + 1) % 255);
                var code = (cells[cellPointer] + 0) % 255;
                result += String.fromCharCode(code);
            break;

            case ',':
            //console.log(',')
                cells[cellPointer] = Number(prompt("Input a value:")) + 48;
            break;

            case '[':
            //console.log('[')
                if(cells[cellPointer] == 0) {
                    while((array[i] != null) && (array[i] != undefined)) {
                        i++;
                        if(array[i] == ']') {
                            break;
                        }
                    }
                }
            break;

            case ']':
            //console.log(']')
                if(cells[cellPointer] != 0) {
                    while((array[i] != null) && (array[i] != undefined)) {
                        i--;
                        if(array[i] == '[') {
                            break;
                        }
                    }
                }
            break;
        }
    }

    console.log(result)
}

//var test = ",[>+<-]>."
//var test = ">++++++[<++++++++++>-]<++++++.";
var test = "++++++++++>>+++[<++++++++++>-]<++>>+++[<++++++++++>-]<+++++>+++++[>+++++[<<.<.>>>-]<<<<.>>>-]";
interpret(test)*/