Using an IF statement in javascript and it makes my innerHTML and console.log's flash on and off the screen

unction getNode(value){
    console.log(value)
    if (choosenStart === true){
        end = value
        submitValues(start,end)
    }
    else{
        start = value
    }
}

This my code I can show more of the code if needed but this is the code that is triggering the issue