如果 margin < "0px" 改变 margin

Question

我用这个代码

function moveContent(px) {
    var top = $('.scroll').position().top;

    $('.scroll').css('top', top+px);
}

function keyHandler(event)
{
    try
    {
        //some code here...

        else if (code == stb.KEY_PPLUS)
            moveContent(20); 
        else if (code == stb.KEY_PMINUS)
            moveContent(-20);

        //some code here...

我有一点，方块移出了屏幕。我想我需要这样的东西

if ($(".elementClass").css("margin-top")<'200px'){
    //don't move content in this direction
}

Answer 1

试试这个，

// get the margin in integer form
var margin=parseInt($(".elementClass").css("margin-top").replace('px',''));
if (margin < 200){
    //don't move content in this direction
} else{
    // whatever you want in else part...
}

如果 margin < "0px" 改变 margin

change margin if margin < "0px"

javascript

jquery

frontend