jQuery .css（“ margin-left”）

Question

I made a kind of game in javascript and in this game there are some divs which are horizontally moving with different transition times. In this game there is a function which is called each 1/100 seconds. Then it first checks it position with:

$("class1").css("margin-left") 

And now the weird thing: when I set the class in html like:

<div class = "class1"></div> 

The .css("margin-left") works perfectly, but when I don't set a class in html and I add the class in js like:

$("div:nth-child(6)").addClass("class1");

Then the $(theclass).css("margin-left") give wrong outputs. I tried with the .position and .offset but those both didn't work for me.

My code:

function newBlock(block, marginTop, bgc, height, hoogte1, hoogte2, v, tijd){
                        block.css("background-color", bgc).css("height", height).css("margin-top", marginTop);
                        var movement1 = "movement1";
                        var movement2 = "movement2";
//                        if (positionPixelsBlockF > 0){
//                            positionPixelsBlockF = positionBlockF.slice(0, 3);
//                        }
                        setInterval(positie, 10);
                        function positie(){
                        tijd = tijd + 1;
                        if (v != 0){
                            block.addClass("i" + v);
                            $(".i" + v).css({"width": "50px", "display": "inline-block", "position": "absolute", "z-index": "20"});
                            var positionBlockF = $(".i" + v).css("margin-left");
                            var positionPixelsBlockF = positionBlockF.slice(0, 4);
                            $("#uitleg4").html(positionPixelsBlockF);
else if (v === 0){
                            var positionBlockF = $(".b1").css("margin-left");
                            var positionPixelsBlockF = positionBlockF.slice(0, 4);

Don't mind the incomplete use of the {}, but in my code that's fixed.

PS: using brackets

Answer 1

I believe you are missing a dot before class1 selection, in jquery there are two types of elements selection either by class like $(".ElemnetClass") OR by ID like $("#ElementID")

More info about .css()

Answer 2

This Is An Example Of Your Requirement

 $(".class").css('margin-left','10px');// Some Px (or) percentage Your Based On Requirement

You Can Use This Type Also Firstly You Create One Class Of Your Requirements And Use Below Code

$("#ElementId").addClass('created classname Here');