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Okay it would seem like it should be simple. I need to take an already existing div and move it according to mouse position within the window. I have searched everywhere and it has led me to over-complicated ways of doing the same thing and involves the use of j-query. I need to strictly use javascript for what I am trying to do.

Method :

var mousePosition;
var div;

(function createDiv(){

    div = document.createElement("div");
    div.style.position = "absolute";
    div.style.left = "0px";
    div.style.top = "0px";
    div.style.width = "100px";
    div.style.height = "100px";
    div.style.background = "red";
    div.style.color = "blue";

    div.addEventListener('mousedown', handleKeyPressed, true);

    document.body.appendChild(div);


})();

function handleKeyPressed(event) {

    event.preventDefault();

    mousePosition = {

        x : event.clientX,
        y : event.clientY

    };

    div.style.left = mousePosition.x;
    div.style.top = mousePosition.y;

    //alert("whoa!");

}

Okay it would seem like it should be simple. I need to take an already existing div and move it according to mouse position within the window. I have searched everywhere and it has led me to over-complicated ways of doing the same thing and involves the use of j-query. I need to strictly use javascript for what I am trying to do.

Method :

var mousePosition;
var div;

(function createDiv(){

    div = document.createElement("div");
    div.style.position = "absolute";
    div.style.left = "0px";
    div.style.top = "0px";
    div.style.width = "100px";
    div.style.height = "100px";
    div.style.background = "red";
    div.style.color = "blue";

    div.addEventListener('mousedown', handleKeyPressed, true);

    document.body.appendChild(div);


})();

function handleKeyPressed(event) {

    event.preventDefault();

    mousePosition = {

        x : event.clientX,
        y : event.clientY

    };

    div.style.left = mousePosition.x;
    div.style.top = mousePosition.y;

    //alert("whoa!");

}

• javascript
• html
• onmousedown

Share Improve this question Follow asked Jun 5, 2014 at 2:37 StoneAgeCoderStoneAgeCoder 1,00311 gold badge88 silver badges1313 bronze badges 2

• 1 jQuery can do this, it's great for all things. Add jQuery UI and you have draggable out of the box. – adeneo Commented Jun 5, 2014 at 2:37
• 11 @adeneo jQuery is a javascript library want to learn about javascript not jquery although I know it is conventional to use it, not interested in learning it as of now. Just looking into pure javascript. – StoneAgeCoder Commented Jun 5, 2014 at 2:40

Add a comment  | 

10 Answers 10

Sorted by: Reset to default 108

I think you're looking for something more like this

var mousePosition;
var offset = [0,0];
var div;
var isDown = false;

div = document.createElement("div");
div.style.position = "absolute";
div.style.left = "0px";
div.style.top = "0px";
div.style.width = "100px";
div.style.height = "100px";
div.style.background = "red";
div.style.color = "blue";

document.body.appendChild(div);

div.addEventListener('mousedown', function(e) {
    isDown = true;
    offset = [
        div.offsetLeft - e.clientX,
        div.offsetTop - e.clientY
    ];
}, true);

document.addEventListener('mouseup', function() {
    isDown = false;
}, true);

document.addEventListener('mousemove', function(event) {
    event.preventDefault();
    if (isDown) {
        mousePosition = {

            x : event.clientX,
            y : event.clientY

        };
        div.style.left = (mousePosition.x + offset[0]) + 'px';
        div.style.top  = (mousePosition.y + offset[1]) + 'px';
    }
}, true);

FIDDLE

Support for touch inputs

All other answers (including the accepted one) do not work with touch inputs. Touch inputs have events different than that of mouse inputs. See Using Touch Events on MDN.

The following code snippet works even with touch inputs. I have highlighted all lines of code that need to be added to support touch devices.
The basic idea here is that every element containing draggable in the class list should be draggable. This concept is easier to follow when you have a big number of elements that need to be dragged.

See this Glitch page and following for a demo.

const d = document.getElementsByClassName("draggable");

for (let i = 0; i < d.length; i++) {
  d[i].style.position = "relative";
}

function filter(e) {
  let target = e.target;

  if (!target.classList.contains("draggable")) {
    return;
  }

  target.moving = true;

  //NOTICE THIS 

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