Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <div class="DragContainer">
    <div class=DragBox id=Item1 dragclass="DragDragBox">Item #1</div>
    <div class=DragBox id=Item2 dragclass="DragDragBox">Item #2</div>
    <div class=DragBox id=Item3 dragclass="DragDragBox">Item #3</div>
    <div class=DragBox id=Item4 dragclass="DragDragBox">Item #4</div>
</div>
              
            
!

CSS

              
                * {
    box-sizing: border-box;
}

body {
    font-family: "Poppins";
    font-size: 16px;
}

li {
    margin-bottom: 10px;
}
ol {
    margin-top: 5px;
}
.DragContainer {
    position: relative;
    border: #669999 2px solid;
    padding: 8px;
    margin: 8px;
}

.DragBox {
    border: #000 1px solid;
    padding: 8px 24px;
    margin-bottom: 4px;
    cursor: pointer;
    background-color: #eeeeee;
    transition: all 0.25s ease-out;
}
.DragBox:hover {
    background-color: #ffff99;
}
.DragHelper {
    border: 1px dotted red;
    transform: scale(1.1);
    transition: all 0.15s ease-out;
}


.DragDragBox {
    border: #000 1px solid;
    padding: 8px;
    margin-bottom: 4px;
    cursor: pointer;
    opacity: 0.5;
    background-color: #ff99cc;
    position: absolute;
}

              
            
!

JS

              
                // iMouseDown represents the current mouse button state: up or down
/*
lMouseState represents the previous mouse button state so that we can
check for button clicks and button releases:

if (iMouseDown && !lMouseState) // button just clicked!
if (!iMouseDown && lMouseState) // button just released!
*/
var mouseOffset = null;
var iMouseDown = false;
var lMouseState = false;

// Demo 0 variables
var DragDrops = [];
var curTarget = null;
var lastTarget = null;
var rootParent = null;
var rootSibling = null;

Number.prototype.NaN0 = function () {
    "use strict";

    return isNaN(this) ? 0 : this;
};

function CreateDragContainer(element) {
    "use strict";

    /*
	Create a new "Container Instance" so that items from one "Set" can not
	be dragged into items from another "Set"
	*/
    var j = 0,
        cDrag = DragDrops.length;

    DragDrops[cDrag] = [];
    element.setAttribute("DropObj", cDrag);

    /*
	Each item passed to this function should be a "container".  Store each
	of these items in our current container
	*/
    DragDrops[cDrag].push(element);

    /*
    Every top level item in these containers should be draggable.  Do this
    by setting the DragObj attribute on each item and then later checking
    this attribute in the mouseMove function
    */
    for (j = 0; j < element.childNodes.length; j += 1) {
        // Firefox puts in lots of #text nodes...skip these
        if (element.childNodes[j].nodeName !== "#text") {
            element.childNodes[j].setAttribute("DragObj", cDrag);
        }
    }
}

function getPosition(e) {
    "use strict";

    var left = 0,
        top = 0;

    while (e.offsetParent) {
        left +=
            e.offsetLeft +
            (e.currentStyle
                ? parseInt(e.currentStyle.borderLeftWidth, 10).NaN0()
                : 0);
        top +=
            e.offsetTop +
            (e.currentStyle
                ? parseInt(e.currentStyle.borderTopWidth, 10).NaN0()
                : 0);
        e = e.offsetParent;
    }

    left +=
        e.offsetLeft +
        (e.currentStyle
            ? parseInt(e.currentStyle.borderLeftWidth, 10).NaN0()
            : 0);
    top +=
        e.offsetTop +
        (e.currentStyle
            ? parseInt(e.currentStyle.borderTopWidth, 10).NaN0()
            : 0);

    return { x: left, y: top };
}

function mouseCoords(ev) {
    "use strict";

    if (ev.pageX || ev.pageY) {
        return {
            x: ev.pageX,
            y: ev.pageY
        };
    }

    return {
        x: ev.clientX + document.body.scrollLeft - document.body.clientLeft,
        y: ev.clientY + document.body.scrollTop - document.body.clientTop
    };
}

function getMouseOffset(target, ev) {
    "use strict";

    ev = ev || window.event;

    var docPos = getPosition(target),
        mousePos = mouseCoords(ev);

    return {
        x: mousePos.x - docPos.x,
        y: mousePos.y - docPos.y
    };
}

function mouseMove(ev) {
    "use strict";

    ev = ev || window.event;

    /*
     * We are setting target to whatever item the mouse is currently on
     * Firefox uses event.target here, MSIE uses event.srcElement
     */
    var elementInstance,
        target = ev.target || ev.srcElement,
        mousePos = mouseCoords(ev),
        origClass,
        dragClass,
        dragConts,
        dragObj,
        oClass,
        pos,
        i,
        j;

    // mouseOut event - fires if the item the mouse is on has changed
    if (lastTarget && target !== lastTarget) {
        // reset the classname for the target element
        origClass = lastTarget.getAttribute("origClass");
        if (origClass) {
            lastTarget.className = origClass;
        }
    }

    /*
    dragObj is the grouping our item is in (set from the createDragContainer function).
    if the item is not in a grouping we ignore it since it can't be dragged with this
    script.
    */
    dragObj = target.getAttribute("DragObj");

    // if the mouse was moved over an element that is draggable
    if (dragObj !== null) {
        // if the user is just starting to drag the element
        if (iMouseDown && !lMouseState) {
            // mouseDown target
            curTarget = target;

            // Record the mouse x and y offset for the element
            rootParent = curTarget.parentNode;
            rootSibling = curTarget.nextSibling;

            mouseOffset = getMouseOffset(target, ev);

            /*
			Record the current position of all drag/drop targets related
			to the element.  We do this here so that we do not have to do
			it on the general mouse move event which fires when the mouse
			moves even 1 pixel.  If we don't do this here the script
			would run much slower.
			*/
            dragConts = DragDrops[dragObj];

            /*
			first record the width/height of our drag item.  Then hide it since
			it is going to (potentially) be moved out of its parent.
			*/
            curTarget.setAttribute(
                "startWidth",
                parseInt(curTarget.offsetWidth, 10)
            );
            curTarget.setAttribute(
                "startHeight",
                parseInt(curTarget.offsetHeight, 10)
            );
            curTarget.style.display = "none";

            // loop through each possible drop container
            for (i = 0; i < dragConts.length; i += 1) {
                elementInstance = dragConts[i];

                pos = getPosition(dragConts[i]);

                /*
				save the width, height and position of each container.

                Even though we are saving the width and height of each
				container back to the container this is much faster because
				we are saving the number and do not have to run through
				any calculations again.  Also, offsetHeight and offsetWidth
				are both fairly slow.  You would never normally notice any
				performance hit from these two functions but our code is
				going to be running hundreds of times each second so every
				little bit helps!

				Note that the biggest performance gain here, by far, comes
				from not having to run through the getPosition function
				hundreds of times.
				*/
                elementInstance.setAttribute(
                    "startWidth",
                    parseInt(elementInstance.offsetWidth, 10)
                );
                elementInstance.setAttribute(
                    "startHeight",
                    parseInt(elementInstance.offsetHeight, 10)
                );
                elementInstance.setAttribute("startLeft", pos.x);
                elementInstance.setAttribute("startTop", pos.y);

                // Loop through each child element of each container
                for (j = 0; j < dragConts[i].childNodes.length; j += 1) {
                    elementInstance = dragConts[i].childNodes[j];

                    if (
                        elementInstance.nodeName === "#text" ||
                        dragConts[i].childNodes[j] === curTarget
                    ) {
                        continue;
                    }

                    pos = getPosition(dragConts[i].childNodes[j]);

                    // Save the width, height and position of each element
                    elementInstance.setAttribute(
                        "startWidth",
                        parseInt(elementInstance.offsetWidth, 10)
                    );
                    elementInstance.setAttribute(
                        "startHeight",
                        parseInt(elementInstance.offsetHeight, 10)
                    );
                    elementInstance.setAttribute("startLeft", pos.x);
                    elementInstance.setAttribute("startTop", pos.y);
                }
            }
        }
    }

    // If we get in here we are dragging something
    if (curTarget) {
        dragConts = DragDrops[curTarget.getAttribute("DragObj")];
        var activeCont = null;

        var xPos =
            mousePos.x -
            mouseOffset.x +
            parseInt(curTarget.getAttribute("startWidth"), 10) / 2;
        var yPos =
            mousePos.y -
            mouseOffset.y +
            parseInt(curTarget.getAttribute("startHeight"), 10) / 2;

        // check each drop container to see if our target object is "inside" the container
        for (i = 0; i < dragConts.length; i += 1) {
            elementInstance = dragConts[i];

            if (
                parseInt(elementInstance.getAttribute("startLeft"), 10) <
                    xPos &&
                parseInt(elementInstance.getAttribute("startTop"), 10) < yPos &&
                parseInt(elementInstance.getAttribute("startLeft"), 10) +
                    parseInt(elementInstance.getAttribute("startWidth"), 10) >
                    xPos &&
                parseInt(elementInstance.getAttribute("startTop"), 10) +
                    parseInt(elementInstance.getAttribute("startHeight"), 10) >
                    yPos
            ) {
                /*
                our target is inside of our container so save the container into
                the activeCont variable and then exit the loop since we no longer
                need to check the rest of the containers
                */
                activeCont = dragConts[i];

                // exit the for loop
                break;
            }
        }

        // Our target object is in one of our containers.  Check to see where our div belongs
        if (activeCont) {
            if (activeCont !== curTarget.parentNode) {
                //activeCont.id;
            }

            // beforeNode will hold the first node AFTER where our div belongs
            var beforeNode = null;

            // loop through each child node (skipping text nodes).
            for (i = activeCont.childNodes.length - 1; i >= 0; i -= 1) {
                elementInstance = activeCont.childNodes[i];

                if (elementInstance.nodeName === "#text") {
                    continue;
                }

                // if the current item is "After" the item being dragged
                if (
                    curTarget != activeCont.childNodes[i] &&
                    parseInt(elementInstance.getAttribute("startLeft")) +
                        parseInt(elementInstance.getAttribute("startWidth")) >
                        xPos &&
                    parseInt(elementInstance.getAttribute("startTop")) +
                        parseInt(elementInstance.getAttribute("startHeight")) >
                        yPos
                ) {
                    beforeNode = activeCont.childNodes[i];
                }
            }

            // the item being dragged belongs before another item
            if (beforeNode) {
                if (beforeNode != curTarget.nextSibling) {
                    activeCont.insertBefore(curTarget, beforeNode);
                }

                // the item being dragged belongs at the end of the current container
            } else {
                if (
                    curTarget.nextSibling ||
                    curTarget.parentNode != activeCont
                ) {
                    activeCont.appendChild(curTarget);
                }
            }

            // the timeout is here because the container doesn't "immediately" resize
            setTimeout(function () {
                var contPos = getPosition(activeCont);
                activeCont.setAttribute(
                    "startWidth",
                    parseInt(activeCont.offsetWidth)
                );
                activeCont.setAttribute(
                    "startHeight",
                    parseInt(activeCont.offsetHeight)
                );
                activeCont.setAttribute("startLeft", contPos.x);
                activeCont.setAttribute("startTop", contPos.y);
            }, 5);

            // make our drag item visible
            if (curTarget.style.display !== "") {
                curTarget.style.display = "";
                curTarget.style.visibility = "visible";
                curTarget.classList.add('DragHelper');
            }
        }
    }

    // track the current mouse state so we can compare against it next time
    lMouseState = iMouseDown;

    // mouseMove target
    lastTarget = target;

    // track the current mouse state so we can compare against it next time
    lMouseState = iMouseDown;

    // this prevents items on the page from being highlighted while dragging
    if (curTarget) return false;
}

function mouseUp() {
    if (curTarget) {
        if (curTarget.style.display == "none") {
            if (rootSibling) {
                rootParent.insertBefore(curTarget, rootSibling);
            } else {
                rootParent.appendChild(curTarget);
            }
        }
        curTarget.style.display = "";
        curTarget.style.visibility = "visible";
                curTarget.classList.remove('DragHelper');
    }
    curTarget = null;
    iMouseDown = false;

    // action!
}

function mouseDown(ev) {
    ev = ev || window.event;

    var target = ev.target || ev.srcElement;

    iMouseDown = true;

    if (target.onmousedown || target.getAttribute("DragObj")) {
        return false;
    }
}

document.onmousemove = mouseMove;
document.onmousedown = mouseDown;
document.onmouseup = mouseUp;

window.onload = function () {
    CreateDragContainer(document.querySelector(".DragContainer"));
};

              
            
!
999px

Console