I'm using drag event for moving an element, but I didn't find a way to make it only move horizontally, it's there any clue for this? Thanks in advance!
There is three steps we need to do
first we get the current mouse x position
second we calculate the distance it has move and the direction by newX = oldX - e.clientX saying subtract old x with current mouse x this way we get something like -3 or 2 or -1 you see we have the distance the direction - or +
Third step we update the element horizontal position by element.style.left = (element.offsetLeft - newX) + "px"
There are more details in the comments in the code. let me know if its not clear
var oldX = 0, newX = 0; // for storing X (horizontal) positions
var element = document.getElementById("mydiv"); // The element you want to drag
// We do the dragging here
function elementDrag(e) {
e = e || window.event;
e.preventDefault();
newX = oldX - e.clientX; // to calculate how much we have moved
oldX = e.clientX; // store current value to use for next move
element.style.left = (element.offsetLeft - newX) + "px"; // update left position
}
// we do this so there is not multiple event handlers
function closeDragElement() {
document.onmouseup = null;
document.onmousemove = null;
}
// when mouse down on element attach mouse move and mouse up for document
// so that if mouse goes outside element still drags
function dragMouseDown(e) {
e = e || window.event;
e.preventDefault();
oldX = e.clientX; // store current value to use for mouse move calculation
document.onmouseup = closeDragElement;
document.onmousemove = elementDrag;
}
element.onmousedown = dragMouseDown;#mydiv {
position: absolute;
z-index: 9;
background-color: #2196F3;
text-align: center;
border: 1px solid #d3d3d3;
padding: 10px;
cursor: move;
color: #fff;
}<div id="mydiv">
Click here to move
</div>