Created
December 31, 2016 19:40
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vanilla javascript drag objects
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var selected = null, // Object of the element to be moved | |
x_pos = 0, y_pos = 0, // Stores x & y coordinates of the mouse pointer | |
x_elem = 0, y_elem = 0; // Stores top, left values (edge) of the element | |
// Will be called when user starts dragging an element | |
function _drag_init(elem) { | |
// Store the object of the element which needs to be moved | |
selected = elem; | |
x_elem = x_pos - selected.offsetLeft; | |
y_elem = y_pos - selected.offsetTop; | |
} | |
// Will be called when user dragging an element | |
function _move_elem(e) { | |
x_pos = document.all ? window.event.clientX : e.pageX; | |
y_pos = document.all ? window.event.clientY : e.pageY; | |
if (selected !== null) { | |
selected.style.left = (x_pos - x_elem) + 'px'; | |
selected.style.top = (y_pos - y_elem) + 'px'; | |
} | |
} | |
// Destroy the object when we are done | |
function _destroy() { | |
selected = null; | |
} | |
// Bind the functions... | |
document.getElementById('draggable-element').onmousedown = function () { | |
_drag_init(this); | |
return false; | |
}; | |
document.getElementById('draggable-element2').onmousedown = function () { | |
_drag_init(this); | |
return false; | |
}; | |
document.onmousemove = _move_elem; | |
document.onmouseup = _destroy; |
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