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Drag-n-drop_slider
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<link rel="stylesheet" href="style.css"> | |
</head> | |
<body> | |
<div id="slider" class="slider"> | |
<div class="thumb"></div> | |
</div> | |
<script> | |
var pageYOffset = 0, | |
pageXOffset = 0; | |
var sliderElem = document.getElementById('slider'); | |
var thumbElem = sliderElem.children[0]; | |
thumbElem.onmousedown = function(e) { | |
var thumbCoords = getCoords(thumbElem); | |
var shiftX = e.pageX - thumbCoords.left; | |
// shiftY здесь не нужен, слайдер двигается только по горизонтали | |
var sliderCoords = getCoords(sliderElem); | |
document.onmousemove = function(e) { | |
// вычесть координату родителя, т.к. position: relative | |
var newLeft = e.pageX - shiftX - sliderCoords.left; | |
// курсор ушёл вне слайдера | |
if (newLeft < 0) { | |
newLeft = 0; | |
} | |
var rightEdge = sliderElem.offsetWidth - thumbElem.offsetWidth; | |
if (newLeft > rightEdge) { | |
newLeft = rightEdge; | |
} | |
thumbElem.style.left = newLeft + 'px'; | |
} | |
document.onmouseup = function() { | |
document.onmousemove = document.onmouseup = null; | |
}; | |
return false; // disable selection start (cursor change) | |
}; | |
thumbElem.ondragstart = function() { | |
return false; | |
}; | |
function getCoords(elem) { // кроме IE8- | |
var box = elem.getBoundingClientRect(); | |
return { | |
top: box.top + pageYOffset, | |
left: box.left + pageXOffset | |
}; | |
} | |
</script> | |
</body> | |
</html> |
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