move list items up and down using javascript
window.onload = function () {
var upLink = document.querySelectorAll(".up");
for (var i = 0; i < upLink.length; i++) {
upLink[i].addEventListener('click', function () {
var wrapper = this.parentElement;
if (wrapper.previousElementSibling)
wrapper.parentNode.insertBefore(wrapper, wrapper.previousElementSibling);
});
}
var downLink = document.querySelectorAll(".down");
for (var i = 0; i < downLink.length; i++) {
downLink[i].addEventListener('click', function () {
var wrapper = this.parentElement;
if (wrapper.nextElementSibling)
wrapper.parentNode.insertBefore(wrapper.nextElementSibling, wrapper);
});
}
}
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