Smoothscroll with javascript + jquery
// ==UserScript==
// @name Smoothscroll
// @run-at document-start
// @include *
// @author creec
// @description Smoothscroll with javascript + jquery
// @version 0.0.1.20141216001131
// @namespace https://greasyfork.org/users/3167
// ==/UserScript==
// a function that loads jQuery and calls a callback function when jQuery has finished loading
function addJQuery(callback) {
var script = document.createElement("script");
script.setAttribute("src", "//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js");
script.addEventListener('load', function() {
var script = document.createElement("script");
script.textContent = "window.jQ=jQuery.noConflict(true);(" + callback.toString() + ")();";
document.head.appendChild(script);
}, false);
document.head.appendChild(script);
}
// the guts of this userscript
function main() {
// Note, jQ replaces $ to avoid conflicts.
//alert("There are " + jQ('a').length + " links on this page.");
var startposition = false;
var targetposition = 0;
var position = 0;
function UpdatePosition()
{
jQ('html, body').stop();
jQ('html, body').animate({
scrollTop: position
}, 100,"linear",UpdatePosition)
}
function MouseScroll (event) {
var rolled = 0;
if (!startposition)
{
startposition = jQ(document).scrollTop();
}
if ('wheelDelta' in event) {
rolled = event.wheelDelta;
}
else { // Firefox
// The measurement units of the detail and wheelDelta properties are different.
rolled = -40 * event.detail;
}
targetposition = targetposition - rolled;
position = startposition + targetposition - rolled;
if (position < 0)
{
targetposition = -startposition;
}
if (position > (jQ(document).height()-jQ(window).height()))
{
targetposition = (jQ(document).height()-jQ(window).height()-startposition);
}
console.log(position);
UpdatePosition();
event.preventDefault();
return false;
}
var smoothscrollelem = window;
function Init () {
// for mouse scrolling in Firefox
if (smoothscrollelem.addEventListener) { // all browsers except IE before version 9
// Internet Explorer, Opera, Google Chrome and Safari
smoothscrollelem.addEventListener ("mousewheel", MouseScroll, false);
// Firefox
smoothscrollelem.addEventListener ("DOMMouseScroll", MouseScroll, false);
}
else {
if (smoothscrollelem.attachEvent) { // IE before version 9
smoothscrollelem.attachEvent ("onmousewheel", MouseScroll);
}
}
}
Init();
console.log("Smoothscroll loaded!");
}
// load jQuery and execute the main function
addJQuery(main);