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shabanovtg/dont-scroll-parent.js

Last active November 24, 2015 08:25
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Revisions

  1. shabanovtg revised this gist Nov 24, 2015. No changes.
  2. shabanovtg created this gist Nov 24, 2015.
    51 changes: 51 additions & 0 deletions dont-scroll-parent.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,51 @@
    ;(function ($) {
    'use strict';

    $.fn.dontScrollParent = function(options) {
    options = $.extend({
    // defaults
    wheelstop: null // Function
    }, options);

    // Compatibilities
    var isMsIE = ('Microsoft Internet Explorer' === navigator.appName),
    mousewheelEventName = 'mousewheel wheel DOMMouseScroll touchmove';

    function mousewheelPrevent(event) {
    event.preventDefault();
    event.stopPropagation();
    if('function' === typeof options.wheelstop) {
    options.wheelstop(event);
    }
    }

    return this.each(function() {
    var _this = this,
    $this = $(_this);
    $this.on(mousewheelEventName, function(event) {
    var origiEvent = event.originalEvent,
    scrollTop = _this.scrollTop,
    scrollMax = _this.scrollHeight - $this.outerHeight(),
    delta = -origiEvent.wheelDelta;
    if(isNaN(delta)) {
    delta = origiEvent.deltaY;
    }
    var scrollUp = delta < 0;
    if((scrollUp && scrollTop <= 0) || (!scrollUp && scrollTop >= scrollMax)) {
    mousewheelPrevent(event);
    } else if(isMsIE) {
    // Fix Internet Explorer and emulate natural scrolling
    var animOpt = { duration:200, easing:'linear' };
    if(scrollUp && -delta > scrollTop) {
    $this.stop(true).animate({ scrollTop:0 }, animOpt);
    mousewheelPrevent(event);
    } else if(!scrollUp && delta > scrollMax - scrollTop) {
    $this.stop(true).animate({ scrollTop:scrollMax }, animOpt);
    mousewheelPrevent(event);
    }
    }
    });
    });
    };

    })(jQuery);