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Added optional scrollable viewport other than window #30

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Added optional scrollable viewport other than window #30

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16 changes: 10 additions & 6 deletions jquery.appear.js
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Original file line number Diff line number Diff line change
Expand Up @@ -11,11 +11,11 @@
(function($) {
var selectors = [];

var check_binded = false;
var check_lock = false;
var defaults = {
interval: 250,
force_process: false
force_process: false,
scroll_selector: window
}
var $window = $(window);

Expand Down Expand Up @@ -64,9 +64,11 @@
$.fn.extend({
// watching for element's appearance in browser viewport
appear: function(options) {

var opts = $.extend({}, defaults, options || {});
var selector = this.selector || this;
if (!check_binded) {

if( typeof $(opts.scroll_selector).data('appear_binded') === 'undefined' ) {
var on_check = function() {
if (check_lock) {
return;
Expand All @@ -76,8 +78,10 @@
setTimeout(process, opts.interval);
};

$(window).scroll(on_check).resize(on_check);
check_binded = true;
$(opts.scroll_selector).on('scroll',on_check);
$(window).resize(on_check);

$(opts.scroll_selector).data('appear_binded',true);
}

if (opts.force_process) {
Expand All @@ -91,7 +95,7 @@
$.extend({
// force elements's appearance check
force_appear: function() {
if (check_binded) {
if( typeof $(opts.scroll_selector).data('appear_binded') !== 'undefined' ) {
process();
return true;
};
Expand Down