44 lines
1.2 KiB
JavaScript
44 lines
1.2 KiB
JavaScript
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(function($) {
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// Input: Array of JSON objects {selector, offset, callback}
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Materialize.scrollFire = function(options) {
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var didScroll = false;
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window.addEventListener("scroll", function() {
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didScroll = true;
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});
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// Rate limit to 100ms
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setInterval(function() {
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if(didScroll) {
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didScroll = false;
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var windowScroll = window.pageYOffset + window.innerHeight;
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for (var i = 0 ; i < options.length; i++) {
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// Get options from each line
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var value = options[i];
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var selector = value.selector,
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offset = value.offset,
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callback = value.callback;
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var currentElement = document.querySelector(selector);
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if ( currentElement !== null) {
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var elementOffset = currentElement.getBoundingClientRect().top + document.body.scrollTop;
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if (windowScroll > (elementOffset + offset)) {
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if (value.done !== true) {
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var callbackFunc = new Function(callback);
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callbackFunc();
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value.done = true;
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}
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}
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}
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}
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}
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}, 100);
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};
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})(jQuery);
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