Lanjs
<body> <img src="img/loading.gif" Lan="img/photo.jpg"> <script src="dist/lan.js"></script> <script> Lan.init({ offset: 100, throttle: 250, unload: false, callback: function (element, op) { console.log(element, 'has been', op + 'ed') } }); // Lan.render(); is also available for non-scroll callbacks </script> </body>License
MIT