First separation commit.

Added LICENSE, README.md, CONTRIBUTORS.md

src/bower_components/emby-webcomponents/lazyloader/lazyloader-intersectionobserver.js

@@ -0,0 +1,45 @@
+define(["require", "browser"], function(require, browser) {
+    "use strict";
+
+    function LazyLoader(options) {
+        this.options = options
+    }
+
+    function unveilElements(elements, root, callback) {
+        if (elements.length) {
+            new LazyLoader({
+                callback: callback
+            }).addElements(elements)
+        }
+    }
+    return browser.edge && require(["css!./lazyedgehack"]), LazyLoader.prototype.createObserver = function() {
+        var observerOptions = {},
+            options = this.options,
+            loadedCount = 0,
+            callback = options.callback;
+        observerOptions.rootMargin = "50%";
+        var observerId = "obs" + (new Date).getTime(),
+            self = this,
+            observer = new IntersectionObserver(function(entries) {
+                for (var j = 0, length2 = entries.length; j < length2; j++) {
+                    var entry = entries[j];
+                    if (entry.intersectionRatio > 0) {
+                        var target = entry.target;
+                        observer.unobserve(target), target[observerId] || (target[observerId] = 1, callback(target), ++loadedCount >= self.elementCount && self.destroyObserver())
+                    }
+                }
+            }, observerOptions);
+        this.observer = observer
+    }, LazyLoader.prototype.addElements = function(elements) {
+        var observer = this.observer;
+        observer || (this.createObserver(), observer = this.observer), this.elementCount = (this.elementCount || 0) + elements.length;
+        for (var i = 0, length = elements.length; i < length; i++) observer.observe(elements[i])
+    }, LazyLoader.prototype.destroyObserver = function(elements) {
+        var observer = this.observer;
+        observer && (observer.disconnect(), this.observer = null)
+    }, LazyLoader.prototype.destroy = function(elements) {
+        this.destroyObserver(), this.options = null
+    }, LazyLoader.lazyChildren = function(elem, callback) {
+        unveilElements(elem.getElementsByClassName("lazy"), elem, callback)
+    }, LazyLoader
+});