Merge pull request #71 from lngramos/master

Remove data-echo-background attribute upon image load

dist/echo.js

@@ -1,4 +1,4 @@
-/*! echo.js v1.6.0 | (c) 2014 @toddmotto | https://github.com/toddmotto/echo */
+/*! echo.js v1.6.0 | (c) 2015 @toddmotto | https://github.com/toddmotto/echo */
 (function (root, factory) {
   if (typeof define === 'function' && define.amd) {
     define(function() {

dist/echo.min.js

@@ -1,2 +1,2 @@
-/*! echo.js v1.6.0 | (c) 2014 @toddmotto | https://github.com/toddmotto/echo */
+/*! echo.js v1.6.0 | (c) 2015 @toddmotto | https://github.com/toddmotto/echo */
 !function(t,e){"function"==typeof define&&define.amd?define(function(){return e(t)}):"object"==typeof exports?module.exports=e:t.echo=e(t)}(this,function(t){"use strict";var e,n,o,r,c,a={},d=function(){},u=function(t,e){var n=t.getBoundingClientRect();return n.right>=e.l&&n.bottom>=e.t&&n.left<=e.r&&n.top<=e.b},l=function(){(r||!n)&&(clearTimeout(n),n=setTimeout(function(){a.render(),n=null},o))};return a.init=function(n){n=n||{};var u=n.offset||0,i=n.offsetVertical||u,f=n.offsetHorizontal||u,s=function(t,e){return parseInt(t||e,10)};e={t:s(n.offsetTop,i),b:s(n.offsetBottom,i),l:s(n.offsetLeft,f),r:s(n.offsetRight,f)},o=s(n.throttle,250),r=n.debounce!==!1,c=!!n.unload,d=n.callback||d,a.render(),document.addEventListener?(t.addEventListener("scroll",l,!1),t.addEventListener("load",l,!1)):(t.attachEvent("onscroll",l),t.attachEvent("onload",l))},a.render=function(){for(var n,o,r=document.querySelectorAll("img[data-echo], [data-echo-background]"),l=r.length,i={l:0-e.l,t:0-e.t,b:(t.innerHeight||document.documentElement.clientHeight)+e.b,r:(t.innerWidth||document.documentElement.clientWidth)+e.r},f=0;l>f;f++)o=r[f],u(o,i)?(c&&o.setAttribute("data-echo-placeholder",o.src),null!==o.getAttribute("data-echo-background")?o.style.backgroundImage="url("+o.getAttribute("data-echo-background")+")":o.src=o.getAttribute("data-echo"),c||o.removeAttribute("data-echo"),d(o,"load")):c&&(n=o.getAttribute("data-echo-placeholder"))&&(null!==o.getAttribute("data-echo-background")?o.style.backgroundImage="url("+n+")":o.src=n,o.removeAttribute("data-echo-placeholder"),d(o,"unload"));l||a.detach()},a.detach=function(){document.removeEventListener?t.removeEventListener("scroll",l):t.detachEvent("onscroll",l),clearTimeout(n)},a});

src/echo.js

@@ -89,6 +89,7 @@
 
         if (!unload) {
           elem.removeAttribute('data-echo');
+          elem.removeAttribute('data-echo-background');
         }
 
         callback(elem, 'load');