From 551125aa1b94a3c8866ded1ef45eb3a5d33d332b Mon Sep 17 00:00:00 2001
From: verlok <andrea.verlicchi@gmail.com>
Date: Sun, 10 Apr 2022 13:05:44 +0200
Subject: [PATCH] Releasing 17.7.0

---
 CHANGELOG.md              |  4 ++++
 README.md                 | 11 +++++++----
 dist/lazyload.amd.js      |  4 +++-
 dist/lazyload.amd.min.js  |  2 +-
 dist/lazyload.esm.js      |  4 +++-
 dist/lazyload.esm.min.js  |  2 +-
 dist/lazyload.iife.js     |  4 +++-
 dist/lazyload.iife.min.js |  2 +-
 dist/lazyload.js          |  4 +++-
 dist/lazyload.min.js      |  2 +-
 package.json              |  2 +-
 11 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4bf13fc..0388b95 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Version 17
 
+#### 17.7.0
+
+- Added the new option `restore_on_error` to restore original attributes on error.
+
 #### 17.6.1
 
 - Removed nasty "debugger" from code (sorry about that rookie mistake!)
diff --git a/README.md b/README.md
index ca4b174..c906127 100644
--- a/README.md
+++ b/README.md
@@ -159,7 +159,7 @@ Please note that the video poster can be lazily loaded too.
 
 ## 👩‍💻 Getting started - Script
 
-The latest, recommended version of LazyLoad is **17.6.1**.
+The latest, recommended version of LazyLoad is **17.7.0**.
 
 Quickly understand how to upgrade from a previous version reading the [practical upgrade guide](UPGRADE.md).
 
@@ -168,7 +168,7 @@ Quickly understand how to upgrade from a previous version reading the [practical
 The easiest way to use LazyLoad is to include the script from a CDN:
 
 ```html
-<script src="https://cdn.jsdelivr.net/npm/vanilla-lazyload@17.6.1/dist/lazyload.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/vanilla-lazyload@17.7.0/dist/lazyload.min.js"></script>
 ```
 
 Then, in your javascript code:
@@ -209,7 +209,7 @@ Then include the script.
 ```html
 <script
   async
-  src="https://cdn.jsdelivr.net/npm/vanilla-lazyload@17.6.1/dist/lazyload.min.js"
+  src="https://cdn.jsdelivr.net/npm/vanilla-lazyload@17.7.0/dist/lazyload.min.js"
 ></script>
 ```
 
@@ -243,7 +243,7 @@ Then include the script.
 ```html
 <script
   async
-  src="https://cdn.jsdelivr.net/npm/vanilla-lazyload@17.6.1/dist/lazyload.min.js"
+  src="https://cdn.jsdelivr.net/npm/vanilla-lazyload@17.7.0/dist/lazyload.min.js"
 ></script>
 ```
 
@@ -600,6 +600,8 @@ The [demos](https://github.com/verlok/vanilla-lazyload/tree/master/demos) folder
 | Loading   | Asynchronous loading LazyLoad + InterserctionObserver with requireJS                           | [Code](demos/amd_polyfill.html)                | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/amd_polyfill.html)                |
 | Loading   | Asynchronous loading LazyLoad with `<script async>`                                            | [Code](demos/async.html)                       | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/async.html)                       |
 | Loading   | Asynchronous loading multiple LazyLoad instances with `<script async>`                         | [Code](demos/async_multiple.html)              | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/async_multiple.html)              |
+| Error     | Test error loading behaviour when `restore_on_error` is `false`                                | [Code](demos/error_no_restore.html)            | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/error_no_restore.html)            |
+| Error     | Test error loading behaviour when `restore_on_error` is `true`                                 | [Code](demos/error_restore.html)               | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/error_restore.html)               |
 | Technique | Fade in images as they load                                                                    | [Code](demos/fade_in.html)                     | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/fade_in.html)                     |
 | Technique | Lazy load images in CSS-only horizontal sliders (Netflix style)                                | [Code](demos/sliders_css_only.html)            | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/sliders_css_only.html)            |
 | Technique | Lazily create Swiper instances and lazily load Swiper images                                   | [Code](demos/swiper.html)                      | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/swiper.html)                      |
@@ -709,6 +711,7 @@ Here's the list of the options.
 | `callback_applied`    | A callback function which is called whenever a multiple background element starts loading. Arguments: DOM element, lazyload instance.                                                                                                                                                                                                                                                                                                                        | `null`             | `(el)=>{console.log("Applied", el)}`     |
 | `callback_finish`     | A callback function which is called when there are no more elements to load _and_ all elements have been downloaded. Arguments: lazyload instance.                                                                                                                                                                                                                                                                                                           | `null`             | `()=>{console.log("Finish")}`            |
 | `use_native`          | This boolean sets whether or not to use [native lazy loading](https://addyosmani.com/blog/lazy-loading/) to do [hybrid lazy loading](https://www.smashingmagazine.com/2019/05/hybrid-lazy-loading-progressive-migration-native/). On browsers that support it, LazyLoad will set the `loading="lazy"` attribute on images, iframes and videos, and delegate their loading to the browser.                                                                    | `false`            | `true`                                   |
+| `restore_on_error`    | Tells LazyLoad if to restore the original values of `src`, `srcset` and `sizes` when a loading error occurs.                                                                                                                                                                                                                                                                                                                                                 | `false`            | `true`                                   |
 
 ### Methods
 
diff --git a/dist/lazyload.amd.js b/dist/lazyload.amd.js
index 96b949e..7417b61 100644
--- a/dist/lazyload.amd.js
+++ b/dist/lazyload.amd.js
@@ -54,7 +54,8 @@ define(function () { 'use strict';
     callback_error: null,
     callback_finish: null,
     callback_cancel: null,
-    use_native: false
+    use_native: false,
+    restore_on_error: false
   };
   var getExtendedSettings = function getExtendedSettings(customSettings) {
     return _extends({}, defaultSettings, customSettings);
@@ -497,6 +498,7 @@ define(function () { 'use strict';
     addClass(element, settings.class_error);
     setStatus(element, statusError);
     safeCallback(settings.callback_error, element, instance);
+    if (settings.restore_on_error) restoreOriginalAttrs(element, attrsSrcSrcsetSizes);
     if (!goingNative) checkFinish(settings, instance);
   };
   var addOneShotEventListeners = function addOneShotEventListeners(element, settings, instance) {
diff --git a/dist/lazyload.amd.min.js b/dist/lazyload.amd.min.js
index 343e213..b8730e0 100644
--- a/dist/lazyload.amd.min.js
+++ b/dist/lazyload.amd.min.js
@@ -1 +1 @@
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diff --git a/dist/lazyload.esm.js b/dist/lazyload.esm.js
index 6705121..8d0bf5b 100644
--- a/dist/lazyload.esm.js
+++ b/dist/lazyload.esm.js
@@ -40,7 +40,8 @@ const defaultSettings = {
     callback_error: null,
     callback_finish: null,
     callback_cancel: null,
-    use_native: false
+    use_native: false,
+    restore_on_error: false,
 };
 
 const getExtendedSettings = (customSettings) => {
@@ -461,6 +462,7 @@ const errorHandler = (event, element, settings, instance) => {
     addClass(element, settings.class_error);
     setStatus(element, statusError);
     safeCallback(settings.callback_error, element, instance);
+    if (settings.restore_on_error) restoreOriginalAttrs(element, attrsSrcSrcsetSizes);
     if (!goingNative) checkFinish(settings, instance);
 };
 
diff --git a/dist/lazyload.esm.min.js b/dist/lazyload.esm.min.js
index 5a354d9..131d8cc 100644
--- a/dist/lazyload.esm.min.js
+++ b/dist/lazyload.esm.min.js
@@ -1 +1 @@
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diff --git a/dist/lazyload.iife.js b/dist/lazyload.iife.js
index 65b0f5d..d77e210 100644
--- a/dist/lazyload.iife.js
+++ b/dist/lazyload.iife.js
@@ -55,7 +55,8 @@ var LazyLoad = (function () {
     callback_error: null,
     callback_finish: null,
     callback_cancel: null,
-    use_native: false
+    use_native: false,
+    restore_on_error: false
   };
   var getExtendedSettings = function getExtendedSettings(customSettings) {
     return _extends({}, defaultSettings, customSettings);
@@ -498,6 +499,7 @@ var LazyLoad = (function () {
     addClass(element, settings.class_error);
     setStatus(element, statusError);
     safeCallback(settings.callback_error, element, instance);
+    if (settings.restore_on_error) restoreOriginalAttrs(element, attrsSrcSrcsetSizes);
     if (!goingNative) checkFinish(settings, instance);
   };
   var addOneShotEventListeners = function addOneShotEventListeners(element, settings, instance) {
diff --git a/dist/lazyload.iife.min.js b/dist/lazyload.iife.min.js
index 8d7fd85..ffdc62c 100644
--- a/dist/lazyload.iife.min.js
+++ b/dist/lazyload.iife.min.js
@@ -1 +1 @@
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diff --git a/dist/lazyload.js b/dist/lazyload.js
index aad322b..d5ba617 100644
--- a/dist/lazyload.js
+++ b/dist/lazyload.js
@@ -58,7 +58,8 @@
     callback_error: null,
     callback_finish: null,
     callback_cancel: null,
-    use_native: false
+    use_native: false,
+    restore_on_error: false
   };
   var getExtendedSettings = function getExtendedSettings(customSettings) {
     return _extends({}, defaultSettings, customSettings);
@@ -501,6 +502,7 @@
     addClass(element, settings.class_error);
     setStatus(element, statusError);
     safeCallback(settings.callback_error, element, instance);
+    if (settings.restore_on_error) restoreOriginalAttrs(element, attrsSrcSrcsetSizes);
     if (!goingNative) checkFinish(settings, instance);
   };
   var addOneShotEventListeners = function addOneShotEventListeners(element, settings, instance) {
diff --git a/dist/lazyload.min.js b/dist/lazyload.min.js
index 906824c..891990f 100644
--- a/dist/lazyload.min.js
+++ b/dist/lazyload.min.js
@@ -1 +1 @@
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diff --git a/package.json b/package.json
index 8e4828d..03c7404 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vanilla-lazyload",
-  "version": "17.6.1",
+  "version": "17.7.0",
   "description": "LazyLoad is a lightweight (2.4 kB) and flexible script that speeds up your web application by deferring the loading of your below-the-fold images, videos and iframes to when they will enter the viewport. It's written in plain \"vanilla\" JavaScript, it leverages the IntersectionObserver API, it supports responsive images, it optimizes your website for slower connections, and can enable native lazy loading.",
   "main": "dist/lazyload.min.js",
   "module": "dist/lazyload.esm.js",