Add onLoad and onError callbacks

src/index.js

@@ -8,7 +8,9 @@ class Img extends Component {
     unloader: node,
     decode: bool,
     src: oneOfType([string, arrayOf(string)]),
-    container: func
+    container: func,
+    onLoad: func,
+    onError: func
   }
 
   static defaultProps = {
@@ -54,6 +56,7 @@ class Img extends Component {
     cache[this.sourceList[this.state.currentIndex]] = true
     /* istanbul ignore else */
     if (this.i) this.setState({isLoaded: true})
+    if (this.props.onLoad) this.props.onLoad()
   }
 
   onError = () => {
@@ -95,9 +98,10 @@ class Img extends Component {
 
     // currentIndex is zero bases, length is 1 based.
     // if we have no more sources to try, return - we are done
-    if (nextIndex === this.sourceList.length)
+    if (nextIndex === this.sourceList.length) {
+      if (this.props.onError) this.props.onError()
       return this.setState({isLoading: false})
-
+    }
     // otherwise, try the next img
     this.loadImg()
   }

src/index.test.js

@@ -24,12 +24,12 @@ test('render with src array', () => {
 })
 
 test.skip('render with decode=true', () => {
-  const origionalDecode = window.Image.prototype.decode
+  const originalDecode = window.Image.prototype.decode
   const p = Promise.resolve()
   window.Image.prototype.decode = () => p
 
   const i = shallow(<Img src="foo" />)
-  window.Image.prototype.decode = origionalDecode
+  window.Image.prototype.decode = originalDecode
   return p.then(() => {
     // i.instance().i.dispatchEvent(new Event('load'))
     i.update()
@@ -173,3 +173,19 @@ test('onError try the next image. If its cached as error, skip it', () => {
     isLoaded: false
   })
 })
+
+test('onLoad callback is passed', () => {
+  const onLoadMock = jest.fn()
+  const i = shallow(<Img src="bar10" onLoad={onLoadMock}/>)
+  const instance = i.instance()
+  instance.onLoad()
+  expect(onLoadMock).toHaveBeenCalled()
+})
+
+test('onError callback is passed', () => {
+  const onErrorMock = jest.fn()
+  const i = shallow(<Img src="bar11" onError={onErrorMock}/>)
+  const instance = i.instance()
+  instance.onError();
+  expect(onErrorMock).toHaveBeenCalled()
+})