Replace console statements with documentation (#159)

README.md

@@ -86,6 +86,13 @@ So you can safely send request in your component's `componentDidMount` without w
 
 ## Props
 
+### children
+
+Type: Node Default: undefined
+
+**NOTICE**
+Only one child is allowed to be passed.
+
 ### height
 
 Type: Number/String Default: undefined
@@ -157,6 +164,11 @@ If you provide a number, that will be how many `ms` to wait; if you provide `tru
 
 [demo](https://jasonslyvia.github.io/react-lazyload/examples/#/debounce)
 
+### wheel
+
+**DEPRECATED NOTICE**
+This props is not supported anymore, try set `overflow` for lazy loading in overflow containers.
+
 ## Utility
 
 ### forceCheck
@@ -175,7 +187,6 @@ Then call the function:
 forceCheck();
 ```
 
-
 ## Scripts
 
 ```

src/index.jsx

@@ -177,31 +177,10 @@ class LazyLoad extends Component {
   }
 
   componentDidMount() {
-    if (typeof process !== 'undefined' && process.env.NODE_ENV !== 'production') {
-      if (React.Children.count(this.props.children) > 1) {
-        console.warn('[react-lazyload] Only one child is allowed to be passed to `LazyLoad`.');
-      }
-
-      if (this.props.wheel) { // eslint-disable-line
-        console.warn('[react-lazyload] Props `wheel` is not supported anymore, try set `overflow` for lazy loading in overflow containers.');
-      }
-
-      // Warn the user if placeholder and height is not specified and the rendered height is 0
-      if (!this.props.placeholder && this.props.height === undefined && ReactDom.findDOMNode(this).offsetHeight === 0) {
-        console.warn('[react-lazyload] Please add `height` props to <LazyLoad> for better performance.');
-      }
-    }
-
     // It's unlikely to change delay type on the fly, this is mainly
     // designed for tests
-    let needResetFinalLazyLoadHandler = false;
-    if (this.props.debounce !== undefined && delayType === 'throttle') {
-      console.warn('[react-lazyload] Previous delay function is `throttle`, now switching to `debounce`, try setting them unanimously');
-      needResetFinalLazyLoadHandler = true;
-    } else if (delayType === 'debounce' && this.props.debounce === undefined) {
-      console.warn('[react-lazyload] Previous delay function is `debounce`, now switching to `throttle`, try setting them unanimously');
-      needResetFinalLazyLoadHandler = true;
-    }
+    const needResetFinalLazyLoadHandler = (this.props.debounce !== undefined && delayType === 'throttle')
+      || (delayType === 'debounce' && this.props.debounce === undefined);
 
     if (needResetFinalLazyLoadHandler) {
       off(window, 'scroll', finalLazyLoadHandler, passiveEvent);