diff --git a/snippets/FileDrop.md b/snippets/FileDrop.md
index 4a8451bb1..223b88480 100644
--- a/snippets/FileDrop.md
+++ b/snippets/FileDrop.md
@@ -1,18 +1,16 @@
---
title: FileDrop
-tags: components,input,state,effect,event,intermediate
+tags: components,input,state,effect,event,advanced
---
Renders a file drag and drop component for a single file.
-- Create a ref called `dropRef` for this component.
-- Use the `React.useState()` hook to create the `drag` and `filename` variables, initialized to `false` and `''` respectively.
- The variables `dragCounter` and `drag` are used to determine if a file is being dragged, while `filename` is used to store the dropped file's name.
-- Create the `handleDrag`, `handleDragIn`, `handleDragOut` and `handleDrop` methods to handle drag and drop functionality, bind them to the component's context.
-- Each of the methods will handle a specific event, the listeners for which are created and removed in the `React.useEffect()` hook and its attached `cleanup()` method.
+- Create a ref, called `dropRef` and bind it to the component's wrapper.
+- Use the `useState()` hook to create the `drag` and `filename` variables, initialized to `false` and `''` respectively.
+- The variables `dragCounter` and `drag` are used to determine if a file is being dragged, while `filename` is used to store the dropped file's name.
+- Create the `handleDrag`, `handleDragIn`, `handleDragOut` and `handleDrop` methods to handle drag and drop functionality.
- `handleDrag` prevents the browser from opening the dragged file, `handleDragIn` and `handleDragOut` handle the dragged file entering and exiting the component, while `handleDrop` handles the file being dropped and passes it to `onDrop`.
-- Return an appropriately styled `
` and use `drag` and `filename` to determine its contents and style.
-- Finally, bind the `ref` of the created `
` to `dropRef`.
+- Use the `useEffect()` hook to handle each of the drag and drop events using the previously created methods.
```css
.filedrop {
@@ -77,7 +75,7 @@ const FileDrop = ({ onDrop }) => {
div.addEventListener('dragleave', handleDragOut);
div.addEventListener('dragover', handleDrag);
div.addEventListener('drop', handleDrop);
- return function cleanup() {
+ return () => {
div.removeEventListener('dragenter', handleDragIn);
div.removeEventListener('dragleave', handleDragOut);
div.removeEventListener('dragover', handleDrag);
@@ -88,14 +86,19 @@ const FileDrop = ({ onDrop }) => {
return (
- {filename && !drag ?
{filename}
:
Drop files here!
}
+ {filename && !drag ?
{filename}
:
Drop a file here!
}
);
};
```
```jsx
-ReactDOM.render(, document.getElementById('root'));
+ReactDOM.render(
+ ,
+ document.getElementById('root')
+);
```
diff --git a/snippets/RippleButton.md b/snippets/RippleButton.md
index 2849ba184..77fbf123a 100644
--- a/snippets/RippleButton.md
+++ b/snippets/RippleButton.md
@@ -5,13 +5,11 @@ tags: components,state,effect,intermediate
Renders a button that animates a ripple effect when clicked.
-- Define some appropriate CSS styles and an animation for the ripple effect.
-- Use the `React.useState()` hook to create appropriate variables and setters for the pointer's coordinates and for the animation state of the button.
-- Use the `React.useEffect()` hook to change the state every time the `coords` state variable changes, starting the animation.
+- Use the `useState()` hook to create the `coords` and `isRippling` state variables for the pointer's coordinates and the animation state of the button respectively.
+- Use a `useEffect()` hook to change the value of `isRippling` every time the `coords` state variable changes, starting the animation.
- Use `setTimeout()` in the previous hook to clear the animation after it's done playing.
-- Use the `React.useEffect()` hook a second time to reset `coords` whenever the `isRippling` state variable is `false.`
+- Use a `useEffect()` hook to reset `coords` whenever the `isRippling` state variable is `false.`
- Handle the `onClick` event by updating the `coords` state variable and calling the passed callback.
-- Finally, render a `