change collapse component to hooks implementation

snippets/Collapse.md

@@ -5,52 +5,46 @@ Renders a component with collapsible content.
 Use the value of the `collapsed` prop to determine the initial state of the content (collapsed/expanded).
 Set the `state` of the component to the value of the `collapsed` prop (cast to a boolean value) and bind the `toggleCollapse` method to the component's context.
 Use an object, `style`, to hold the styles for individual components and their states.
-Create a method, `toggleCollapse`, which uses `Component.prototype.setState` to change the component's `state` from collapsed to expanded and vice versa.
+Create a method, `toggleCollapse` to change the component's `state` from collapsed to expanded and vice versa.
 In the `render()` method, use a `<div>` to wrap both the `<button>` that alters the component's `state` and the content of the component, passed down via `props.children`.
 Determine the appearance of the content, based on `state.collapsed` and apply the appropriate CSS rules from the `style` object.
 Finally, update the value of the `aria-expanded` attribute based on `state.collapsed` to make the component accessible.
 
 ```jsx
-class Collapse extends React.Component {
+const style = {
-  constructor(props) {
+  collapsed: {
-    super(props);
+    display: "none"
-    this.state = {
+  },
-      collapsed: !!props.collapsed
+  expanded: {
-    };
+    display: "block"
-    this.style = {
+  },
-      collapsed: {
+  buttonStyle: {
-        display: 'none'
+    display: "block",
-      },
+    width: "100%"
-      expanded: {
-        display: 'block'
-      },
-      buttonStyle: {
-        display: 'block',
-        width: '100%'
-      }
-    };
-    this.toggleCollapse = this.toggleCollapse.bind(this);
   }
+};
 
-  toggleCollapse() {
+function Collapse(props) {
-    this.setState(state => ({ collapsed: !state.collapsed }));
+  const [isCollapsed, setCollapsed] = useState(props.collapsed);
-  }
 
-  render() {
+  const toggleCollapse = () => {
-    return (
+    setCollapsed(!isCollapsed);
-      <div>
+  };
-        <button style={this.style.buttonStyle} onClick={this.toggleCollapse}>
+
-          {this.state.collapsed ? 'Show' : 'Hide'} content
+  return (
-        </button>
+    <div>
-        <div 
+      <button style={style.buttonStyle} onClick={() => toggleCollapse()}>
-          style= {this.state.collapsed ? this.style.collapsed : this.style.expanded} 
+        {isCollapsed ? "Show" : "Hide"} content
-          aria-expanded = {this.state.collapsed}
+      </button>
-        >
+      <div
-          {this.props.children}
+        className="collapse-content"
-        </div>
+        style={isCollapsed ? style.collapsed : style.expanded}
+        aria-expanded={isCollapsed}
+      >
+        {props.children}
       </div>
-    );
+    </div>
-  }
+  );
 }
 ```