Add useCopyToClipboard

snippets/useCopyToClipboard.md

@@ -0,0 +1,60 @@
+---
+title: useCopyToClipboard
+tags: hooks,effect,state,callback,advanced
+---
+
+A hook that copies the given text to the clipboard.
+
+- Use the [copyToClipboard](/js/s/copy-to-clipboard/) snippet to copy the text to clipboard.
+- Use the `React.useState()` hook to initialize the `copied` variable.
+- Use the `React.useCallback()` hook to create a callback for the `copyToClipboard` method.
+- Use the `React.useEffect()` hook to reset the `copied` state variable if the `text` changes.
+- Return the `copied` state variable and the `copy` callback.
+
+```jsx
+const useCopyToClipboard = (text) => {
+  const copyToClipboard = (str) => {
+    const el = document.createElement('textarea');
+    el.value = str;
+    el.setAttribute('readonly', '');
+    el.style.position = 'absolute';
+    el.style.left = '-9999px';
+    document.body.appendChild(el);
+    const selected =
+      document.getSelection().rangeCount > 0
+        ? document.getSelection().getRangeAt(0)
+        : false;
+    el.select();
+    const success = document.execCommand('copy');
+    document.body.removeChild(el);
+    if (selected) {
+      document.getSelection().removeAllRanges();
+      document.getSelection().addRange(selected);
+    }
+    return success;
+  };
+
+  const [copied, setCopied] = React.useState(false);
+
+  const copy = React.useCallback(() => {
+    if (!copied) setCopied(copyToClipboard(text));
+  }, [text]);
+  React.useEffect(() => () => setCopied(false), [text]);
+
+  return [copied, copy];
+};
+```
+
+```jsx
+const TextCopy = (props) => {
+  const [copied, copy] = useCopyToClipboard('Lorem ipsum');
+  return (
+    <div>
+      <button onClick={copy}>Click to copy</button>
+      <span>{copied && 'Copied!'}</span>
+    </div>
+  );
+};
+
+ReactDOM.render(<TextCopy />, document.getElementById('root'));
+```