feat: swizzle copy button to fix copy/paste with customizable value (#2134)

Author: ZachGoldberg

src/theme/CodeBlock/CopyButton/index.tsx

@@ -0,0 +1,59 @@
+import React, {useCallback, useState, useRef, useEffect} from 'react';
+import clsx from 'clsx';
+import copy from 'copy-text-to-clipboard';
+import {translate} from '@docusaurus/Translate';
+import type {Props} from '@theme/CodeBlock/CopyButton';
+import IconCopy from '@theme/Icon/Copy';
+import IconSuccess from '@theme/Icon/Success';
+
+import styles from './styles.module.css';
+import { parseCustomizableValuesToString } from '@site/src/components/CustomizableValue';
+
+export default function CopyButton({code, className}: Props): JSX.Element {
+  const [isCopied, setIsCopied] = useState(false);
+  const copyTimeout = useRef<number | undefined>(undefined);
+  const handleCopyCode = useCallback(() => {
+    copy(parseCustomizableValuesToString(code));
+    setIsCopied(true);
+    copyTimeout.current = window.setTimeout(() => {
+      setIsCopied(false);
+    }, 1000);
+  }, [code]);
+
+  useEffect(() => () => window.clearTimeout(copyTimeout.current), []);
+
+  return (
+    <button
+      type="button"
+      aria-label={
+        isCopied
+          ? translate({
+              id: 'theme.CodeBlock.copied',
+              message: 'Copied',
+              description: 'The copied button label on code blocks',
+            })
+          : translate({
+              id: 'theme.CodeBlock.copyButtonAriaLabel',
+              message: 'Copy code to clipboard',
+              description: 'The ARIA label for copy code blocks button',
+            })
+      }
+      title={translate({
+        id: 'theme.CodeBlock.copy',
+        message: 'Copy',
+        description: 'The copy button label on code blocks',
+      })}
+      className={clsx(
+        'clean-btn',
+        className,
+        styles.copyButton,
+        isCopied && styles.copyButtonCopied,
+      )}
+      onClick={handleCopyCode}>
+      <span className={styles.copyButtonIcons} aria-hidden="true">
+        <IconCopy className={styles.copyButtonIcon} />
+        <IconSuccess className={styles.copyButtonSuccessIcon} />
+      </span>
+    </button>
+  );
+}

src/theme/CodeBlock/CopyButton/styles.module.css

@@ -0,0 +1,40 @@
+:global(.theme-code-block:hover) .copyButtonCopied {
+  opacity: 1 !important;
+}
+
+.copyButtonIcons {
+  position: relative;
+  width: 1.125rem;
+  height: 1.125rem;
+}
+
+.copyButtonIcon,
+.copyButtonSuccessIcon {
+  position: absolute;
+  top: 0;
+  left: 0;
+  fill: currentColor;
+  opacity: inherit;
+  width: inherit;
+  height: inherit;
+  transition: all var(--ifm-transition-fast) ease;
+}
+
+.copyButtonSuccessIcon {
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%) scale(0.33);
+  opacity: 0;
+  color: #00d600;
+}
+
+.copyButtonCopied .copyButtonIcon {
+  transform: scale(0.33);
+  opacity: 0;
+}
+
+.copyButtonCopied .copyButtonSuccessIcon {
+  transform: translate(-50%, -50%) scale(1);
+  opacity: 1;
+  transition-delay: 0.075s;
+}