[dev-overlay] expandable error message container (#76297)

When the error message exceeds 200px in height, we want to collapse the
part above 200px, and show a button to expand it.

[CleanShot 2025-02-20 at 16.46.16.mp4 <span
class="graphite__hidden">(uploaded via Graphite)</span> <img
class="graphite__hidden"
src="https://app.graphite.dev/api/v1/graphite/video/thumbnail/rKSEEwxbNzdFs9t0yyxN/ad657511-2c09-4180-85db-be7325f45d2f.mp4"
/>](https://app.graphite.dev/media/video/rKSEEwxbNzdFs9t0yyxN/ad657511-2c09-4180-85db-be7325f45d2f.mp4)

Closes NDX-743

Author: gaojude

packages/next/src/client/components/react-dev-overlay/_experimental/internal/components/errors/error-message/error-message.stories.tsx

@@ -34,6 +34,15 @@ export const LongString: Story = {
   },
 }
 
+export const SuperLongString: Story = {
+  args: {
+    errorMessage:
+      'Lorem ipsum dolor sit, amet consectetur adipisicing elit. Praesentium molestiae, perspiciatis earum labore repudiandae aliquid atque soluta ullam. Quidem provident non at. Reprehenderit similique harum recusandae id est dolore temporibus!\n'.repeat(
+        30
+      ),
+  },
+}
+
 export const ReactNode: Story = {
   args: {
     errorMessage: (

packages/next/src/client/components/react-dev-overlay/_experimental/internal/components/errors/error-message/error-message.tsx

@@ -1,3 +1,4 @@
+import { useState, useRef, useLayoutEffect } from 'react'
 import { noop as css } from '../../../helpers/noop-template'
 
 export type ErrorMessageType = React.ReactNode
@@ -7,17 +8,47 @@ type ErrorMessageProps = {
 }
 
 export function ErrorMessage({ errorMessage }: ErrorMessageProps) {
+  const [isExpanded, setIsExpanded] = useState(false)
+  const [shouldTruncate, setShouldTruncate] = useState(false)
+  const messageRef = useRef<HTMLParagraphElement>(null)
+
+  useLayoutEffect(() => {
+    if (messageRef.current) {
+      setShouldTruncate(messageRef.current.scrollHeight > 200)
+    }
+  }, [errorMessage])
+
   return (
-    <p
-      id="nextjs__container_errors_desc"
-      className="nextjs__container_errors_desc"
-    >
-      {errorMessage}
-    </p>
+    <div className="nextjs__container_errors_wrapper">
+      <p
+        ref={messageRef}
+        id="nextjs__container_errors_desc"
+        className={`nextjs__container_errors_desc ${shouldTruncate && !isExpanded ? 'truncated' : ''}`}
+      >
+        {errorMessage}
+      </p>
+      {shouldTruncate && !isExpanded && (
+        <>
+          <div className="nextjs__container_errors_gradient_overlay" />
+          <button
+            onClick={() => setIsExpanded(true)}
+            className="nextjs__container_errors_expand_button"
+            aria-expanded={isExpanded}
+            aria-controls="nextjs__container_errors_desc"
+          >
+            Show More
+          </button>
+        </>
+      )}
+    </div>
   )
 }
 
 export const styles = css`
+  .nextjs__container_errors_wrapper {
+    position: relative;
+  }
+
   .nextjs__container_errors_desc {
     margin: 0;
     margin-left: var(--size-1);
@@ -29,4 +60,42 @@ export const styles = css`
     overflow-wrap: break-word;
     white-space: pre-wrap;
   }
+
+  .nextjs__container_errors_desc.truncated {
+    max-height: 200px;
+    overflow: hidden;
+  }
+
+  .nextjs__container_errors_gradient_overlay {
+    position: absolute;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    height: 85px;
+    background: linear-gradient(
+      180deg,
+      rgba(250, 250, 250, 0) 0%,
+      var(--color-background-200) 100%
+    );
+  }
+
+  .nextjs__container_errors_expand_button {
+    position: absolute;
+    bottom: 10px;
+    left: 50%;
+    transform: translateX(-50%);
+    display: flex;
+    align-items: center;
+    padding: 6px 8px;
+    background: var(--color-background-100);
+    border: 1px solid var(--color-gray-alpha-400);
+    border-radius: 999px;
+    box-shadow:
+      0px 2px 2px var(--color-gray-alpha-100),
+      0px 8px 8px -8px var(--color-gray-alpha-100);
+    font-size: 13px;
+    cursor: pointer;
+    color: var(--color-gray-900);
+    font-weight: 500;
+  }
 `