[Error Overlay] New design (#75679)

This PR implements a new design for the experimental Next.js Error
Overlay:

- Border-less body design
- Notch cut-out for the navigation and version info

<img width="1088" alt="image"
src="https://github.com/user-attachments/assets/31385793-82c4-41ab-a34d-6b49955f5823"
/>



---

- Closes
[NDX-782](https://linear.app/vercel/issue/NDX-782/re-redesign-contents-in-a-single-body-with-padding)
- Closes
[NDX-781](https://linear.app/vercel/issue/NDX-781/re-redesign-navigation-header)

---------

Co-authored-by: devjiwonchoi <[email protected]>

Author: raunofreiberg

Diff for: packages/next/src/client/components/react-dev-overlay/_experimental/internal/components/call-stack-frame/call-stack-frame.tsx

@@ -52,7 +52,6 @@ export const CallStackFrame: React.FC<{
     <div
       data-nextjs-call-stack-frame
       data-nextjs-call-stack-frame-ignored={!hasSource}
-      data-animate={frame.ignored}
       {...props}
       style={
         {
@@ -89,25 +88,17 @@ export const CALL_STACK_FRAME_STYLES = css`
     user-select: text;
     display: block;
     box-sizing: border-box;
-    width: 100%;
 
     user-select: text;
     -webkit-user-select: text;
     -moz-user-select: text;
     -ms-user-select: text;
 
-    padding: var(--size-1_5) var(--size-2);
-    margin-bottom: var(--size-1);
+    padding: 6px 8px;
 
     border-radius: var(--rounded-lg);
     transition: background 100ms ease-out;
 
-    &[data-animate='true'] {
-      filter: blur(4px);
-      animation: fadeIn 250ms var(--timing-swift) forwards
-        calc(var(--index) * 25ms);
-    }
-
     &:not(:disabled)[role='button']:hover {
       background: var(--color-gray-alpha-100);
       cursor: pointer;
@@ -141,10 +132,4 @@ export const CALL_STACK_FRAME_STYLES = css`
     font-size: var(--size-font-small);
     line-height: var(--size-5);
   }
-
-  @keyframes fadeIn {
-    to {
-      filter: blur(0px);
-    }
-  }
 `

Diff for: packages/next/src/client/components/react-dev-overlay/_experimental/internal/components/code-frame/code-frame.tsx

@@ -104,28 +104,29 @@ export const CODE_FRAME_STYLES = css`
     overflow: hidden;
     color: var(--color-gray-1000);
     text-overflow: ellipsis;
+    border: 1px solid var(--color-gray-400);
+    border-radius: 8px;
     font-family: var(--font-stack-monospace);
     font-size: 12px;
     line-height: 16px;
-    margin: var(--size-4) var(--size-4) var(--size-2);
-    border: 1px solid var(--color-gray-400);
-    border-radius: var(--size-2);
+    margin: var(--next-dialog-row-padding);
+
+    &:has(~ [data-nextjs-call-stack]) {
+      margin-bottom: 0;
+    }
   }
 
   .code-frame-link,
   .code-frame-pre {
     padding: 12px;
   }
 
-  .code-frame-pre {
-    white-space: pre-wrap;
-  }
-
   .code-frame-header {
     width: 100%;
     cursor: pointer;
-    border-bottom: 1px solid var(--color-gray-400);
     transition: background 100ms ease-out;
+    border-radius: 8px 8px 0 0;
+    border-bottom: 1px solid var(--color-gray-400);
 
     &:focus-visible {
       outline: var(--focus-ring);

Diff for: packages/next/src/client/components/react-dev-overlay/_experimental/internal/components/dialog/styles.ts

@@ -5,9 +5,10 @@ const styles = css`
     --next-dialog-radius: var(--rounded-xl);
     --next-dialog-footer-height: 48px;
     --next-dialog-max-width: 960px;
+    --next-dialog-row-padding: 16px;
 
     display: flex;
-    flex-direction: column;
+    flex-direction: column-reverse;
     width: 100%;
     max-height: calc(100% - 56px);
     max-width: var(--next-dialog-max-width);
@@ -48,6 +49,7 @@ const styles = css`
   }
 
   [data-nextjs-dialog-content] {
+    overflow-y: auto;
     border: none;
     margin: 0;
     display: flex;
@@ -62,7 +64,8 @@ const styles = css`
 
   [data-nextjs-dialog-content] > [data-nextjs-dialog-header] {
     flex-shrink: 0;
-    padding: var(--size-4);
+    padding: var(--next-dialog-row-padding);
+    padding-bottom: 0;
   }
 
   [data-nextjs-dialog-content] > [data-nextjs-dialog-body] {

Diff for: packages/next/src/client/components/react-dev-overlay/_experimental/internal/components/errors/call-stack/call-stack.tsx

@@ -2,18 +2,15 @@ import type { OriginalStackFrame } from '../../../../../internal/helpers/stack-f
 import { useMemo, useState, useRef } from 'react'
 import { CallStackFrame } from '../../call-stack-frame/call-stack-frame'
 import { noop as css } from '../../../helpers/noop-template'
-import { useMeasureHeight } from '../../../hooks/use-measure-height'
 
 interface CallStackProps {
   frames: OriginalStackFrame[]
   dialogResizerRef: React.RefObject<HTMLDivElement | null>
 }
 
 export function CallStack({ frames, dialogResizerRef }: CallStackProps) {
-  const ignoreListRef = useRef<HTMLDivElement | null>(null)
   const initialDialogHeight = useRef<number>(NaN)
   const [isIgnoreListOpen, setIsIgnoreListOpen] = useState(false)
-  const [ignoreListHeight] = useMeasureHeight(ignoreListRef)
 
   const { visibleFrames, ignoredFrames, ignoreListLength } = useMemo(() => {
     const visible: OriginalStackFrame[] = []
@@ -50,14 +47,13 @@ export function CallStack({ frames, dialogResizerRef }: CallStackProps) {
 
     if (isIgnoreListOpen) {
       function onTransitionEnd() {
-        setIsIgnoreListOpen(false)
         dialog.removeEventListener('transitionend', onTransitionEnd)
+        setIsIgnoreListOpen(false)
       }
       dialog.style.height = `${initialDialogHeight.current}px`
       dialog.addEventListener('transitionend', onTransitionEnd)
     } else {
-      dialog.style.height = `${initialDialogHeight.current + ignoreListHeight}px`
-      setIsIgnoreListOpen(!isIgnoreListOpen)
+      setIsIgnoreListOpen(true)
     }
   }
 
@@ -81,27 +77,25 @@ export function CallStack({ frames, dialogResizerRef }: CallStackProps) {
           </button>
         )}
       </div>
-      <div className="error-overlay-call-stack-body">
-        {visibleFrames.map((frame, frameIndex) => (
-          <CallStackFrame
-            key={`call-stack-leading-${frameIndex}`}
-            frame={frame}
-            index={frameIndex}
-          />
-        ))}
-
-        {isIgnoreListOpen && (
-          <div ref={ignoreListRef}>
-            {ignoredFrames.map((frame, frameIndex) => (
-              <CallStackFrame
-                key={`call-stack-ignored-${frameIndex}`}
-                frame={frame}
-                index={frameIndex}
-              />
-            ))}
-          </div>
-        )}
-      </div>
+      {visibleFrames.map((frame, frameIndex) => (
+        <CallStackFrame
+          key={`call-stack-leading-${frameIndex}`}
+          frame={frame}
+          index={frameIndex}
+        />
+      ))}
+
+      {isIgnoreListOpen && (
+        <>
+          {ignoredFrames.map((frame, frameIndex) => (
+            <CallStackFrame
+              key={`call-stack-ignored-${frameIndex}`}
+              frame={frame}
+              index={frameIndex}
+            />
+          ))}
+        </>
+      )}
     </div>
   )
 }
@@ -128,33 +122,20 @@ function ChevronUpDown() {
 export const CALL_STACK_STYLES = css`
   .error-overlay-call-stack-container {
     position: relative;
-  }
-
-  .error-overlay-call-stack-body {
     padding: var(--size-4) var(--size-3);
-    padding-top: 0;
     /* To optically align last item */
     padding-bottom: 8px;
+    position: relative;
   }
 
   .error-overlay-call-stack-header {
     display: flex;
     justify-content: space-between;
     align-items: center;
     min-height: 28px;
-    padding: var(--size-4) var(--size-5) var(--size-3) var(--size-4);
-    background: rgba(255, 255, 255, 0.7);
-    mask-image: linear-gradient(to top, transparent, #000 12%);
-    backdrop-filter: blur(8px);
+    margin-bottom: var(--size-3);
+    padding: 0 var(--size-2);
     width: 100%;
-    position: fixed;
-    position: sticky;
-    top: 0;
-    z-index: 2;
-
-    @media (prefers-color-scheme: dark) {
-      background: #0a0a0a70;
-    }
   }
 
   .error-overlay-call-stack-title {

Diff for: packages/next/src/client/components/react-dev-overlay/_experimental/internal/components/errors/dialog/dialog.tsx

@@ -2,14 +2,12 @@ import { Dialog } from '../../dialog/dialog'
 import { noop as css } from '../../../helpers/noop-template'
 
 type ErrorOverlayDialogProps = {
-  isTurbopack?: boolean
   children?: React.ReactNode
   onClose?: () => void
   dialogResizerRef?: React.RefObject<HTMLDivElement | null>
 }
 
 export function ErrorOverlayDialog({
-  isTurbopack,
   children,
   onClose,
   ...props
@@ -21,7 +19,6 @@ export function ErrorOverlayDialog({
       aria-describedby="nextjs__container_errors_desc"
       onClose={onClose}
       className="error-overlay-dialog"
-      data-turbo={isTurbopack}
       {...props}
     >
       {children}
@@ -44,26 +41,12 @@ export const DIALOG_STYLES = css`
       border-color: var(--color-gray-400);
     }
 
-    &[data-turbo='true']::after {
-      content: '';
-      --size: 1px;
-      --gradient: linear-gradient(
-        to right top,
-        transparent 75%,
-        var(--color-turbopack-border-blue) 87.5%,
-        var(--color-turbopack-border-red) 100%
-      );
-      position: absolute;
-      inset: -1px;
-      pointer-events: none;
-      border-radius: var(--next-dialog-radius);
-      padding: var(--size);
-      background: var(--gradient);
-      mask:
-        linear-gradient(black, black) content-box,
-        linear-gradient(black, black);
-      -webkit-mask-composite: xor;
-      mask-composite: exclude;
+    &:has(~ .error-overlay-nav .error-overlay-notch[data-side='left']) {
+      border-top-left-radius: 0;
+    }
+
+    &:has(~ .error-overlay-nav .error-overlay-notch[data-side='right']) {
+      border-top-right-radius: 0;
     }
   }
 `

Diff for: packages/next/src/client/components/react-dev-overlay/_experimental/internal/components/errors/dialog/header.tsx

@@ -1,23 +1,15 @@
 import { DialogHeader } from '../../dialog/dialog-header'
 import { noop as css } from '../../../helpers/noop-template'
-import { cx } from '../../../helpers/cx'
 
 type ErrorOverlayDialogHeaderProps = {
   children?: React.ReactNode
-  isTurbopack?: boolean
 }
 
 export function ErrorOverlayDialogHeader({
   children,
-  isTurbopack,
 }: ErrorOverlayDialogHeaderProps) {
   return (
-    <DialogHeader
-      className={cx(
-        'nextjs-container-errors-header',
-        isTurbopack && 'nextjs-error-overlay-dialog-header-turbopack-background'
-      )}
-    >
+    <DialogHeader className="nextjs-container-errors-header">
       {children}
     </DialogHeader>
   )
@@ -56,13 +48,4 @@ export const DIALOG_HEADER_STYLES = css`
     top: var(--size-4);
     right: var(--size-4);
   }
-
-  .nextjs-error-overlay-dialog-header-turbopack-background {
-    background-image: linear-gradient(
-      10deg,
-      var(--color-background-100) 60%,
-      var(--color-turbopack-background-red) 75%,
-      var(--color-turbopack-background-blue) 100%
-    );
-  }
 `