fix: export DiffOptions

docs/config/index.md

@@ -1645,6 +1645,29 @@ export default defineConfig({
 
 - **Type:** `string`
 - **CLI:** `--diff=<value>`
-- **Version:** Since Vitest 0.34.4
+- **Version:** Since Vitest 0.34.5
 
 Path to a diff config that will be used to generate diff interface. Useful if you want to customize diff display.
+
+:::code-group
+```ts [vitest.diff.ts]
+import type { DiffOptions } from 'vitest'
+import c from 'picocolors'
+
+export default {
+  aIndicator: c.bold('--'),
+  bIndicator: c.bold('++'),
+  omitAnnotationLines: true,
+} satisfies DiffOptions
+```
+
+```ts [vitest.config.js]
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({
+  test: {
+    diff: './vitest.diff.ts'
+  }
+})
+```
+:::

packages/vitest/src/types/index.ts

@@ -13,6 +13,7 @@ export type * from './worker'
 export type * from './general'
 export type * from './coverage'
 export type * from './benchmark'
+export { DiffOptions } from '@vitest/utils/diff'
 export type {
   EnhancedSpy,
   MockedFunction,