fix(runtime-core): make useId() always return a string

yyx990803 · yyx990803 · commit a17709275464 · 2024-09-23T08:38:38.000+08:00
diff --git a/packages/runtime-core/src/helpers/useId.ts b/packages/runtime-core/src/helpers/useId.ts
@@ -4,7 +4,7 @@ import {
 } from '../component'
 import { warn } from '../warning'
 
-export function useId(): string | undefined {
+export function useId(): string {
   const i = getCurrentInstance()
   if (i) {
     return (i.appContext.config.idPrefix || 'v') + '-' + i.ids[0] + i.ids[1]++
@@ -14,6 +14,7 @@ export function useId(): string | undefined {
         `instance to be associated with.`,
     )
   }
+  return ''
 }
 
 /**

Original file line number	Diff line number	Diff line change
`@@ -4,7 +4,7 @@ import {`
`4`	`4`	`} from '../component'`
`5`	`5`	`import { warn } from '../warning'`
`6`	`6`
`7`		`-export function useId(): string \| undefined {`
	`7`	`+export function useId(): string {`
`8`	`8`	`const i = getCurrentInstance()`
`9`	`9`	`if (i) {`
`10`	`10`	`return (i.appContext.config.idPrefix \|\| 'v') + '-' + i.ids[0] + i.ids[1]++`
`@@ -14,6 +14,7 @@ export function useId(): string \| undefined {`
`14`	`14`	`instance to be associated with.`,
`15`	`15`	`)`
`16`	`16`	`}`
	`17`	`+ return ''`
`17`	`18`	`}`
`18`	`19`
`19`	`20`	`/**`