Skip to content

perf(code-block): debounce highlight updates with useDebounceFn #56

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Dec 1, 2025
Merged

perf(code-block): debounce highlight updates with useDebounceFn #56

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
34 changes: 19 additions & 15 deletions packages/elements/src/code-block/CodeBlock.vue
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
import type { BundledLanguage } from 'shiki'
import type { HTMLAttributes } from 'vue'
import { cn } from '@repo/shadcn-vue/lib/utils'
import { reactiveOmit } from '@vueuse/core'
import { reactiveOmit, useDebounceFn } from '@vueuse/core'
import { computed, onBeforeUnmount, provide, ref, watch } from 'vue'
import { CodeBlockKey } from './context'
import { highlightCode } from './utils'
Expand Down Expand Up @@ -31,23 +31,27 @@ provide(CodeBlockKey, {
let requestId = 0
let isUnmounted = false

watch(
() => [props.code, props.language, props.showLineNumbers] as const,
async ([code, language, showLineNumbers]) => {
requestId += 1
const currentId = requestId
const updateHighlight = useDebounceFn(async (code: string, language: BundledLanguage, showLineNumbers: boolean) => {
requestId += 1
const currentId = requestId

try {
const [light, dark] = await highlightCode(code, language, showLineNumbers)
try {
const [light, dark] = await highlightCode(code, language, showLineNumbers)

if (currentId === requestId && !isUnmounted) {
html.value = light
darkHtml.value = dark
}
}
catch (error) {
console.error('[CodeBlock] highlight failed', error)
if (currentId === requestId && !isUnmounted) {
html.value = light
darkHtml.value = dark
}
}
catch (error) {
console.error('[CodeBlock] highlight failed', error)
}
}, 100)

watch(
() => [props.code, props.language, props.showLineNumbers] as const,
([code, language, showLineNumbers]) => {
updateHighlight(code, language, showLineNumbers)
},
{ immediate: true },
)
Expand Down