diff --git a/src/renderer/components/Preview.vue b/src/renderer/components/Preview.vue
index fdb5056c..b95795f8 100644
--- a/src/renderer/components/Preview.vue
+++ b/src/renderer/components/Preview.vue
@@ -52,6 +52,7 @@ import { revealLineInCenter } from '@fe/services/editor'
 import { showExport, toUri } from '@fe/services/document'
 import { getContextMenuItems, toggleAutoPreview } from '@fe/services/view'
 import { useContextMenu } from '@fe/support/ui/context-menu'
+import { DOM_ATTR_NAME } from '@fe/support/constant'
 import { useI18n } from '@fe/services/i18n'
 import { getLogger } from '@fe/utils'
 import type { RenderEnv } from '@fe/types'
@@ -236,7 +237,7 @@ export default defineComponent({
         return
       }
 
-      const nodes = refViewWrapper.value!.querySelectorAll<HTMLElement>('.markdown-body .source-line')
+      const nodes = refViewWrapper.value!.querySelectorAll<HTMLElement>(`.markdown-body [${DOM_ATTR_NAME.SOURCE_LINE_START}]`)
       for (let i = 0; i < nodes.length; i++) {
         const el = nodes[i]
         const lineNumber = parseInt(el.dataset.sourceLine || '0')
diff --git a/src/renderer/context/index.ts b/src/renderer/context/index.ts
index a33a0b3b..289c671f 100644
--- a/src/renderer/context/index.ts
+++ b/src/renderer/context/index.ts
@@ -13,6 +13,7 @@ import * as base from '@fe/services/base'
 import * as api from '@fe/support/api'
 import * as embed from '@fe/support/embed'
 import * as args from '@fe/support/args'
+import * as constant from '@fe/support/constant'
 import * as doc from '@fe/services/document'
 import * as view from '@fe/services/view'
 import * as tree from '@fe/services/tree'
@@ -29,6 +30,7 @@ const ctx = {
   base,
   api,
   args,
+  constant,
   store,
   action,
   doc,
diff --git a/src/renderer/plugins/editor-attachment.ts b/src/renderer/plugins/editor-attachment.ts
index 6d83a5a3..460d345f 100644
--- a/src/renderer/plugins/editor-attachment.ts
+++ b/src/renderer/plugins/editor-attachment.ts
@@ -11,6 +11,7 @@ import { refreshTree } from '@fe/services/tree'
 import { upload } from '@fe/services/base'
 import { isSameRepo } from '@fe/services/document'
 import { useToast } from '@fe/support/ui/toast'
+import { DOM_CLASS_NAME } from '@fe/support/constant'
 import { t } from '@fe/services/i18n'
 
 async function uploadFile (file: any, asImage: boolean) {
@@ -24,7 +25,7 @@ async function uploadFile (file: any, asImage: boolean) {
   if (asImage) {
     insert(`![Img](${encodeMarkdownLink(assetPath)})\n`)
   } else {
-    insert(`[${dayjs().format('YYYY-MM-DD HH:mm')}] [${file.name} (${(file.size / 1024).toFixed(2)}KiB)](${encodeMarkdownLink(assetPath)}){.open}\n`)
+    insert(`[${dayjs().format('YYYY-MM-DD HH:mm')}] [${file.name} (${(file.size / 1024).toFixed(2)}KiB)](${encodeMarkdownLink(assetPath)}){.${DOM_CLASS_NAME.MARK_OPEN}}\n`)
   }
 
   refreshTree()
diff --git a/src/renderer/plugins/markdown-applet.ts b/src/renderer/plugins/markdown-applet.ts
index 071d6f0f..bea7a110 100644
--- a/src/renderer/plugins/markdown-applet.ts
+++ b/src/renderer/plugins/markdown-applet.ts
@@ -40,7 +40,7 @@ const MarkdownItPlugin = (md: Markdown) => {
       },
       iframeProps: {
         ...token.meta?.attrs,
-        class: 'source-line applet-iframe',
+        class: 'applet-iframe',
         height: '20px',
       }
     })
diff --git a/src/renderer/plugins/markdown-echarts.ts b/src/renderer/plugins/markdown-echarts.ts
index 46d4f64d..36204ce4 100644
--- a/src/renderer/plugins/markdown-echarts.ts
+++ b/src/renderer/plugins/markdown-echarts.ts
@@ -138,7 +138,7 @@ const Echarts = defineComponent({
         return h('img', { src: imgSrc.value })
       }
 
-      return h('div', { ...props.attrs, class: 'source-line echarts-wrapper' }, [
+      return h('div', { ...props.attrs, class: 'echarts-wrapper' }, [
         h('div', { class: 'echarts-action no-print' }, [
           h('button', { class: 'small', onClick: () => exportData('png') }, 'PNG'),
         ]),
diff --git a/src/renderer/plugins/markdown-katex.ts b/src/renderer/plugins/markdown-katex.ts
index a85baa67..fb358ffb 100644
--- a/src/renderer/plugins/markdown-katex.ts
+++ b/src/renderer/plugins/markdown-katex.ts
@@ -185,7 +185,7 @@ function math_plugin (md: any, options: any) {
     options.displayMode = true
     try {
       const html = katex.renderToString(latex, options)
-      return h('p', { ...token.meta?.attrs, class: 'source-line', key: html, innerHTML: html }, '')
+      return h('p', { ...token.meta?.attrs, key: html, innerHTML: html }, '')
     } catch (error: any) {
       if (options.throwOnError) { console.warn(error) }
       return h('code', {}, `${error.message} [${latex}]`)
diff --git a/src/renderer/plugins/markdown-link.ts b/src/renderer/plugins/markdown-link.ts
index f748987f..359fc882 100644
--- a/src/renderer/plugins/markdown-link.ts
+++ b/src/renderer/plugins/markdown-link.ts
@@ -4,6 +4,7 @@ import { Plugin } from '@fe/context'
 import store from '@fe/support/store'
 import { sleep } from '@fe/utils'
 import { isElectron } from '@fe/support/env'
+import { DOM_ATTR_NAME, DOM_CLASS_NAME } from '@fe/support/constant'
 import { basename, dirname, join, resolve } from '@fe/utils/path'
 import { switchDoc } from '@fe/services/document'
 import { getRepo, openExternal, openPath } from '@fe/services/base'
@@ -27,8 +28,8 @@ const handleLink = (link: HTMLAnchorElement, view: HTMLElement) => {
   } else if (/^file:\/\//i.test(href)) {
     openPath(decodeURI(href.replace(/^file:\/\//i, '')))
     return true
-  } else if (link.classList.contains('open')) {
-    const path = link.getAttribute('origin-href') || decodeURI(href)
+  } else if (link.classList.contains(DOM_CLASS_NAME.MARK_OPEN)) {
+    const path = link.getAttribute(DOM_ATTR_NAME.ORIGIN_HREF) || decodeURI(href)
     openPath(join(getRepo(fileRepo)?.path || '/', path))
     return true
   } else { // relative link
@@ -97,7 +98,8 @@ function convertLink (state: StateCore) {
   }
 
   const link = (token: Token) => {
-    const attrName = token.tag === 'a' ? 'href' : 'src'
+    const isAnchor = token.tag === 'a'
+    const attrName = isAnchor ? 'href' : 'src'
     const attrVal = decodeURIComponent(token.attrGet(attrName) || '')
     if (!attrVal) {
       return
@@ -110,7 +112,7 @@ function convertLink (state: StateCore) {
     const basePath = dirname(path)
     const fileName = basename(attrVal)
 
-    if (token.tag === 'a') {
+    if (isAnchor) {
       // keep markdown file.
       if (fileName.endsWith('.md')) {
         return
@@ -122,10 +124,13 @@ function convertLink (state: StateCore) {
       }
 
       // open other file in os
-      token.attrPush(['class', 'open'])
+      token.attrPush(['class', DOM_CLASS_NAME.MARK_OPEN])
+    } else {
+      token.attrSet(DOM_ATTR_NAME.LOCAL_IMAGE, 'true')
     }
 
-    token.attrSet(`origin-${attrName}`, attrVal)
+    const originAttr = isAnchor ? DOM_ATTR_NAME.ORIGIN_HREF : DOM_ATTR_NAME.ORIGIN_SRC
+    token.attrSet(originAttr, attrVal)
 
     const val = attrVal.replace(/[#?].*$/, '')
 
@@ -166,15 +171,15 @@ export default {
     }
 
     ctx.registerHook('VIEW_ON_GET_HTML_FILTER_NODE', async ({ node, options }) => {
-      const srcAttr = node.getAttribute('src')
       // local image
-      if (srcAttr?.startsWith('api/')) {
+      const srcAttr = node.getAttribute('src')
+      if (srcAttr && node.getAttribute(DOM_ATTR_NAME.LOCAL_IMAGE)) {
         if (options.inlineLocalImage) {
           try {
             const res: Response = await ctx.api.fetchHttp(srcAttr)
             const base64Url = await ctx.utils.fileToBase64URL(await res.blob())
             node.setAttribute('src', base64Url)
-            node.removeAttribute('origin-src')
+            node.removeAttribute(DOM_ATTR_NAME.ORIGIN_SRC)
           } catch (error) {
             console.log(error)
           }
@@ -183,10 +188,10 @@ export default {
         }
       }
 
-      const originSrc = node.getAttribute('origin-src')
+      const originSrc = node.getAttribute(DOM_ATTR_NAME.ORIGIN_SRC)
       if (originSrc) {
         node.setAttribute('src', originSrc)
-        node.removeAttribute('origin-src')
+        node.removeAttribute(DOM_ATTR_NAME.ORIGIN_SRC)
       }
     })
 
diff --git a/src/renderer/plugins/markdown-luckysheet.ts b/src/renderer/plugins/markdown-luckysheet.ts
index a834e361..a36ea198 100644
--- a/src/renderer/plugins/markdown-luckysheet.ts
+++ b/src/renderer/plugins/markdown-luckysheet.ts
@@ -13,6 +13,7 @@ import { refreshTree } from '@fe/services/tree'
 import { buildSrc, IFrame } from '@fe/support/embed'
 import { getCurrentLanguage, t, useI18n } from '@fe/services/i18n'
 import { FLAG_DEMO } from '@fe/support/args'
+import { DOM_ATTR_NAME } from '@fe/support/constant'
 import Mask from '@fe/components/Mask.vue'
 
 const logger = getLogger('plugin-markdown-luckysheet')
@@ -330,7 +331,7 @@ const MarkdownItPlugin = (md: Markdown) => {
       return linkTemp(tokens, idx, options, env, slf)
     }
 
-    const url = token.attrGet('origin-href')
+    const url = token.attrGet(DOM_ATTR_NAME.ORIGIN_HREF)
     if (!url || url.includes(':')) {
       return linkTemp(tokens, idx, options, env, slf)
     }
diff --git a/src/renderer/plugins/markdown-mermaid.ts b/src/renderer/plugins/markdown-mermaid.ts
index d453d389..c9e30abb 100644
--- a/src/renderer/plugins/markdown-mermaid.ts
+++ b/src/renderer/plugins/markdown-mermaid.ts
@@ -53,7 +53,7 @@ const Mermaid = defineComponent({
     onMounted(() => setTimeout(render, 0))
 
     return () => {
-      return h('div', { ...props.attrs, class: 'source-line mermaid-wrapper' }, [
+      return h('div', { ...props.attrs, class: 'mermaid-wrapper' }, [
         h('div', { class: 'mermaid-action no-print' }, [
           h('button', { class: 'small', onClick: () => exportData() }, 'SVG'),
         ]),
diff --git a/src/renderer/plugins/markdown-mind-map.ts b/src/renderer/plugins/markdown-mind-map.ts
index dcf86419..734ebd7e 100644
--- a/src/renderer/plugins/markdown-mind-map.ts
+++ b/src/renderer/plugins/markdown-mind-map.ts
@@ -367,7 +367,7 @@ const MindMap = defineComponent({
       removeHook('I18N_CHANGE_LANGUAGE', onLanguageChange)
     })
 
-    return () => h('div', { ...props.attrs, ref: container, class: 'source-line mind-map reduce-brightness' })
+    return () => h('div', { ...props.attrs, ref: container, class: 'mind-map reduce-brightness' })
   }
 })
 
diff --git a/src/renderer/plugins/markdown-plantuml.ts b/src/renderer/plugins/markdown-plantuml.ts
index cff5ea0e..77036307 100644
--- a/src/renderer/plugins/markdown-plantuml.ts
+++ b/src/renderer/plugins/markdown-plantuml.ts
@@ -193,7 +193,7 @@ const Plantuml = defineComponent({
         ...props.attrs,
         ref: img,
         alt: 'plantuml',
-        class: 'source-line plantuml-img',
+        class: 'plantuml-img',
         style,
         src: src.value,
         onLoad
diff --git a/src/renderer/plugins/markdown-render-vnode.ts b/src/renderer/plugins/markdown-render-vnode.ts
index e224b67d..838e2954 100644
--- a/src/renderer/plugins/markdown-render-vnode.ts
+++ b/src/renderer/plugins/markdown-render-vnode.ts
@@ -1,8 +1,9 @@
 import { createVNode, Fragment, Comment, Text, VNode } from 'vue'
-import Token from 'markdown-it/lib/token'
-import Renderer from 'markdown-it/lib/renderer'
+import type Token from 'markdown-it/lib/token'
+import type Renderer from 'markdown-it/lib/renderer'
 import { escapeHtml, unescapeAll } from 'markdown-it/lib/common/utils'
-import { Plugin } from '@fe/context'
+import { DOM_ATTR_NAME } from '@fe/support/constant'
+import type { Plugin } from '@fe/context'
 
 const attrNameReg = /^[a-zA-Z_:][a-zA-Z0-9:._-]*$/
 const defaultRules = {} as any
@@ -36,9 +37,8 @@ export function setSourceLine (token: Token, env?: Record<string, any>) {
     const [lineStart, lineEnd] = getLine(token, env)
 
     if (token.map) {
-      token.attrJoin('class', 'source-line')
-      token.attrSet('data-source-line', String(lineStart + 1))
-      token.attrSet('data-source-line-end', String(lineEnd + 1))
+      token.attrSet(DOM_ATTR_NAME.SOURCE_LINE_START, String(lineStart + 1))
+      token.attrSet(DOM_ATTR_NAME.SOURCE_LINE_END, String(lineEnd + 1))
       if (!token.meta.attrs) {
         token.meta.attrs = {}
       }
@@ -58,9 +58,17 @@ defaultRules.code_inline = function (tokens: Token[], idx: number, _: any, __: a
 defaultRules.code_block = function (tokens: Token[], idx: number, _: any, __: any, slf: Renderer) {
   const token = tokens[idx]
   const attrs: any = slf.renderAttrs(token)
+  const preAttrs = {
+    [DOM_ATTR_NAME.SOURCE_LINE_START]: attrs[DOM_ATTR_NAME.SOURCE_LINE_START],
+    [DOM_ATTR_NAME.SOURCE_LINE_END]: attrs[DOM_ATTR_NAME.SOURCE_LINE_END],
+  }
+
+  delete attrs[DOM_ATTR_NAME.SOURCE_LINE_START]
+  delete attrs[DOM_ATTR_NAME.SOURCE_LINE_END]
+
   return createVNode(
     'pre',
-    {},
+    preAttrs,
     [createVNode('code', attrs, [createVNode(Text, {}, token.content)])]
   )
 }
@@ -88,11 +96,23 @@ defaultRules.fence = function (tokens: Token[], idx: number, options: any, _: an
     return highlighted + '\n'
   }
 
-  const buildVNode = (attrs: any) => createVNode(
-    'pre',
-    { 'data-info': info, 'data-lang': langName },
-    [createVNode('code', { key: highlighted, ...attrs, innerHTML: highlighted }, [])]
-  )
+  const buildVNode = (attrs: any) => {
+    const preAttrs = {
+      'data-info': info,
+      'data-lang': langName,
+      [DOM_ATTR_NAME.SOURCE_LINE_START]: attrs[DOM_ATTR_NAME.SOURCE_LINE_START],
+      [DOM_ATTR_NAME.SOURCE_LINE_END]: attrs[DOM_ATTR_NAME.SOURCE_LINE_END],
+    }
+
+    delete attrs[DOM_ATTR_NAME.SOURCE_LINE_START]
+    delete attrs[DOM_ATTR_NAME.SOURCE_LINE_END]
+
+    return createVNode(
+      'pre',
+      preAttrs,
+      [createVNode('code', { key: highlighted, ...attrs, innerHTML: highlighted }, [])]
+    )
+  }
 
   // If language exists, inject class gently, without modifying original token.
   // May be, one day we will add .deepClone() for token and simplify this part, but
@@ -272,9 +292,5 @@ export default {
       md.renderer.renderAttrs = renderAttrs
       md.renderer.renderToken = renderToken
     })
-
-    ctx.registerHook('VIEW_ON_GET_HTML_FILTER_NODE', ({ node }) => {
-      node.classList.remove('source-line')
-    })
   }
 } as Plugin
diff --git a/src/renderer/plugins/switch-todo.ts b/src/renderer/plugins/switch-todo.ts
index 2c1014d9..08d5aacb 100644
--- a/src/renderer/plugins/switch-todo.ts
+++ b/src/renderer/plugins/switch-todo.ts
@@ -39,7 +39,7 @@ export default {
         return true
       }
 
-      if (target.tagName === 'INPUT' && target.parentElement!.classList.contains('source-line')) {
+      if (target.tagName === 'INPUT' && target.parentElement!.dataset.sourceLine) {
         const line = parseInt(target.parentElement!.dataset.sourceLine || '0')
         const checked = (target as HTMLInputElement).checked
         ctx.action.getActionHandler(actionName)(line, checked)
diff --git a/src/renderer/plugins/sync-scroll.ts b/src/renderer/plugins/sync-scroll.ts
index 7a33b414..3cdf0c0d 100644
--- a/src/renderer/plugins/sync-scroll.ts
+++ b/src/renderer/plugins/sync-scroll.ts
@@ -66,7 +66,7 @@ export default {
       if (
         ctx.store.state.showEditor &&
         !ctx.store.state.presentation &&
-        target.classList.contains('source-line') &&
+        target.dataset.sourceLine &&
         window.getSelection()!.toString().length < 1
       ) {
         ctx.view.disableSyncScrollAwhile(() => {
diff --git a/src/renderer/support/constant.ts b/src/renderer/support/constant.ts
new file mode 100644
index 00000000..f50fdaa1
--- /dev/null
+++ b/src/renderer/support/constant.ts
@@ -0,0 +1,11 @@
+export const DOM_ATTR_NAME = {
+  SOURCE_LINE_START: 'data-source-line',
+  SOURCE_LINE_END: 'data-source-line-end',
+  ORIGIN_SRC: 'origin-src',
+  ORIGIN_HREF: 'origin-href',
+  LOCAL_IMAGE: 'local-image',
+}
+
+export const DOM_CLASS_NAME = {
+  MARK_OPEN: 'open'
+}