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⌨️@codemirror 6 component for@vuejs. Vue2 & Vue3 both supported.

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logue/vue-codemirror6

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A component for usingCodeMirror6 with Vue. This component works in both Vue2 and Vue3.

Usage

yarn add vue-codemirror6 codemirror

For Vue 2.7 or below,@vue/composition-api is required separately.

yarn add vue-codemirror6 @vue/composition-api

This component can handle bidirectional binding byv-model like a general Vue component.

Props

PropsTypeInformation
model-valuestring | TextText value. (Notvalue)
basicbooleanUsebasicSetup.
minimalbooleanUseminiSetup. If abasic prop is also specified, that setting will take precedence.
darkbooleanToggle Darkmode.
placeholderstringAdd placeholder text (or HTML DOM) when blank
wrapbooleanLine text wrapping. seelineWrapping.
tabbooleanEnables tab indentation.
allow-multiple-selectionsbooleanAllow Multiple Selection. SeeallowMultipleSelections
tab-sizenumberConfigures the tab size to use in this state.
line-separatorstringSet line break (separetor) char. (Default is\n.)
theme{ [selector: string]: StyleSpec }Specify the theme. For example, if you use@codemirror/theme-one-dark, importoneDark and put it in this prop.
readonlybooleanMakes the cursor visible or you can drag the text but not edit the value.
disabledbooleanThis is the reversed value of the CodeMirror editable. Similar toreadonly, but setting this value to true disables dragging.
langLanguageSupportThe language you want to have syntax highlighting. seehttps://codemirror.net/6/#languages
phrasesRecord<string, string>Specify here if you want to make the displayed character string multilingual. seehttps://codemirror.net/6/examples/translate/
extensionsExtension[]Includes enhancements to extend CodeMirror.
linterLintSourceSet Linter. Enter a linter (egesLint([arbitrary rule]) function for@codemirror/lang-javascript,jsonParseLinter()function for@codemirror/json). See the sources for various language libraries for more information.
linterConfigObjectseehttps://codemirror.net/docs/ref/#lint.linter^config
forceLintingbooleanseehttps://codemirror.net/docs/ref/#lint.forceLinting
gutterbooleanDisplay 🔴 on the line where there was an error whenlinter was specified. It will not work iflinter is not specified.
gutterConfigObjectseehttps://codemirror.net/docs/ref/#lint.lintGutter^config
tagstringHTML tags used in the component. (Default isdiv tag.)
scrollIntoViewbooleanAllows an external update to scroll the form. (Default istrue)
keymapKeyBinding[]Key bindings associate key names with command-style functions. Seehttps://codemirror.net/docs/ref/#view.KeyBinding

⚠ Notice:lang andlinter can also be set together inextensions. These are separated for compatibility with previous versions of CodeMirror settings and for typing props.

Supported Languages

Official

Unofficial

Supported Themes

Example

Mark up as follows to make it work at a minimum.

<template>  <code-mirrorv-model="value" /></template><script>import {ref,defineComponent }from'vue';importCodeMirrorfrom'vue-codemirror6';exportdefaultdefineComponent({  components: {    CodeMirror,  },setup() {constvalue=ref('Cozy lummox gives smart squid who asks for job pen.');return { value };  },});</script>

Example using Slots

The contents of the slot will overwrite the existingv-model. For this reason, it is recommended to use it when simply displaying with areadonly prop without usingv-model.

Also, insert a<pre> tag to prevent the text in the slot from being automatically formatted.

<template>  <code-mirror:lang="lang":linter="linter">    <pre>{  "key": "value"}</pre    >  </code-mirror></template><script>import {ref,defineComponent }from'vue';import {json,jsonParseLinter }from'@codemirror/lang-json';importCodeMirrorfrom'vue-codemirror6';exportdefaultdefineComponent({  components: {    CodeMirror,  },setup() {constlang=json();constlinter=jsonParseLinter();return { lang, linter };  },});</script>

Using with SSR (Nuxt.js, etc.)

This component is now SSR-compatible. CodeMirror will only be initialized on the client side, and the component will safely render without errors during server-side rendering.

If you're using Nuxt 3, you can use the component directly:

<template>  <code-mirrorv-model="value":lang="lang" /></template><script setup lang="ts">import {ref }from'vue';importCodeMirrorfrom'vue-codemirror6';import {javascript }from'@codemirror/lang-javascript';const value=ref('console.log("Hello, World!");');const lang=javascript();</script>

For Nuxt 2 or if you encounter any issues, you can wrap the component with<ClientOnly>:

<template>  <client-only>    <code-mirrorv-model="value":lang="lang" />  </client-only></template>

Full Example

When using as a Markdown editor onvite-vue3-ts-starter.

<script lang="ts" setup>import {ref,defineComponent,typeRef }from'vue';// Load componentimportCodeMirrorfrom'vue-codemirror6';// CodeMirror extensionsimport {markdownasmd }from'@codemirror/lang-markdown';importtype {LanguageSupport }from'@codemirror/language';importtype {Extension }from'@codemirror/state';importtype {ViewUpdate }from'@codemirror/view';/** text*/const value:Ref<string>=ref('');/** Dark mode **/const dark:Ref<boolean>=ref(window.matchMedia('(prefers-color-scheme: dark)').matches);/** * CodeMirror Language * *@see{@linkhttps://codemirror.net/6/docs/ref/#language | @codemirror/language}*/const lang:LanguageSupport=md();/** * Internationalization Config. * In this example, the display language to Japanese. * Must be reactive when used in combination with vue-i18n. * *@see{@linkhttps://codemirror.net/6/examples/translate/ | Example: Internationalization}*/const phrases:Record<string,string>= {// @codemirror/view'Control character':'制御文字',// @codemirror/commands'Selection deleted':'選択を削除',// @codemirror/language'Folded lines':'折り畳まれた行','Unfolded lines':'折り畳める行',  to:'行き先','folded code':'折り畳まれたコード',  unfold:'折り畳みを解除','Fold line':'行を折り畳む','Unfold line':'行の折り畳む解除',// @codemirror/search'Go to line':'行き先の行',  go:'OK',  Find:'検索',  Replace:'置き換え',  next:'',  previous:'',  all:'すべて','match case':'一致条件','by word':'全文検索',  regexp:'正規表現',  replace:'置き換え','replace all':'すべてを置き換え',  close:'閉じる','current match':'現在の一致','replaced $ matches':'$ 件の一致を置き換え','replaced match on line $':'$ 行の一致を置き換え','on line':'した行',// @codemirror/autocomplete  Completions:'自動補完',// @codemirror/lint  Diagnostics:'エラー','No diagnostics':'エラーなし',};</script><template>  <code-mirrorv-model="value"basic:dark="dark":lang="lang":phrases="phrases"  /></template>

Events

EventDescription
readyWhen CodeMirror loaded.
focusWhen focus changed.
updateWhen CodeMirror state changed. ReturnsViewUpdate object.
changeValue changed. ReturnsEditorState

Parameter / Function

<script setup lang="ts">import {ref,onMounted,typeRef,typePropType }from'vue';importCodeMirrorfrom'vue-codemirror6';const cm:Ref<InstanceType<typeofCodeMirror>|undefined>=ref();onMounted(()=> {console.log(cm.value?.json);});</script><template>  <code-mirrorref="cm" /></template>
Function / ParameterDescription
viewGet and setEditorView.
selectionGet and set theEditorSelection instance.
cursorGet and set thecursor location.
jsonGet and set state to a JSON-serializable object.
focusGet and setfocus.
lint()Force run linter (Only iflinter prop is specified)
forceReconfigure()Re register all extensions.

CodeMirror5 backward compatible functions

The instructions below are compatible methods for those familiar withcodemirror5.Since the above method is usually sufficient, itsactive use is not recommended.

FunctionDescription
getRange(from?: number, to?: number)Get the text between the given points in the editor.
getLine(number: number)Get the content of line.
lineCount()Get the number of lines in the editor.
getCursor()Retrieve one end of the primary selection.
listSelections()Retrieves a list of all current selections.
getSelection()Get the currently selected code.
getSelections()The length of the given array should be the same as the number of active selections.
somethingSelected()Return true if any text is selected.
replaceRange(replacement: string | Text, from: number, to: number)Replace the part of the document between from and to with the given string.
replaceSelection(replacement: string | Text)Replace the selection(s) with the given string.
setCursor(position: number)Set the cursor position.
setSelection(anchor: number, head?: number)Set a single selection range.
setSelections(ranges: readonly SelectionRange[], primary?: number)Sets a new set of selections.
extendSelectionsBy(f: Function)Applies the given function to all existing selections, and calls extendSelections on the result.

Recommendations

Since CodeMirror has a relatively large capacity, when usingvite, it is recommended to set it to output as a separate file using themanualChunks option at build time as shown below.

constconfig:UserConfig={// ...build:{rollupOptions:{output:{manualChunks:{// ...codemirror:['vue-codemirror6'],'codemirror-lang':[// Add the following as needed.'@codemirror/lang-html','@codemirror/lang-javascript','@codemirror/lang-markdown',],// ...},},},},// ...};

Development

Testing

This project usesVitest for unit testing.

# Run testspnpmtest# Run tests in watch modepnpm test:watch# Run tests with UIpnpm test:ui# Run tests with coveragepnpm test:coverage

The test suite includes:

  • Component Tests: Testing basic rendering, props, events, and v-model binding
  • SSR Tests: Ensuring proper server-side rendering compatibility for Nuxt.js and other SSR frameworks
  • Method Tests: Verifying all exposed methods work correctly
  • Edge Cases: Testing error handling and unusual scenarios

LICENSE

©2022-2025 by Logue.Licensed under theMIT License.


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