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安装

使用的版本:"codemirror": "^5.65.12"

Shell
pnpm i codemirror
pnpm i codemirror

codeMirror.vue封装

整体文件

Vue
<template>
    <div class="relative !h-full w-full overflow-hidden" ref="el"></div>
</template>

<script setup>
import {
    ref,
    onMounted,
    onUnmounted,
    watchEffect,
    watch,
    nextTick
} from 'vue'
import { useWindowSizeFn } from './useWindowSizeFn'
import { useDebounceFn } from '@vueuse/core'
import CodeMirror from 'codemirror'
// css
import './codemirror.css'
import 'codemirror/theme/idea.css'
// mode
import 'codemirror/mode/javascript/javascript'
import 'codemirror/addon/edit/closebrackets'
import 'codemirror/addon/edit/matchbrackets.js'

const props = defineProps({
    mode: {
        type: String,
        default: 'application/json'
    },
    value: {
        type: String,
        default: ''
    },
    options: {
        type: Object,
        default: () => ({})
    },
    readOnly: {
        type: Boolean,
        default: false
    }
})

const emit = defineEmits(['change'])

const el = ref()
let editor

const debounceRefresh = useDebounceFn(refresh, 100)

watch(
    () => props.value,
    async value => {
        await nextTick()
        const oldValue = editor?.getValue()
        if (value !== oldValue) {
            editor?.setValue(value ? value : '')
        }
    },
    { flush: 'post' }
)

watchEffect(() => {
    editor?.setOption('mode', props.mode)
})

function refresh () {
    editor?.refresh()
}

function getValue () {
    return editor?.getValue()
}

async function init () {
    const { mode, readOnly, value, options } = props

    editor = CodeMirror(el.value, {
        value,
        mode,
        readOnly,
        tabSize: 2,
        theme: 'idea',
        lineWrapping: true,
        lineNumbers: true,
        matchBrackets: true, // 括号匹配
        autoCloseBrackets: true, // 自动补全括号
        autoCloseTags: true,
        foldGutter: true,
        gutters: ['CodeMirror-linenumbers'],
        ...options
    })
    editor?.on('change', () => {
        emit('change', editor?.getValue())
    })
}

onMounted(async () => {
    await nextTick()
    init()
    useWindowSizeFn(debounceRefresh)
})

onUnmounted(() => {
    editor = null
})

defineExpose({
    getValue,
    refresh
})
</script>
<template>
    <div class="relative !h-full w-full overflow-hidden" ref="el"></div>
</template>

<script setup>
import {
    ref,
    onMounted,
    onUnmounted,
    watchEffect,
    watch,
    nextTick
} from 'vue'
import { useWindowSizeFn } from './useWindowSizeFn'
import { useDebounceFn } from '@vueuse/core'
import CodeMirror from 'codemirror'
// css
import './codemirror.css'
import 'codemirror/theme/idea.css'
// mode
import 'codemirror/mode/javascript/javascript'
import 'codemirror/addon/edit/closebrackets'
import 'codemirror/addon/edit/matchbrackets.js'

const props = defineProps({
    mode: {
        type: String,
        default: 'application/json'
    },
    value: {
        type: String,
        default: ''
    },
    options: {
        type: Object,
        default: () => ({})
    },
    readOnly: {
        type: Boolean,
        default: false
    }
})

const emit = defineEmits(['change'])

const el = ref()
let editor

const debounceRefresh = useDebounceFn(refresh, 100)

watch(
    () => props.value,
    async value => {
        await nextTick()
        const oldValue = editor?.getValue()
        if (value !== oldValue) {
            editor?.setValue(value ? value : '')
        }
    },
    { flush: 'post' }
)

watchEffect(() => {
    editor?.setOption('mode', props.mode)
})

function refresh () {
    editor?.refresh()
}

function getValue () {
    return editor?.getValue()
}

async function init () {
    const { mode, readOnly, value, options } = props

    editor = CodeMirror(el.value, {
        value,
        mode,
        readOnly,
        tabSize: 2,
        theme: 'idea',
        lineWrapping: true,
        lineNumbers: true,
        matchBrackets: true, // 括号匹配
        autoCloseBrackets: true, // 自动补全括号
        autoCloseTags: true,
        foldGutter: true,
        gutters: ['CodeMirror-linenumbers'],
        ...options
    })
    editor?.on('change', () => {
        emit('change', editor?.getValue())
    })
}

onMounted(async () => {
    await nextTick()
    init()
    useWindowSizeFn(debounceRefresh)
})

onUnmounted(() => {
    editor = null
})

defineExpose({
    getValue,
    refresh
})
</script>

useWindowSizeFn.js 窗口改变监听hooks

JavaScript
import { tryOnMounted, tryOnUnmounted, useDebounceFn } from '@vueuse/core'

function useWindowSizeFn (fn, options = {}) {
    const { wait = 150, immediate } = options
    let handler = () => {
        fn()
    }
    const handleSize = useDebounceFn(handler, wait)
    handler = handleSize

    const start = () => {
        if (immediate) {
            handler()
        }
        window.addEventListener('resize', handler)
    }

    const stop = () => {
        window.removeEventListener('resize', handler)
    }

    tryOnMounted(() => {
        start()
    })

    tryOnUnmounted(() => {
        stop()
    })
    return { start, stop }
}

export { useWindowSizeFn }
import { tryOnMounted, tryOnUnmounted, useDebounceFn } from '@vueuse/core'

function useWindowSizeFn (fn, options = {}) {
    const { wait = 150, immediate } = options
    let handler = () => {
        fn()
    }
    const handleSize = useDebounceFn(handler, wait)
    handler = handleSize

    const start = () => {
        if (immediate) {
            handler()
        }
        window.addEventListener('resize', handler)
    }

    const stop = () => {
        window.removeEventListener('resize', handler)
    }

    tryOnMounted(() => {
        start()
    })

    tryOnUnmounted(() => {
        stop()
    })
    return { start, stop }
}

export { useWindowSizeFn }

codemirror.css

codemirror样式文件

CSS
/* BASICS */

.CodeMirror {
    --base: #545281;
    --comment: hsl(210deg 25% 60%);
    --keyword: #af4ab1;
    --variable: #0055d1;
    --function: #c25205;
    --string: #2ba46d;
    --number: #c25205;
    --tags: #d00;
    --qualifier: #ff6032;
    --important: var(--string);

    position: relative;
    height: auto;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-code);
    background: white;
    direction: ltr;
}

/* PADDING */

.CodeMirror-lines {
    min-height: 1px; /* prevents collapsing before first draw */
    padding: 4px 0; /* Vertical padding around content */
    cursor: text;
}

.CodeMirror-scrollbar-filler,
.CodeMirror-gutter-filler {
    background-color: white; /* The little square between H and V scrollbars */
}

/* GUTTER */

.CodeMirror-gutters {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 3;
    min-height: 100%;
    white-space: nowrap;
    background-color: transparent;
    border-right: 1px solid #ddd;
}

.CodeMirror-linenumber {
    min-width: 20px;
    padding: 0 3px 0 5px;
    color: var(--comment);
    text-align: right;
    white-space: nowrap;
    opacity: 0.6;
}

.CodeMirror-guttermarker {
    color: black;
}

.CodeMirror-guttermarker-subtle {
    color: #999;
}

/* FOLD GUTTER */

.CodeMirror-foldmarker {
    line-height: 0.3;
    color: #414141;
    text-shadow: #f96 1px 1px 2px, #f96 -1px -1px 2px, #f96 1px -1px 2px, #f96 -1px 1px 2px;
    cursor: pointer;
}

.CodeMirror-foldgutter {
    width: 0.7em;
}

.CodeMirror-foldgutter-open,
.CodeMirror-foldgutter-folded {
    cursor: pointer;
}

.CodeMirror-foldgutter-open::after,
.CodeMirror-foldgutter-folded::after {
    position: relative;
    top: -0.1em;
    display: inline-block;
    font-size: 0.8em;
    content: '>';
    opacity: 0.8;
    transform: rotate(90deg);
    transition: transform 0.2s;
}

.CodeMirror-foldgutter-folded::after {
    transform: none;
}

/* CURSOR */

.CodeMirror-cursor {
    position: absolute;
    width: 0;
    pointer-events: none;
    border-right: none;
    border-left: 1px solid black;
}

/* Shown when moving in bi-directional text */
.CodeMirror div.CodeMirror-secondarycursor {
    border-left: 1px solid silver;
}

.cm-fat-cursor .CodeMirror-cursor {
    width: auto;
    background: #7e7;
    border: 0 !important;
}

.cm-fat-cursor div.CodeMirror-cursors {
    z-index: 1;
}

.cm-fat-cursor-mark {
    background-color: rgb(20 255 20 / 50%);
    animation: blink 1.06s steps(1) infinite;
}

.cm-animate-fat-cursor {
    width: auto;
    background-color: #7e7;
    border: 0;
    animation: blink 1.06s steps(1) infinite;
}
@keyframes blink {
    50% {
        background-color: transparent;
    }
}
@keyframes blink {
    50% {
        background-color: transparent;
    }
}
@keyframes blink {
    50% {
        background-color: transparent;
    }
}

.cm-tab {
    display: inline-block;
    text-decoration: inherit;
}

.CodeMirror-rulers {
    position: absolute;
    inset: -50px 0 -20px;
    overflow: hidden;
}

.CodeMirror-ruler {
    position: absolute;
    top: 0;
    bottom: 0;
    border-left: 1px solid #ccc;
}

/* DEFAULT THEME */
.cm-s-default.CodeMirror {
    background-color: transparent;
}

.cm-s-default .cm-header {
    color: blue;
}

.cm-s-default .cm-quote {
    color: #090;
}

.cm-negative {
    color: #d44;
}

.cm-positive {
    color: #292;
}

.cm-header,
.cm-strong {
    font-weight: bold;
}

.cm-em {
    font-style: italic;
}

.cm-link {
    text-decoration: underline;
}

.cm-strikethrough {
    text-decoration: line-through;
}

.cm-s-default .cm-atom,
.cm-s-default .cm-def,
.cm-s-default .cm-property,
.cm-s-default .cm-variable-2,
.cm-s-default .cm-variable-3,
.cm-s-default .cm-punctuation {
    color: var(--base);
}

.cm-s-default .cm-hr,
.cm-s-default .cm-comment {
    color: var(--comment);
}

.cm-s-default .cm-attribute,
.cm-s-default .cm-keyword {
    color: var(--keyword);
}

.cm-s-default .cm-variable {
    color: var(--variable);
}

.cm-s-default .cm-bracket,
.cm-s-default .cm-tag {
    color: var(--tags);
}

.cm-s-default .cm-number {
    color: var(--number);
}

.cm-s-default .cm-string,
.cm-s-default .cm-string-2 {
    color: var(--string);
}

.cm-s-default .cm-type {
    color: #085;
}

.cm-s-default .cm-meta {
    color: #555;
}

.cm-s-default .cm-qualifier {
    color: var(--qualifier);
}

.cm-s-default .cm-builtin {
    color: #7539ff;
}

.cm-s-default .cm-link {
    color: var(--flash);
}

.cm-s-default .cm-error {
    color: #ff008c;
}

.cm-invalidchar {
    color: #ff008c;
}

.CodeMirror-composing {
    border-bottom: 2px solid;
}

/* Default styles for common addons */

div.CodeMirror span.CodeMirror-matchingbracket {
    color: #0b0;
}

div.CodeMirror span.CodeMirror-nonmatchingbracket {
    color: #a22;
}

.CodeMirror-matchingtag {
    background: rgb(255 150 0 / 30%);
}

.CodeMirror-activeline-background {
    background: #e8f2ff;
}

/* STOP */

/* The rest of this file contains styles related to the mechanics of
   the editor. You probably shouldn't touch them. */

.CodeMirror-scroll {
    position: relative;
    height: 100%;
    padding-bottom: 30px;
    margin-right: -30px;

    /* 30px is the magic margin used to hide the element's real scrollbars */

    /* See overflow: hidden in .CodeMirror */
    margin-bottom: -30px;
    overflow: scroll !important; /* Things will break if this is overridden */
    outline: none; /* Prevent dragging from highlighting the element */
}

.CodeMirror-sizer {
    position: relative;
    margin-bottom: 20px !important;
    border-right: 30px solid transparent;
}

/* The fake, visible scrollbars. Used to force redraw during scrolling
   before actual scrolling happens, thus preventing shaking and
   flickering artifacts. */
.CodeMirror-vscrollbar,
.CodeMirror-hscrollbar,
.CodeMirror-scrollbar-filler,
.CodeMirror-gutter-filler {
    position: absolute;
    z-index: 6;
    display: none;
}

.CodeMirror-vscrollbar {
    top: 0;
    right: 0;
    overflow-x: hidden;
    overflow-y: scroll;
}

.CodeMirror-hscrollbar {
    bottom: 0;
    left: 0;
    overflow-x: scroll;
    overflow-y: hidden;
}

.CodeMirror-scrollbar-filler {
    right: 0;
    bottom: 0;
}

.CodeMirror-gutter-filler {
    bottom: 0;
    left: 0;
}

.CodeMirror-gutter {
    display: inline-block;
    height: 100%;
    margin-bottom: -30px;
    white-space: normal;
    vertical-align: top;
}

.CodeMirror-gutter-wrapper {
    position: absolute;
    z-index: 4;
    background: none !important;
    border: none !important;
}

.CodeMirror-gutter-background {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 4;
}

.CodeMirror-gutter-elt {
    position: absolute;
    z-index: 4;
    cursor: default;
}

.CodeMirror-gutter-wrapper ::selection {
    background-color: transparent;
}

.CodeMirrorwrapper ::selection {
    background-color: transparent;
}

.CodeMirror pre {
    position: relative;
    z-index: 2;
    padding: 0 4px; /* Horizontal padding of content */
    margin: 0;
    overflow: visible;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    color: inherit;
    word-wrap: normal;
    white-space: pre;
    background: transparent;
    border-width: 0;

    /* Reset some styles that the rest of the page might have set */
    border-radius: 0;
    -webkit-tap-highlight-color: transparent;
    font-variant-ligatures: contextual;
}

.CodeMirror-wrap pre {
    word-break: normal;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.CodeMirror-linebackground {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.CodeMirror-linewidget {
    position: relative;
    z-index: 2;
    padding: 0.1px; /* Force widget margins to stay inside of the container */
}

.CodeMirror-rtl pre {
    direction: rtl;
}

.CodeMirror-code {
    outline: none;
}

/* Force content-box sizing for the elements where we expect it */
.CodeMirror-scroll,
.CodeMirror-sizer,
.CodeMirror-gutter,
.CodeMirror-gutters,
.CodeMirror-linenumber {
    box-sizing: content-box;
}

.CodeMirror-measure {
    position: absolute;
    width: 100%;
    height: 0;
    overflow: hidden;
    visibility: hidden;
}

.CodeMirror-measure pre {
    position: static;
}

div.CodeMirror-cursors {
    position: relative;
    z-index: 3;
    visibility: hidden;
}

div.CodeMirror-dragcursors {
    visibility: visible;
}

.CodeMirror-focused div.CodeMirror-cursors {
    visibility: visible;
}

.CodeMirror-selected {
    background: #d9d9d9;
}

.CodeMirror-focused .CodeMirror-selected {
    background: #d7d4f0;
}

.CodeMirror-crosshair {
    cursor: crosshair;
}

.CodeMirror-line::selection,
.CodeMirror-line > span::selection,
.CodeMirror-line > span > span::selection {
    background: #d7d4f0;
}

.cm-searching {
    background-color: #ffa;
    background-color: rgb(255 255 0 / 40%);
}

/* Used to force a border model for a node */
.cm-force-border {
    padding-right: 0.1px;
}

@media print {
    /* Hide the cursor when printing */
    .CodeMirror div.CodeMirror-cursors {
        visibility: hidden;
    }
}

/* See issue #2901 */
.cm-tab-wrap-hack::after {
    content: '';
}

/* Help users use markselection to safely style text background */
span.CodeMirror-selectedtext {
    background: none;
}
/* BASICS */

.CodeMirror {
    --base: #545281;
    --comment: hsl(210deg 25% 60%);
    --keyword: #af4ab1;
    --variable: #0055d1;
    --function: #c25205;
    --string: #2ba46d;
    --number: #c25205;
    --tags: #d00;
    --qualifier: #ff6032;
    --important: var(--string);

    position: relative;
    height: auto;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-code);
    background: white;
    direction: ltr;
}

/* PADDING */

.CodeMirror-lines {
    min-height: 1px; /* prevents collapsing before first draw */
    padding: 4px 0; /* Vertical padding around content */
    cursor: text;
}

.CodeMirror-scrollbar-filler,
.CodeMirror-gutter-filler {
    background-color: white; /* The little square between H and V scrollbars */
}

/* GUTTER */

.CodeMirror-gutters {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 3;
    min-height: 100%;
    white-space: nowrap;
    background-color: transparent;
    border-right: 1px solid #ddd;
}

.CodeMirror-linenumber {
    min-width: 20px;
    padding: 0 3px 0 5px;
    color: var(--comment);
    text-align: right;
    white-space: nowrap;
    opacity: 0.6;
}

.CodeMirror-guttermarker {
    color: black;
}

.CodeMirror-guttermarker-subtle {
    color: #999;
}

/* FOLD GUTTER */

.CodeMirror-foldmarker {
    line-height: 0.3;
    color: #414141;
    text-shadow: #f96 1px 1px 2px, #f96 -1px -1px 2px, #f96 1px -1px 2px, #f96 -1px 1px 2px;
    cursor: pointer;
}

.CodeMirror-foldgutter {
    width: 0.7em;
}

.CodeMirror-foldgutter-open,
.CodeMirror-foldgutter-folded {
    cursor: pointer;
}

.CodeMirror-foldgutter-open::after,
.CodeMirror-foldgutter-folded::after {
    position: relative;
    top: -0.1em;
    display: inline-block;
    font-size: 0.8em;
    content: '>';
    opacity: 0.8;
    transform: rotate(90deg);
    transition: transform 0.2s;
}

.CodeMirror-foldgutter-folded::after {
    transform: none;
}

/* CURSOR */

.CodeMirror-cursor {
    position: absolute;
    width: 0;
    pointer-events: none;
    border-right: none;
    border-left: 1px solid black;
}

/* Shown when moving in bi-directional text */
.CodeMirror div.CodeMirror-secondarycursor {
    border-left: 1px solid silver;
}

.cm-fat-cursor .CodeMirror-cursor {
    width: auto;
    background: #7e7;
    border: 0 !important;
}

.cm-fat-cursor div.CodeMirror-cursors {
    z-index: 1;
}

.cm-fat-cursor-mark {
    background-color: rgb(20 255 20 / 50%);
    animation: blink 1.06s steps(1) infinite;
}

.cm-animate-fat-cursor {
    width: auto;
    background-color: #7e7;
    border: 0;
    animation: blink 1.06s steps(1) infinite;
}
@keyframes blink {
    50% {
        background-color: transparent;
    }
}
@keyframes blink {
    50% {
        background-color: transparent;
    }
}
@keyframes blink {
    50% {
        background-color: transparent;
    }
}

.cm-tab {
    display: inline-block;
    text-decoration: inherit;
}

.CodeMirror-rulers {
    position: absolute;
    inset: -50px 0 -20px;
    overflow: hidden;
}

.CodeMirror-ruler {
    position: absolute;
    top: 0;
    bottom: 0;
    border-left: 1px solid #ccc;
}

/* DEFAULT THEME */
.cm-s-default.CodeMirror {
    background-color: transparent;
}

.cm-s-default .cm-header {
    color: blue;
}

.cm-s-default .cm-quote {
    color: #090;
}

.cm-negative {
    color: #d44;
}

.cm-positive {
    color: #292;
}

.cm-header,
.cm-strong {
    font-weight: bold;
}

.cm-em {
    font-style: italic;
}

.cm-link {
    text-decoration: underline;
}

.cm-strikethrough {
    text-decoration: line-through;
}

.cm-s-default .cm-atom,
.cm-s-default .cm-def,
.cm-s-default .cm-property,
.cm-s-default .cm-variable-2,
.cm-s-default .cm-variable-3,
.cm-s-default .cm-punctuation {
    color: var(--base);
}

.cm-s-default .cm-hr,
.cm-s-default .cm-comment {
    color: var(--comment);
}

.cm-s-default .cm-attribute,
.cm-s-default .cm-keyword {
    color: var(--keyword);
}

.cm-s-default .cm-variable {
    color: var(--variable);
}

.cm-s-default .cm-bracket,
.cm-s-default .cm-tag {
    color: var(--tags);
}

.cm-s-default .cm-number {
    color: var(--number);
}

.cm-s-default .cm-string,
.cm-s-default .cm-string-2 {
    color: var(--string);
}

.cm-s-default .cm-type {
    color: #085;
}

.cm-s-default .cm-meta {
    color: #555;
}

.cm-s-default .cm-qualifier {
    color: var(--qualifier);
}

.cm-s-default .cm-builtin {
    color: #7539ff;
}

.cm-s-default .cm-link {
    color: var(--flash);
}

.cm-s-default .cm-error {
    color: #ff008c;
}

.cm-invalidchar {
    color: #ff008c;
}

.CodeMirror-composing {
    border-bottom: 2px solid;
}

/* Default styles for common addons */

div.CodeMirror span.CodeMirror-matchingbracket {
    color: #0b0;
}

div.CodeMirror span.CodeMirror-nonmatchingbracket {
    color: #a22;
}

.CodeMirror-matchingtag {
    background: rgb(255 150 0 / 30%);
}

.CodeMirror-activeline-background {
    background: #e8f2ff;
}

/* STOP */

/* The rest of this file contains styles related to the mechanics of
   the editor. You probably shouldn't touch them. */

.CodeMirror-scroll {
    position: relative;
    height: 100%;
    padding-bottom: 30px;
    margin-right: -30px;

    /* 30px is the magic margin used to hide the element's real scrollbars */

    /* See overflow: hidden in .CodeMirror */
    margin-bottom: -30px;
    overflow: scroll !important; /* Things will break if this is overridden */
    outline: none; /* Prevent dragging from highlighting the element */
}

.CodeMirror-sizer {
    position: relative;
    margin-bottom: 20px !important;
    border-right: 30px solid transparent;
}

/* The fake, visible scrollbars. Used to force redraw during scrolling
   before actual scrolling happens, thus preventing shaking and
   flickering artifacts. */
.CodeMirror-vscrollbar,
.CodeMirror-hscrollbar,
.CodeMirror-scrollbar-filler,
.CodeMirror-gutter-filler {
    position: absolute;
    z-index: 6;
    display: none;
}

.CodeMirror-vscrollbar {
    top: 0;
    right: 0;
    overflow-x: hidden;
    overflow-y: scroll;
}

.CodeMirror-hscrollbar {
    bottom: 0;
    left: 0;
    overflow-x: scroll;
    overflow-y: hidden;
}

.CodeMirror-scrollbar-filler {
    right: 0;
    bottom: 0;
}

.CodeMirror-gutter-filler {
    bottom: 0;
    left: 0;
}

.CodeMirror-gutter {
    display: inline-block;
    height: 100%;
    margin-bottom: -30px;
    white-space: normal;
    vertical-align: top;
}

.CodeMirror-gutter-wrapper {
    position: absolute;
    z-index: 4;
    background: none !important;
    border: none !important;
}

.CodeMirror-gutter-background {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 4;
}

.CodeMirror-gutter-elt {
    position: absolute;
    z-index: 4;
    cursor: default;
}

.CodeMirror-gutter-wrapper ::selection {
    background-color: transparent;
}

.CodeMirrorwrapper ::selection {
    background-color: transparent;
}

.CodeMirror pre {
    position: relative;
    z-index: 2;
    padding: 0 4px; /* Horizontal padding of content */
    margin: 0;
    overflow: visible;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    color: inherit;
    word-wrap: normal;
    white-space: pre;
    background: transparent;
    border-width: 0;

    /* Reset some styles that the rest of the page might have set */
    border-radius: 0;
    -webkit-tap-highlight-color: transparent;
    font-variant-ligatures: contextual;
}

.CodeMirror-wrap pre {
    word-break: normal;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.CodeMirror-linebackground {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.CodeMirror-linewidget {
    position: relative;
    z-index: 2;
    padding: 0.1px; /* Force widget margins to stay inside of the container */
}

.CodeMirror-rtl pre {
    direction: rtl;
}

.CodeMirror-code {
    outline: none;
}

/* Force content-box sizing for the elements where we expect it */
.CodeMirror-scroll,
.CodeMirror-sizer,
.CodeMirror-gutter,
.CodeMirror-gutters,
.CodeMirror-linenumber {
    box-sizing: content-box;
}

.CodeMirror-measure {
    position: absolute;
    width: 100%;
    height: 0;
    overflow: hidden;
    visibility: hidden;
}

.CodeMirror-measure pre {
    position: static;
}

div.CodeMirror-cursors {
    position: relative;
    z-index: 3;
    visibility: hidden;
}

div.CodeMirror-dragcursors {
    visibility: visible;
}

.CodeMirror-focused div.CodeMirror-cursors {
    visibility: visible;
}

.CodeMirror-selected {
    background: #d9d9d9;
}

.CodeMirror-focused .CodeMirror-selected {
    background: #d7d4f0;
}

.CodeMirror-crosshair {
    cursor: crosshair;
}

.CodeMirror-line::selection,
.CodeMirror-line > span::selection,
.CodeMirror-line > span > span::selection {
    background: #d7d4f0;
}

.cm-searching {
    background-color: #ffa;
    background-color: rgb(255 255 0 / 40%);
}

/* Used to force a border model for a node */
.cm-force-border {
    padding-right: 0.1px;
}

@media print {
    /* Hide the cursor when printing */
    .CodeMirror div.CodeMirror-cursors {
        visibility: hidden;
    }
}

/* See issue #2901 */
.cm-tab-wrap-hack::after {
    content: '';
}

/* Help users use markselection to safely style text background */
span.CodeMirror-selectedtext {
    background: none;
}

使用

传入JSON数据value,可以通过JSON.stringify(data, null, 2)转成带换行的JSON格式数据

HTML
<codeMirror :value="data" ref="codeMirrorRef"></codeMirror>
<codeMirror :value="data" ref="codeMirrorRef"></codeMirror>
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