怎么在vue中利用monaco实现一个代码高亮效果？很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。
为什么要使用Vue
Vue是一款友好的、多用途且高性能的JavaScript框架，使用vue可以创建可维护性和可测试性更强的代码库，Vue允许可以将一个网页分割成可复用的组件，每个组件都包含属于自己的HTML、CSS、JavaScript，以用来渲染网页中相应的地方，所以越来越多的前端开发者使用vue。
首先需要下载monaco-editor组件，monaco-editor-webpack-plugin组件
npm install monaco-editor npm install monaco-editor-webpack-plugin
当然啦，npm下载很是缓慢，换个国内镜像，淘宝的吧。果然，速度就嗖嗖的起来。
npm install -g cnpm --registry=https://registry.npm.taobao.org cnpm install cnpm install monaco-editor cnpm install monaco-editor-webpack-plugin
可在node_modules下看到其目录结构
核心代码如下所示
首先写个组件，供其他页面引入调用，
CodeEditor.vue
<template>
<div class="code-container" ref="container"></div>
</template>
<script>
import * as monaco from "monaco-editor";
let sqlStr =
"ADD EXCEPT PERCENT ALL EXEC PLAN ALTER EXECUTE PRECISION AND EXISTS PRIMARY ANY EXIT PRINT AS FETCH PROC ASC FILE PROCEDURE AUTHORIZATION FILLFACTOR PUBLIC BACKUP FOR RAISERROR BEGIN FOREIGN READ BETWEEN FREETEXT READTEXT BREAK FREETEXTTABLE RECONFIGURE BROWSE FROM REFERENCES BULK FULL REPLICATION BY FUNCTION RESTORE CASCADE GOTO RESTRICT CASE GRANT RETURN CHECK GROUP REVOKE CHECKPOINT HAVING RIGHT CLOSE HOLDLOCK ROLLBACK CLUSTERED IDENTITY ROWCOUNT COALESCE IDENTITY_INSERT ROWGUIDCOL COLLATE IDENTITYCOL RULE COLUMN IF SAVE COMMIT IN SCHEMA COMPUTE INDEX SELECT CONSTRAINT INNER SESSION_USER CONTAINS INSERT SET CONTAINSTABLE INTERSECT SETUSER CONTINUE INTO SHUTDOWN CONVERT IS SOME CREATE JOIN STATISTICS CROSS KEY SYSTEM_USER CURRENT KILL TABLE CURRENT_DATE LEFT TEXTSIZE CURRENT_TIME LIKE THEN CURRENT_TIMESTAMP LINENO TO CURRENT_USER LOAD TOP CURSOR NATIONAL TRAN DATABASE NOCHECK TRANSACTION DBCC NONCLUSTERED TRIGGER DEALLOCATE NOT TRUNCATE DECLARE NULL TSEQUAL DEFAULT NULLIF UNION DELETE OF UNIQUE DENY OFF UPDATE DESC OFFSETS UPDATETEXT DISK ON USE DISTINCT OPEN USER DISTRIBUTED OPENDATASOURCE VALUES DOUBLE OPENQUERY VARYING DROP OPENROWSET VIEW DUMMY OPENXML WAITFOR DUMP OPTION WHEN ELSE OR WHERE END ORDER WHILE ERRLVL OUTER WITH ESCAPE OVER WRITETEXT";
export default {
name: "codeEditor",
props: {
options: {
type: Object,
default() {
return {
language: "java", // shell、sql、python
readOnly: true // 不能编辑
};
}
},
value: {
type: String,
default: ""
}
},
data() {
return {
monacoInstance: null,
provider: null,
hints: [
"SELECT",
"INSERT",
"DELETE",
"UPDATE",
"CREATE TABLE",
"DROP TABLE",
"ALTER TABLE",
"CREATE VIEW",
"DROP VIEW",
"CREATE INDEX",
"DROP INDEX",
"CREATE PROCEDURE",
"DROP PROCEDURE",
"CREATE TRIGGER",
"DROP TRIGGER",
"CREATE SCHEMA",
"DROP SCHEMA",
"CREATE DOMAIN",
"ALTER DOMAIN",
"DROP DOMAIN",
"GRANT",
"DENY",
"REVOKE",
"COMMIT",
"ROLLBACK",
"SET TRANSACTION",
"DECLARE",
"EXPLAN",
"OPEN",
"FETCH",
"CLOSE",
"PREPARE",
"EXECUTE",
"DESCRIBE",
"FORM",
"ORDER BY"
]
};
},
created() {
this.initHints();
},
mounted() {
this.init();
},
beforeDestroy() {
this.dispose();
},
methods: {
dispose() {
if (this.monacoInstance) {
if (this.monacoInstance.getModel()) {
this.monacoInstance.getModel().dispose();
}
this.monacoInstance.dispose();
this.monacoInstance = null;
if(this.provider){
this.provider.dispose();
this.provider = null
}
}
},
initHints() {
let sqlArr = sqlStr.split(" ");
this.hints = Array.from(new Set([...this.hints, ...sqlArr])).sort();
},
init() {
let that = this;
this.dispose();
let createCompleters = textUntilPosition => {
//过滤特殊字符
let _textUntilPosition = textUntilPosition
.replace(/[\*\[\]@\$\(\)]/g, "")
.replace(/(\s+|\.)/g, " ");
//切割成数组
let arr = _textUntilPosition.split(" ");
//取当前输入值
let activeStr = arr[arr.length - 1];
//获得输入值的长度
let len = activeStr.length;
//获得编辑区域内已经存在的内容
let rexp = new RegExp('([^\\w]|^)'+activeStr+'\\w*', "gim");
let match = that.value.match(rexp);
let _hints = !match ? [] : match.map(ele => {
let rexp = new RegExp(activeStr, "gim");
let search = ele.search(rexp);
return ele.substr(search)
})
//查找匹配当前输入值的元素
let hints = Array.from(new Set([...that.hints, ..._hints])).sort().filter(ele => {
let rexp = new RegExp(ele.substr(0, len), "gim");
return match && match.length === 1 && ele === activeStr || ele.length === 1
? false
: activeStr.match(rexp);
});
//添加内容提示
let res = hints.map(ele => {
return {
label: ele,
kind: that.hints.indexOf(ele) > -1 ? monaco.languages.CompletionItemKind.Keyword : monaco.languages.CompletionItemKind.Text,
documentation: ele,
insertText: ele
};
});
return res;
};
this.provider = monaco.languages.registerCompletionItemProvider("sql", {
provideCompletionItems(model, position) {
var textUntilPosition = model.getValueInRange({
startLineNumber: position.lineNumber,
startColumn: 1,
endLineNumber: position.lineNumber,
endColumn: position.column
});
var suggestions = createCompleters(textUntilPosition);
return {
suggestions: suggestions
};
return createCompleters(textUntilPosition);
}
});
// 初始化编辑器实例
this.monacoInstance = monaco.editor.create(this.$refs["container"], {
value: this.value,
theme: "vs-dark",
autoIndex: true,
...this.options
});
// 监听编辑器content变化事件
this.monacoInstance.onDidChangeModelContent(() => {
this.$emit("contentChange", this.monacoInstance.getValue());
});
}
}
};
</script>
<style lang="scss" scope>
.code-container {
width: 100%;
height: 100%;
overflow: hidden;
border: 1px solid #eaeaea;
.monaco-editor .scroll-decoration {
box-shadow: none;
}
}
</style>
引入页面，供本页面使用
index.vue
<template>
<div class="container">
<code-editor
:options="options"
:value="content"
@contentChange="contentChange"
></code-editor>
</div>
</template>
<script>
import CodeEditor from "@/components/CodeEditor";
export default {
name: "SQLEditor",
components: {
CodeEditor
},
data() {
return {
content: "",
options: {
language: "sql",
theme: 'vs',
readOnly: false
}
};
},
created() {},
methods: {
// 绑定编辑器value值的变化
contentChange(val) {
this.content = val;
}
}
};
</script>
<style scoped lang="scss">
.container {
text-align: left;
padding: 10px;
}
</style>
效果如下所示
代码自动提示效果，如下所示
代码高亮效果，代码段折叠效果，右侧预览效果如下所示
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