需求:實現json線上編輯並支援校驗,基於此使用了 CodeMirror線上編輯,jsonlint校驗輸入資料
// package.json:
"dependencies": {
"codemirror": "^5.53.2",
"core-js": "^3.8.3",
"jsonlint": "^1.6.3",
"vue": "^2.6.14"
},
基礎程式碼:
<template>
<div class="json-editor">
<textarea ref="textarea" />
</div>
</template>
<script>
import CodeMirror from "codemirror";
import "codemirror/addon/lint/lint.css";
import "codemirror/lib/codemirror.css";
import "codemirror/theme/rubyblue.css";
import "codemirror/mode/javascript/javascript";
import "codemirror/addon/lint/lint";
import "codemirror/addon/lint/json-lint";
require('script-loader!jsonlint')
export default {
name: "JsonEditor",
props: ["value"],
data() {
return {
jsonEditor: false,
};
},
watch: {
value(value) {
const editorValue = this.jsonEditor.getValue();
if (value !== editorValue) {
this.jsonEditor.setValue(JSON.stringify(this.value, null, 2));
}
},
},
mounted() {
// CodeMirror.fromTextArea()中第一個引數是DOM元素,而且必須是textarea元素;第二個引數是可選配置項
this.jsonEditor = CodeMirror.fromTextArea(this.$refs.textarea, {
lineNumbers: true,
mode: "application/json",
gutters: ["CodeMirror-lint-markers"],
theme: "rubyblue",
lint: true,
lineWrapping: true, // 自動換行
scrollPastEnd: true, // 允許使用者將一個編輯器高度的空白區域滾動到編輯器底部的檢視
lineNumbers: true, // 顯示左邊行號(預設false,即不顯示)
styleActiveLine: true, // 當前行背景高亮
});
this.jsonEditor.setValue(JSON.stringify(this.value, null, 2));
this.jsonEditor.on("change", (cm) => {
console.log("cm.getValue() :>> ", cm.getValue());
this.$emit("changed", cm.getValue());
this.$emit("input", cm.getValue());
});
},
methods: {
getValue() {
return this.jsonEditor.getValue();
},
},
};
</script>
<style scoped>
.json-editor {
height: 100%;
position: relative;
}
.json-editor >>> .CodeMirror {
height: auto;
min-height: 300px;
}
.json-editor >>> .CodeMirror-scroll {
min-height: 300px;
}
.json-editor >>> .cm-s-rubyblue span.cm-string {
color: #f08047;
}
.addbtn {
margin-bottom: 15px;
margin-left: 30px;
}
</style>
這樣,他就成功的報錯了!
報錯原因是因為這一行:require('script-loader!jsonlint')
專案找不到script-loader
,因而下了一個:
npm install script-loader
下載完畢,專案就有了雛形:
但是估計錯誤輸入後發現,並沒有實現錯誤校驗功能,很納悶,明明寫了lint:true
然後嘗試開啟控制檯看了下:
json-lint.js:22 Error: window.jsonlint not defined, CodeMirror JSON linting cannot run.
不懂為什麼,於是嘗試使用import
替換require
依舊如此
後來去github翻了下issue
, 發現此條可用:
https://github.com/scniro/react-codemirror2/issues/21
須下載jsonlint-mod
:
npm install jsonlint-mod
於是便實現了:
完整程式碼(無坑版):
<template>
<div class="json-editor">
<textarea ref="textarea" />
</div>
</template>
<script>
import CodeMirror from "codemirror";
import "codemirror/addon/lint/lint.css";
import "codemirror/lib/codemirror.css";
import "codemirror/theme/rubyblue.css";
import "codemirror/mode/javascript/javascript";
import "codemirror/addon/lint/lint";
import "codemirror/addon/lint/json-lint";
const jsonlint = require("jsonlint-mod");
console.log('jsonlint :>> ', jsonlint);
window.jsonlint = jsonlint;
export default {
name: "JsonEditor",
props: ["value"],
data() {
return {
jsonEditor: false,
};
},
watch: {
value(value) {
const editorValue = this.jsonEditor.getValue();
if (value !== editorValue) {
this.jsonEditor.setValue(JSON.stringify(this.value, null, 2));
}
},
},
mounted() {
// CodeMirror.fromTextArea()中第一個引數是DOM元素,而且必須是textarea元素;第二個引數是可選配置項
this.jsonEditor = CodeMirror.fromTextArea(this.$refs.textarea, {
lineNumbers: true,
mode: "application/json",
gutters: ["CodeMirror-lint-markers"],
theme: "rubyblue",
lint: true,
lineWrapping: true, // 自動換行
scrollPastEnd: true, // 允許使用者將一個編輯器高度的空白區域滾動到編輯器底部的檢視
lineNumbers: true, // 顯示左邊行號(預設false,即不顯示)
styleActiveLine: true, // 當前行背景高亮
});
this.jsonEditor.setValue(JSON.stringify(this.value, null, 2));
this.jsonEditor.on("change", (cm) => {
console.log("cm.getValue() :>> ", cm.getValue());
this.$emit("changed", cm.getValue());
this.$emit("input", cm.getValue());
});
},
methods: {
getValue() {
return this.jsonEditor.getValue();
},
},
};
</script>
<style scoped>
.json-editor {
height: 100%;
position: relative;
}
.json-editor >>> .CodeMirror {
height: auto;
min-height: 300px;
}
.json-editor >>> .CodeMirror-scroll {
min-height: 300px;
}
.json-editor >>> .cm-s-rubyblue span.cm-string {
color: #f08047;
}
.addbtn {
margin-bottom: 15px;
margin-left: 30px;
}
</style>
以上。