Vue.js - 自定义一个JsonView组件(树形格式化显示JSON数据)
有时我们需要在页面上展示 json 数据,如果直接显示出来效果不太好。下面演示如何在 Vue.js 项目中创建一个专门的 Json 数据格式化组件,并使用它进行展示。
1,效果图
(1)JsonView 组件会自动对 JSON 数据进行格式化显示,同时具有语法高亮效果。
(2)同时点击节点头部的三角箭头,还可以对该节点进行展开、折叠操作。
2,组件代码(JsonView.vue)
<template> <div class="bgView"> <div :class="['json-view', length ? 'closeable' : '']" :style="'font-size:' + fontSize+'px'"> <span @click="toggleClose" :class="['angle', innerclosed ? 'closed' : '']" v-if="length"> </span> <div class="content-wrap"> <p class="first-line"> <span v-if="jsonKey" class="json-key">"{{jsonKey}}": </span> <span v-if="length"> {{prefix}} {{innerclosed ? ('...' + subfix) : ''}} <span class="json-note"> {{innerclosed ? (' // count: ' + length) : ''}} </span> </span> <span v-if="!length">{{isArray ? '[]' : '{}'}}</span> </p> <div v-if="!innerclosed && length" class="json-body"> <template v-for="(item, index) in items"> <json-view :closed="closed" v-if="item.isJSON" :key="index" :json="item.value" :jsonKey="item.key" :isLast="index === items.length - 1"></json-view> <p class="json-item" v-else :key="index"> <span class="json-key"> {{(isArray ? '' : '"' + item.key + '"')}} </span> : <span class="json-value"> {{item.value + (index === items.length - 1 ? '' : ',')}} </span> </p> </template> <span v-show="!innerclosed" class="body-line"></span> </div> <p v-if="!innerclosed && length" class="last-line"> <span>{{subfix}}</span> </p> </div> </div> </div> </template> <script> export default { name: 'jsonView', props: { json: [Object, Array], jsonKey: { type: String, default: '' }, closed: { type: Boolean, default: false }, isLast: { type: Boolean, default: true }, fontSize: { type: Number, default: 13 } }, created() { this.innerclosed = this.closed this.$watch('closed', () => { this.innerclosed = this.closed }) }, data() { return { innerclosed: true } }, methods: { isObjectOrArray(source) { const type = Object.prototype.toString.call(source) const res = type === '[object Array]' || type === '[object Object]' return res }, toggleClose() { if (this.innerclosed) { this.innerclosed = false } else { this.innerclosed = true } } }, computed: { isArray() { return Object.prototype.toString.call(this.json) === '[object Array]' }, length() { return this.isArray ? this.json.length : Object.keys(this.json).length }, subfix() { return (this.isArray ? ']' : '}') + (this.isLast ? '' : ',') }, prefix() { return this.isArray ? '[' : '{' }, items() { if (this.isArray) { return this.json.map(item => { const isJSON = this.isObjectOrArray(item) return { value: isJSON ? item : JSON.stringify(item), isJSON, key: '' } }) } const json = this.json return Object.keys(json).map(key => { const item = json[key] const isJSON = this.isObjectOrArray(item) return { value: isJSON ? item : JSON.stringify(item), isJSON, key } }) } } } </script> <style> .bgView { background-color: #fafafa; } .json-view { position: relative; display: block; width: 100%; height: 100%; white-space: nowrap; padding-left: 20px; box-sizing: border-box; } .json-note { color: #909399; } .json-key { color: rgb(147, 98, 15); } .json-value { color: rgb(24, 186, 24); } .json-item { margin: 0; padding-left: 20px; } .first-line { padding: 0; margin: 0; } .json-body { position: relative; padding: 0; margin: 0; } .json-body .body-line { position: absolute; height: 100%; width: 0; border-left: dashed 1px #bbb; top: 0; left: 2px; } .last-line { padding: 0; margin: 0; } .angle { position: absolute; display: block; cursor: pointer; float: left; width: 20px; text-align: center; left: 0; } .angle::after { content: ""; display: inline-block; width: 0; height: 0; vertical-align: middle; border-top: solid 4px #333; border-left: solid 6px transparent; border-right: solid 6px transparent; } .angle.closed::after { border-left: solid 4px #333; border-top: solid 6px transparent; border-bottom: solid 6px transparent; } </style>
3,使用样例
<template> <div> <JsonView :json="JsonData"></JsonView> </div> </template> <script> import JsonView from '@/components/JsonView' export default { name: 'test', components: { JsonView }, data() { return { JsonData: { error: 0, status: "success", date: "2019-09-18", results: [{ currentCity: "嘉兴", weather_data: [{ date: "今天(周三)", weather: "多云", wind: "微风", temperature: "23℃" }, { date: "明天(周四)", weather: "雷阵雨转中雨", wind: "微风", temperature: "29~22℃" } ] }, { currentCity: "合肥市", weather_data: [{ date: "今天(周三)", weather: "多云", wind: "东风3-4级", temperature: "27℃" }, { date: "明天(周四)", weather: "多云", wind: "东北风3-4级", temperature: "35~27℃" } ] } ] } } } } </script>