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有如下需求:
- 取出数据中所有的id
数据:
testObj = {
id: 1,
name: '一',
children: [
{
id: 'zhinan',
label: '指南',
children: [{
id: 'shejiyuanze',
label: '设计原则',
children: [{
id: 'yizhi',
label: '一致'
}, {
id: 'fankui',
label: '反馈'
}, {
id: 'xiaolv',
label: '效率'
}, {
id: 'kekong',
label: '可控'
}]
}, {
id: 'daohang',
label: '导航',
children: [{
id: 'cexiangdaohang',
label: '侧向导航'
}, {
id: 'dingbudaohang',
label: '顶部导航'
}]
}]
}, {
id: 'zujian',
label: '组件',
children: [{
id: 'basic',
label: 'Basic',
children: [{
id: 'layout',
label: 'Layout 布局'
}, {
id: 'color',
label: 'Color 色彩'
}]
}, {
id: 'form',
label: 'Form',
children: [{
id: 'radio',
label: 'Radio 单选框'
}, {
id: 'checkbox',
label: 'Checkbox 多选框'
}]
}, {
id: 'data',
label: 'Data',
children: [{
id: 'table',
label: 'Table 表格'
}, {
id: 'tag',
label: 'Tag 标签'
}]
}, {
id: 'notice',
label: 'Notice',
children: [{
id: 'alert',
label: 'Alert 警告'
}, {
id: 'loading',
label: 'Loading 加载'
}]
}, {
id: 'navigation',
label: 'Navigation',
children: [{
id: 'menu',
label: 'NavMenu 导航菜单'
}]
}, {
id: 'others',
label: 'Others',
children: [{
id: 'dialog',
label: 'Dialog 对话框'
}, {
id: 'tooltip',
label: 'Tooltip 文字提示'
}]
}]
}, {
id: 'ziyuan',
label: '资源',
children: [{
id: 'jiaohu',
label: '组件交互文档'
}]
}
]
}
答案:
新建一个 topic3.html, 将下列代码复制到其中:
<html>
<head>
<title>js数据处理实战(三)</title>
</head>
<body>
<script src="http://code.jquery.com/jquery-2.1.4.min.js"></script>
<script>
// 已有数据
let testObj = {
id: 1,
name: '一',
children: [
{
id: 'zhinan',
label: '指南',
children: [{
id: 'shejiyuanze',
label: '设计原则',
children: [{
id: 'yizhi',
label: '一致'
}, {
id: 'fankui',
label: '反馈'
}, {
id: 'xiaolv',
label: '效率'
}, {
id: 'kekong',
label: '可控'
}]
}, {
id: 'daohang',
label: '导航',
children: [{
id: 'cexiangdaohang',
label: '侧向导航'
}, {
id: 'dingbudaohang',
label: '顶部导航'
}]
}]
}, {
id: 'zujian',
label: '组件',
children: [{
id: 'basic',
label: 'Basic',
children: [{
id: 'layout',
label: 'Layout 布局'
}, {
id: 'color',
label: 'Color 色彩'
}]
}, {
id: 'form',
label: 'Form',
children: [{
id: 'radio',
label: 'Radio 单选框'
}, {
id: 'checkbox',
label: 'Checkbox 多选框'
}]
}, {
id: 'data',
label: 'Data',
children: [{
id: 'table',
label: 'Table 表格'
}, {
id: 'tag',
label: 'Tag 标签'
}]
}, {
id: 'notice',
label: 'Notice',
children: [{
id: 'alert',
label: 'Alert 警告'
}, {
id: 'loading',
label: 'Loading 加载'
}]
}, {
id: 'navigation',
label: 'Navigation',
children: [{
id: 'menu',
label: 'NavMenu 导航菜单'
}]
}, {
id: 'others',
label: 'Others',
children: [{
id: 'dialog',
label: 'Dialog 对话框'
}, {
id: 'tooltip',
label: 'Tooltip 文字提示'
}]
}]
}, {
id: 'ziyuan',
label: '资源',
children: [{
id: 'jiaohu',
label: '组件交互文档'
}]
}
]
}
disposeData()
function disposeData () {
let ids = []
ids.push(testObj.id)
if (testObj.children && testObj.children.length) {
getIds(testObj.children, ids)
}
console.log(ids) // 共30个id
}
function getIds (child, ids) {
child.forEach(item => {
ids.push(item.id)
if (item.children && item.children.length) {
getIds(item.children, ids)
}
})
}
</script>
</body>
</html>