TJ-JSTOOLS【数组操作 —— findTreeData】
功能： 根据字段匹配条件查找指定的树形节点数据。
1-函数引入
js
import { findTreeData } from 'tj-jstools'
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2-函数声明
ts
declare const findTreeData: (targetArr: any[], conditions: object, cb?: Function, childName?: string) => {} | undefined;
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3-使用示例
模拟数据
模拟数据详情
ts
const testArr = [
{
"id": "1",
"pid": "0",
"label": "省/直辖市",
"value": "重庆",
"children": [
{
"id": "4",
"pid": "1",
"label": "市/区",
"value": "九龙坡",
"children": [
{
"id": "6",
"pid": "4",
"label": "镇/街道",
"value": "九龙镇"
}
]
},
{
"id": "5",
"pid": "1",
"label": "市/区",
"value": "大渡口"
}
]
},
{
"id": "2",
"pid": "0",
"label": "省/直辖市",
"value": "四川",
"children": [
{
"id": "3",
"pid": "2",
"label": "市/区",
"value": "成都"
}
]
}
]
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3.1- 简单使用
ts
const res:object | undefined = findTreeData(testArr,{value:'九龙坡'})
// {"id":"4","pid":"1","label":"市/区","value":"九龙坡"}
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筛选条件的参数是一个JSON格式的对象，但是你配置的条件字段必须是源数据里面存在的。 如果不传条件参数，则返回undefined,如以下代码：
ts
const res:object | undefined = findTreeData(testArr)
// undefined
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3.2- 可以通过回调函数查询结果与返回结果一致
ts
findTreeData(testArr,{value:'九龙坡'},(val)=>{
console.log(val) // {"id":"4","pid":"1","label":"市/区","value":"九龙坡"}
})
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3.3- 配置childName
ts
const childName:string = 'children'
const res:object | undefined = findTreeData(testArr,{value:'九龙坡'},undefined,childName)
// {"id":"4","pid":"1","label":"市/区","value":"九龙坡"}
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- childName 默认值：
children, 一般指树形结构的子数据字段名称，你可以自定义为其他名称，如：childList等
3.4- 如果条件字段有多个符合节点，只返回第一个节点
ts
const res:object | undefined = findTreeData(testArr,{pid:'1'})
// {"id":"4","pid":"1","label":"市/区","value":"九龙坡"}
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以上代码的条件应该符合两个节点
json
{"id":"4","pid":"1","label":"市/区","value":"九龙坡"}
{"id":"5","pid":"1","label":"市/区","value":"大渡口"}
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但是只会返回其中一个！