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View Code? Open in Web Editor NEW一个JS小树库,处理树结构的一些函数。
一个JS小树库,处理树结构的一些函数。
。。
filter (tree, func, config = {}) {
config = getConfig(config)
const { children } = config
function listFilter (list) {
return list.map(node => ({ ...node })).filter(node => {
node[children] = node[children] && listFilter(node[children])
return func(node) || (node[children] && node[children].length)
})
}
return listFilter(tree)
},
这里return func(node) || (node[children] && node[children].length)
写法有些问题。
应该改为return func(node) || (func(node)&&node[children] && node[children].length)
一旦你所匹配的关键的在某个节点的children字段不存在,就会把当前的节点(node)的children给清空掉,这是不符合我的场景的,
例如:
dataOptions: [
{ id: '1', pId: '0', label: '光啊', children: [{ id: '1-1', pId: '1', label: '1-1级别' }, { id: '1-2', pId: '1', label: '1-2级别' }] },
{ id: '2', pId: '0', label: '你好', children: [{ id: '2-1', pId: '2', label: '2-1级别a' }, { id: '2-2', pId: '2', label: '2-2级别', children: [{ id: '2-2-1', pId: '2-2', label: '烦' }, { id: '2-2-2', pId: '2-2', label: '2-2-2级别' }] }] }
]
console.log(tree.filter({ func: data => data.label.indexOf('你') > -1 })) // { id: '2', pId: '0', label: '你好',children:[]}
改良方案如下:
Likefilter ({ tree = this.treeData, func, config = DEFAULT_CONFIG }) {
config = getConfig(config)
const { children } = config
function listFilter (tree) {
const result = []
tree.forEach(element => {
if (func(element)) {
result.push(element)
} else {
if (element[children] && element[children].length > 0) {
const childrenData = listFilter(element[children])
const obj = {
...element,
children: childrenData
}
if (childrenData && childrenData.length > 0) {
result.push(obj)
}
}
}
})
return result
}
return listFilter(tree)
}
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