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hasDepartmentIdFn(treeData, key) {       this.hasDepartmentId = false       const loop = (data) => {         for (const item of data) {           if (item.treedataid === key) {             this.hasDepartmentId = true             break           }           if (item.childList && item.childList.length) {             loop(item.childList)           }         }       }       loop(treeData)     },   this.hasDepartmentIdFn(res.data, this.mainForm.lngdepartmentid) if (this.hasDepartmentId) { ... } 其他 export function getNodeByPropertyAndValue(treeData, key, value, compare) {   if (!treeData || !treeData.length) return null   if (!compare) compare = (a, b, item) => a === b   let node = null   const loop = (data) => {     for (const item of data) {       if (compare(item[key], value, item)) {         node = { ...item }         break       }       if (item.childList && item.childList.length) {         loop(item.childList)       }     }   }   loop(treeData)   return node }    methods: {       getNodeByPropertyAndValue,     getDictionaryName(datalist, value) {       const node = this.getNodeByPropertyAndValue(datalist, 'treedataid', value)       if (node) {         return node.treedatacodeandname       }       return ''     } }