根据对象路径获取对象的value

// 获取value的方法 obj为要获取的对象，path是路径 用.链接
var getPropByPath = function (obj, path) {
      let tempObj = obj
      path = path.replace(/\[(\w+)\]/g, '.$1')
      path = path.replace(/^\./, '')
      let keyArr = path.split('.')
      let i = 0
      for (let len = keyArr.length; i < len - 1; ++i) {
        let key = keyArr[i]
        if (key in tempObj) {
          tempObj = tempObj[key]
        } else {
          console.error('没有查到相关值!!!!')
        }
      }
      return {
        obj: tempObj,
        key: keyArr[i],
        val: tempObj[keyArr[i]]
      }
    }

//  调用示例 
var obj = {name:'objname', items:[{value: 0},{value: 1}]}, path = 'items.0.value'; console.log( getPropByPath(obj, path).v );