Has a tree structure, a method to achieve getKeys (data, str); Get the name of all the upper node in the data string str, for example:
getKeys (data, 'str1') returns 'key1'
getKeys (data, 'str3') returns 'key2 key3'
getKeys(data,'str6') 返回 ‘key2 key5 key6'
code show as below:
var data = { key1: 'str1', key2: { key3: 'str3', key4: 'str4', key5: { key6: 'str6' } } } function getKeys(data, val) { for (var key in data) { if (typeof data[key] === 'object') { var t = getKeys(data[key], val) return t ? key + ' ' + t : '' } else { if (data[key] === val) return key; } } } console.log(getKeys(data, 'str6'));