1.不同的JSON格式的数据的字符串进行拼接,借助forin

let dataOne = "{\"name\":\"brant\"}"
let dataTwo = "{\"name\": \"Jane\",\"age\": \"22\"}"

let dataOneJSON = JSON.parse(dataOne )
let dataTwoNew = dataTwo.substr(0,dataTwo.length()-1)
for (const key in dataOneJSON ) 
{
	dataTwoNew += ",\""+key+"\":\""+dataOneJSON[key]+"\""
 }
dataTwoNew += "}"

console.log(dataTwoNew)

2.JSON数据删除包含的某个JSON相同的数据

let dataOne = "{\"name\":\"brant\"}"
let dataTwo = "{\"name\": \"brant\",\"age\": \"22\"}"

let dataOneJSON = JSON.parse(dataOne )
let dataTwoJSON = JSON.parse(dataTwo )
for (const keyTwo in dataTwoJSON ) 
{
	for (const keyOne in dataOneJSON ) 
		{
			if(keyTwo == keyOne && dataOneJSON[keyOne] == dataTwoJSON[keyTwo ] ){
				dataTwo delete dataTwo[keyTwo+""]
			}
 		}
 }
console.log(dataTwoJSON )