在对象中添加键值对(Object.assign()的用法)

//this.tableData={a:1,b:2,c:3}
let dx = { assumeUserName: "" };
dx.assumeUserName = "张三";
Object.assign(this.tableData[0], dx);
console.log(this.tableData);
//{a:1,b:2,c:3,assumeUserName: "张三"}