如何将字符串附加或添加到对象中的现有属性？

Question

a={
propA="abcd@x.com",
propb="123",
propc="USA"}

b={
propA="xyz@x.com",
propb="566",
propc="Ind"}

If I have to append PropA of object b to propA of a, what should I do ?

expected output: it can be array or new object

a={
propA=["abcd@x.com","xyz@x.com"]
propb="123",
propc="USA"}

Answer 1

You could wrap it in square bracket []

 const a = { propA: "abcd@x.com", propb: "123", propc: "USA", } const b = { propA: "xyz@x.com", propb: "566", propc: "Ind", } a.propA = [a.propA, b.propA] console.log(a)

Answer 2

    let yourKey = 'propA'; // in your case you want to update propA
    a[yourKey] = [a[yourKey], b[yourKey]];
    console.log(a);