const obj = {
num1 : 'string',
}
const obj2 = {
num2 : 1234
}
let a = {
...obj,
}
a = {
...a,
...obj2,
}
a.num1 // ok
a.num2 // error
Object a contains first element num1 and dont show the second num2
in real code the obj and obj2 is complex and not same
From the definition of a, the type of a is limited to
const a: {
num1: string;
}
While assigning { ...a, ...obj2} to a can satisfy this restriction condition, but when the variable a is used, its type is still the type when it was originally defined, so It will throw an exception, maybe you can try
const obj = {
num1:'string',
}
const obj2 = {
num2: 1234
}
const a = {
...obj,
}
const c = {
...a,
...obj2,
}
c.num1 // ok
c.num2 // ok