Here Object.assign() copy the value of first level's key-value pair, but if your key-value pair's value is object then it will assign by address. Here is example.
Object.assign()
let x = { "a":{c:10}, "b":100}; let z = {}; Object.assign(z,x); z.b = 1000; z.a.c = 50; console.log(x); // {a: {c: 50}, b: 100}
Remember this for better understanding.
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Here
Object.assign()copy the value of first level's key-value pair, but if your key-value pair's value is object then it will assign by address.Here is example.
Remember this for better understanding.