• 展开数组
    • 展开对象
    1. let arr1 = [1, 2, 3];
    2. let arr2 = [4, 5, 6];
    3. let arr3 = [...arr1, ...arr2];
    4. let obj1 = { a: 1, b: 2 };
    5. let obj2 = { c: 3 }
    6. let obj3 = { ...obj1, ...obj2 };
    7. console.log(arr3,obj3)

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