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| function foo() { | |
| return this; | |
| } | |
| // Non-Strict Mode | |
| foo.call(1) === 1; // false. | |
| // Bởi foo.call(1) sẽ trả ra giá trị là một object, tương đương với `new Number(1)` | |
| // Strict Mode | |
| foo.call(1) === 1; // true |
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