Update article.md
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@ -219,9 +219,9 @@ num = 5; // the variable "num" is created if didn't exist
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alert(num); // 5
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```
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That's a bad practice, it gives an error in the strict mode:
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That's a bad practice, it would give an error in the strict mode:
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```js run refresh untrusted
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```js
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"use strict";
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*!*
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