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| PASS setter on DOMStringMap must enqueue an attributeChanged reaction when adding an observed data attribute |
| PASS setter on DOMStringMap must not enqueue an attributeChanged reaction when adding an unobserved data attribute |
| PASS setter on DOMStringMap must enqueue an attributeChanged reaction when mutating the value of an observed data attribute |
| PASS setter on DOMStringMap must enqueue an attributeChanged reaction when mutating the value of an observed data attribute to the same value |
| PASS setter on DOMStringMap must not enqueue an attributeChanged reaction when mutating the value of an unobserved data attribute |
| PASS deleter on DOMStringMap must enqueue an attributeChanged reaction when removing an observed data attribute |
| PASS deleter on DOMStringMap must not enqueue an attributeChanged reaction when removing an unobserved data attribute |
| PASS deleter on DOMStringMap must not enqueue an attributeChanged reaction when it does not remove a data attribute |
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