What is the difference between button-hover and hover-class of Mini Program's button button?

look at the official document that hover-class can set the style that button presses, but button-hover only mentioned the default value, did not say what effect, Baidu the difference between the two can not be found, which seniors can guide?


relationship should be < button hover-class= "button-hover" > < / button >

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MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-7ade91-15abf.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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