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Cannot adjust volume in HTML5 audio element

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When I move my mouse to hover over the volume icon in an audio element, the volume bar appears. However, the moment I move my mouse off the volume icon and to the volume bar, the volume bar disappears.

This can be observed on the following webpage: http://moztw.org/demo/audioplayer/

When I move my mouse to hover over the volume icon in an audio element, the volume bar appears. However, the moment I move my mouse off the volume icon and to the volume bar, the volume bar disappears. This can be observed on the following webpage: http://moztw.org/demo/audioplayer/

All Replies (2)

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Yes confirmed, I see sane behavior on Linux. It works if I click the bottom of that volume bar to mute the sound and then drag the bar to the wanted volume level.

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Unfortunately, this workaround does not seem to work for me. Volume bar still disappears immediately, even if I'm holding down the mouse button.