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Define SpeechSynthesisUtterance attribute setters #29

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foolip opened this issue Aug 6, 2018 · 1 comment

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foolip commented Aug 6, 2018

https://w3c.github.io/speech-api/#utterance-attributes

None of these attributes define what should happen when set, and except for voice it's not clear what the setter might do with invalid values:

text: How is a complete SSML document expected to be parsed when set once at .text property of SpeechSynthesisUtterance instance? #10
lang: what happens if a non-BCP 47 string is set?
volume: setting something outside the range [0, 1]?
rate: values <=0? Is there a maximum value?
pitch: similarly, what happens when setting outside the allowed range?

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foolip commented Aug 6, 2018

I found that there are issues related to this already filed by @guest271314: web-platform-tests/wpt#8712 and web-platform-tests/wpt#8795.

TimothyGu mentioned this issue

Defining what should happen if an utterance is changed after passing it to speak() #76

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