QW-ACT-R15 Lyd eller video har ikkje lyd som blir spelt av automatisk

Testar på krav:

• 1.4.2 Styring av lyd

Innhaldstype:

Krav til samsvar:

Applicability

This rule applies to any audio or video element for which all the following are true:

• autoplay: the element has an autoplay attribute value of true; and
• not muted: the element has a muted attribute value of false; and
• not paused: the element has a paused attribute value of false; and
• duration: the element has a media resource lasting more than 3 seconds and that contains audio.

Expectation

For each test target, the outcome of at least one of the following rules is passed:

• Audio Or Video That Plays Automatically Has A Control Mechanism
• Audio Or Video That Plays Automatically Has No Audio That Lasts More Than 3 Seconds

Assumptions

• This rule assumes that it is not possible to satisfy Success Criterion 1.4.2 Audio Control if the total length of the automatically playing audio is more than 3 seconds, even if there are pauses in the sound and no more than 3 seconds in a row with actual sound.
• This rule assumes that the mechanism to control the sound must be located in the same web page. Mechanisms located on other pages can still create accessibility issues for users relying on sound to navigate (e.g. screen readers users) since the autoplaying sound will interfere with their ability to find and activate the mechanism. If a mechanism external to the web page is provided, it is possible to fail this rule but still satisfy Success Criterion 1.4.2 Audio Control.
• This rule assumes that the mechanism to control the sound must be visible and accessible in order to be effective and usable by all kinds of users. If the mechanism is hidden to some users, it is possible to fail this rule but still satisfy Success Criterion 1.4.2 Audio Control.