If this is false, the allowedToPlay property is missing from the HTMLMediaElement interface, and is thus not present on either or elements. This is currently false by default (except in nightly builds, where it's true by default). If you want to start playing the video after the first interaction with the page, setInterval() might be used to achieve this:Ī Boolean preference which specifies whether the HTMLMediaElement.allowedToPlay property is exposed to the web. If that's the case, we should present a user interface to let the user manually start playback that's handled here by a function showPlayButton().Īny other errors are handled as appropriate. This indicates that playback failed due to a permission issue, such as autoplay being denied. This looks at the error's name to see if it's NotAllowedError. We then add a catch() handler to the promise. If the promise returned by play() is resolved without error, the then() clause is run and can begin whatever needs to be done when autoplay has begun. Checking for undefined prevents this code from failing with an error on older versions of web browsers. Returning a promise to allow you to determine success or failure of the operation was added more recently. We check for this because in earlier versions of the HTML specification, play() didn't return a value. The first thing we do with the result of play() is make sure it's not undefined. getAutoplayPolicy (video ) = "allowed" ) ![]() If autoplay is only allowed for inaudible content, we mute the audio if autoplay is disallowed, we make sure that a placeholder image is displayed for the video. The code assumes video is an HTMLVideoElement media element using the tag or HTMLVideoElement, and that it is configured to autoplay with audio by default. The example below shows how you pass the mediaelement string to get the autoplay policy for all media elements in the document (pass audiocontext to get the policy for audio contexts). all media elements, or all audio contexts) in a document, or to check whether a specific media element or audio context can autoplay. ![]() The Navigator.getAutoplayPolicy() method can be used to check the autoplay policy for a type of media feature (i.e. ![]() Similarly, if you know that autoplay is not allowed at all, you might provide a default image for the video (using the poster attribute), or choose to defer loading the video until it is requested. If autoplay is important for your application, you may need to customize behavior based on whether or not autoplay is allowed, disallowed, or only supported for inaudible content.įor example, if your application needs to autoplay a video and you know that the page only allows the autoplay of inaudible content, you can either mute it or supply a video with no audio track. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.Example 2: Detecting whether autoplay is allowed THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions. mp3 produce different results in different browsers. wav files for short loops, because compressed formats like. ![]() If you call ay() on a loop that's already playing, it will reset to the beginning of the loop. You can trigger those however you want, as many times as you want. Function ready ( err, loop ) Įrr will be null as long as the audio was successfully loaded.
0 Comments
Leave a Reply. |