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javascript - js / html5 audio: Why is canplaythrough not ...
https://stackoverflow.com/questions/49792768/js-html5-audio-why-is-canplaythrough-not-fired-on-ios-safari#:~:text=If%20Safari%27s%20not%20downloading%20the%20audio%20%28or%20only,%27auto%27%20before%20setting%20audio.src%20Share%20Improve%20this%20answer
javascript - Preloading HTML5 Audio in Mobile Safari ...
https://stackoverflow.com/questions/5758719/preloading-html5-audio-in-mobile-safari
var track; function addHTMLAudio() { track = document.createElement('audio'); track.id = 'mm_audio' track.autoplay = false; track.preload = false; track.addEventListener('canplaythrough',function(){ track.removeEventListener('canplaythrough'); audioLoaded = true; },false); document.getElementById('body').appendChild(track); track.src = …
Safari HTML5 audio preload disabled on iP… - Apple Community
https://discussions.apple.com/thread/6468636
The audio clips need to be pre-loaded at the start of the experiment so that they play virtually instantaneously when called from JavaScript / jQuery. Unfortunately, preloading of HTML5 audio is disabled in Safari mobile (iPad / iPhone) - see this article from Apple. The reasoning given is that this is done to avoid use of cellular network data which could be costly.
Audio and Video HTML - Apple Developer
https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/Using_HTML5_Audio_Video/AudioandVideoTagBasics/AudioandVideoTagBasics.html
preload. This attribute was formerly named autobuffer, and was boolean. none | metadata | auto. none—Safari should not preload media data. metadata—Safari should preload only media metadata. automatic—Safari should preload all media data. autoplay. Boolean—any value sets this to true. If present, asks the browser to play the media automatically.
Delivering Video Content for Safari - Apple Developer
https://developer.apple.com/documentation/webkit/delivering_video_content_for_safari
Safari honors the preload="metadata" attribute, allowing <video> and <audio> elements to load enough media data to determine that media’s size, duration, and available tracks. A <video> element can use the play() method to automatically play without user gestures only when it contains no audio tracks or has its muted property set to true. If this video element gains an …
Cross-browser audio basics - Developer guides | MDN
https://developer.mozilla.org/en-US/docs/Web/Guide/Audio_and_video_delivery/Cross-browser_audio_basics
preload. The preload attribute allows you to specify a preference for how the browser preloads the audio, in other words, which part of the file it downloads when the <audio> element is initialized, and before the play button is pressed. preload can take 3 different values: none: Don't download anything before the play button is pressed.
HTML audio preload Attribute - W3Schools
https://www.w3schools.com/TAGs/att_audio_preload.asp
The preload attribute specifies if and how the author thinks that the audio file should be loaded when the page loads. The preload attribute allows the author to provide a hint to the browser about what he/she thinks will lead to the best user experience. This attribute may be ignored in some instances. Note: The preload attribute is ignored if autoplay is present.
iOS-Specific Considerations - Apple Developer
https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/Using_HTML5_Audio_Video/Device-SpecificConsiderations/Device-SpecificConsiderations.html
Safari on iOS (including iPad) currently supports uncompressed WAV and AIF audio, MP3 audio, and AAC-LC or HE-AAC audio. HE-AAC is the preferred format. Safari on iOS (including iPad) currently supports MPEG-4 video (Baseline profile) and QuickTime movies encoded with H.264 video (Baseline profile) and one of the supported audio types.
HTML DOM Audio preload Property - W3Schools
https://www.w3schools.com/jsref/prop_audio_preload.asp
Definition and Usage. The preload property sets or returns the value of the preload attribute of a audio. The preload attribute specifies if and how the author thinks that the audio should be loaded when the page loads. The preload attribute allows the author to provide a hint to the browser about what he/she thinks will lead to the best user experience.
Preloading for Web View - Snapchat
https://businesshelp.snapchat.com/s/article/mobile-optimization-playbook?language=en_US
Preloading is disabled by default for all new Single Image or Video ads in Ads Manager. To enable preloading, toggle ‘Preload’ to 'Enabled' in the 'Build Your Ads' portion of the campaign creation flow. Reasons to enable preloading: Decreases mobile site load time, therefore improving time spent on your content.
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