{
"title":"Resource Hints: preload",
"description":"Using ``, browsers can be informed to prefetch resources without having to execute them, allowing fine-grained control over when and how resources are loaded.",
"spec":"https://w3c.github.io/preload/",
"status":"cr",
"links":[
{
"url":"https://www.smashingmagazine.com/2016/02/preload-what-is-it-good-for/",
"title":"Preload: What Is It Good For?"
},
{
"url":"https://developer.mozilla.org/en-US/docs/Web/HTML/Preloading_content",
"title":"MDN Web Docs - Preloading content with rel=\"preload\""
},
{
"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=Rel%3Dpreload",
"title":"Firefox meta support bug"
}
],
"bugs":[
],
"categories":[
"DOM"
],
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},
"notes":"Firefox has newly rewritten their implementation and plans to enable it by default in a version closely succeeding 78",
"notes_by_num":{
"1":"Only cachable resources can be preloaded. This includes the following `as` values: script, style, image, video, audio, track, fetch, and font (note font/collection is not supported).",
"2":"Can be enabled via the \"Experimental Features\" developer menu",
"3":"Disabled by default behind the `network.preload` flag.",
"4":"Partial support in Edge 17+ refers to support for only the HTML `` format, not the HTTP header format."
},
"usage_perc_y":87.08,
"usage_perc_a":0.58,
"ucprefix":false,
"parent":"",
"keywords":"",
"ie_id":"preload",
"chrome_id":"5757468554559488",
"firefox_id":"link-rel-preload",
"webkit_id":"specification-preload",
"shown":true
}