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+{
+ "title":"Resource Hints: preconnect",
+ "description":"Gives a hint to the browser to begin the connection handshake (DNS, TCP, TLS) in the background to improve performance. This is indicated using `<link rel=\"preconnect\" href=\"https://example-domain.com/\">`",
+ "spec":"https://www.w3.org/TR/resource-hints/#preconnect",
+ "status":"wd",
+ "links":[
+ {
+ "url":"https://www.igvita.com/2015/08/17/eliminating-roundtrips-with-preconnect/",
+ "title":"Eliminating Roundtrips with Preconnect"
+ }
+ ],
+ "bugs":[
+
+ ],
+ "categories":[
+ "DOM"
+ ],
+ "stats":{
+ "ie":{
+ "5.5":"n",
+ "6":"n",
+ "7":"n",
+ "8":"n",
+ "9":"n",
+ "10":"n",
+ "11":"n"
+ },
+ "edge":{
+ "12":"n",
+ "13":"n",
+ "14":"n",
+ "15":"a #2",
+ "16":"a #2",
+ "17":"a #2",
+ "18":"a #2"
+ },
+ "firefox":{
+ "2":"n",
+ "3":"n",
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+ "3.6":"n",
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+ "65":"y"
+ },
+ "chrome":{
+ "4":"n",
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+ },
+ "safari":{
+ "3.1":"n",
+ "3.2":"n",
+ "4":"n",
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+ },
+ "ios_saf":{
+ "3.2":"n",
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+ "11.0-11.2":"n",
+ "11.3-11.4":"y",
+ "12":"y"
+ },
+ "op_mini":{
+ "all":"n"
+ },
+ "android":{
+ "2.1":"n",
+ "2.2":"n",
+ "2.3":"n",
+ "3":"n",
+ "4":"n",
+ "4.1":"n",
+ "4.2-4.3":"n",
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+ "67":"y"
+ },
+ "bb":{
+ "7":"n",
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+ },
+ "op_mob":{
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+ "46":"y"
+ },
+ "and_chr":{
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+ },
+ "and_ff":{
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+ },
+ "ie_mob":{
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+ },
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+ },
+ "samsung":{
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+ },
+ "and_qq":{
+ "1.2":"y"
+ },
+ "baidu":{
+ "7.12":"y"
+ }
+ },
+ "notes":"",
+ "notes_by_num":{
+ "1":"Firefox 39 did not support 'crossorigin' attribute and preconnects were not processed by the preload parser. Both of these features were enabled in Firefox 41.",
+ "2":"Partial support in Edge 15+ refers to support for only the HTTP header format, not the `<link rel>` format."
+ },
+ "usage_perc_y":78.73,
+ "usage_perc_a":1.89,
+ "ucprefix":false,
+ "parent":"",
+ "keywords":"preconnect, resource hints",
+ "ie_id":"preconnectresourcehints",
+ "chrome_id":"5560623895150592",
+ "firefox_id":"",
+ "webkit_id":"",
+ "shown":true
+}
generated by cgit v1.2.3 (git 2.25.1) at 2026-07-23 12:19:54 +0000