lepu-test-platform-web/node_modules/caniuse-db/features-json/link-rel-dns-prefetch.json

{
  "title":"Resource Hints: dns-prefetch",
  "description":"Gives a hint to the browser to perform a DNS lookup in the background to improve performance. This is indicated using `<link rel=\"dns-prefetch\" href=\"https://example.com/\">`",
  "spec":"https://www.w3.org/TR/resource-hints/#dns-prefetch",
  "status":"wd",
  "links":[
    {
      "url":"https://msdn.microsoft.com/en-us/library/dn265039(v=vs.85).aspx",
      "title":"Prerender and prefetch support"
    },
    {
      "url":"https://developer.mozilla.org/en-US/docs/Web/HTTP/Controlling_DNS_prefetching",
      "title":"Controlling DNS prefetching"
    },
    {
      "url":"https://www.ctrl.blog/entry/dns-prefetch-preconnect.html",
      "title":"What to <link rel=dns-prefetch> and when to use `preconnect` instead"
    }
  ],
  "bugs":[
    {
      "description":"Firefox only performs `dns-prefetch` on HTTP origins. The feature [is disabled on HTTPS](https://bugzilla.mozilla.org/show_bug.cgi?id=1596935)."
    }
  ],
  "categories":[
    "DOM"
  ],
  "stats":{
    "ie":{
      "5.5":"n",
      "6":"n",
      "7":"n",
      "8":"n",
      "9":"a #1",
      "10":"y",
      "11":"y"
    },
    "edge":{
      "12":"y",
      "13":"y",
      "14":"y",
      "15":"y",
      "16":"y",
      "17":"y",
      "18":"y",
      "79":"y",
      "80":"y",
      "81":"y",
      "83":"y",
      "84":"y"
    },
    "firefox":{
      "2":"n",
      "3":"n",
      "3.5":"a #2",
      "3.6":"a #2",
      "4":"a #2",
      "5":"a #2",
      "6":"a #2",
      "7":"a #2",
      "8":"a #2",
      "9":"a #2",
      "10":"a #2",
      "11":"a #2",
      "12":"a #2",
      "13":"a #2",
      "14":"a #2",
      "15":"a #2",
      "16":"a #2",
      "17":"a #2",
      "18":"a #2",
      "19":"a #2",
      "20":"a #2",
      "21":"a #2",
      "22":"a #2",
      "23":"a #2",
      "24":"a #2",
      "25":"a #2",
      "26":"a #2",
      "27":"a #2",
      "28":"a #2",
      "29":"a #2",
      "30":"a #2",
      "31":"a #2",
      "32":"a #2",
      "33":"a #2",
      "34":"a #2",
      "35":"a #2",
      "36":"a #2",
      "37":"a #2",
      "38":"a #2",
      "39":"a #2",
      "40":"a #2",
      "41":"a #2",
      "42":"a #2",
      "43":"a #2",
      "44":"a #2",
      "45":"a #2",
      "46":"a #2",
      "47":"a #2",
      "48":"a #2",
      "49":"a #2",
      "50":"a #2",
      "51":"a #2",
      "52":"a #2",
      "53":"a #2",
      "54":"a #2",
      "55":"a #2",
      "56":"a #2",
      "57":"a #2",
      "58":"a #2",
      "59":"a #2",
      "60":"a #2",
      "61":"a #2",
      "62":"a #2",
      "63":"a #2",
      "64":"a #2",
      "65":"a #2",
      "66":"a #2",
      "67":"a #2",
      "68":"a #2",
      "69":"a #2",
      "70":"a #2",
      "71":"a #2",
      "72":"a #2",
      "73":"a #2",
      "74":"a #2",
      "75":"a #2",
      "76":"a #2",
      "77":"a #2",
      "78":"a #2",
      "79":"a #2",
      "80":"a #2",
      "81":"a #2",
      "82":"a #2"
    },
    "chrome":{
      "4":"y",
      "5":"y",
      "6":"y",
      "7":"y",
      "8":"y",
      "9":"y",
      "10":"y",
      "11":"y",
      "12":"y",
      "13":"y",
      "14":"y",
      "15":"y",
      "16":"y",
      "17":"y",
      "18":"y",
      "19":"y",
      "20":"y",
      "21":"y",
      "22":"y",
      "23":"y",
      "24":"y",
      "25":"y",
      "26":"y",
      "27":"y",
      "28":"y",
      "29":"y",
      "30":"y",
      "31":"y",
      "32":"y",
      "33":"y",
      "34":"y",
      "35":"y",
      "36":"y",
      "37":"y",
      "38":"y",
      "39":"y",
      "40":"y",
      "41":"y",
      "42":"y",
      "43":"y",
      "44":"y",
      "45":"y",
      "46":"y",
      "47":"y",
      "48":"y",
      "49":"y",
      "50":"y",
      "51":"y",
      "52":"y",
      "53":"y",
      "54":"y",
      "55":"y",
      "56":"y",
      "57":"y",
      "58":"y",
      "59":"y",
      "60":"y",
      "61":"y",
      "62":"y",
      "63":"y",
      "64":"y",
      "65":"y",
      "66":"y",
      "67":"y",
      "68":"y",
      "69":"y",
      "70":"y",
      "71":"y",
      "72":"y",
      "73":"y",
      "74":"y",
      "75":"y",
      "76":"y",
      "77":"y",
      "78":"y",
      "79":"y",
      "80":"y",
      "81":"y",
      "83":"y",
      "84":"y",
      "85":"y",
      "86":"y",
      "87":"y",
      "88":"y"
    },
    "safari":{
      "3.1":"n",
      "3.2":"n",
      "4":"n",
      "5":"y",
      "5.1":"y",
      "6":"y",
      "6.1":"y",
      "7":"y",
      "7.1":"y",
      "8":"y",
      "9":"y",
      "9.1":"y",
      "10":"y",
      "10.1":"y",
      "11":"y",
      "11.1":"y",
      "12":"y",
      "12.1":"y",
      "13":"y",
      "13.1":"y",
      "14":"y",
      "TP":"y"
    },
    "opera":{
      "9":"n",
      "9.5-9.6":"n",
      "10.0-10.1":"n",
      "10.5":"n",
      "10.6":"n",
      "11":"n",
      "11.1":"n",
      "11.5":"n",
      "11.6":"n",
      "12":"n",
      "12.1":"n",
      "15":"y",
      "16":"y",
      "17":"y",
      "18":"y",
      "19":"y",
      "20":"y",
      "21":"y",
      "22":"y",
      "23":"y",
      "24":"y",
      "25":"y",
      "26":"y",
      "27":"y",
      "28":"y",
      "29":"y",
      "30":"y",
      "31":"y",
      "32":"y",
      "33":"y",
      "34":"y",
      "35":"y",
      "36":"y",
      "37":"y",
      "38":"y",
      "39":"y",
      "40":"y",
      "41":"y",
      "42":"y",
      "43":"y",
      "44":"y",
      "45":"y",
      "46":"y",
      "47":"y",
      "48":"y",
      "49":"y",
      "50":"y",
      "51":"y",
      "52":"y",
      "53":"y",
      "54":"y",
      "55":"y",
      "56":"y",
      "57":"y",
      "58":"y",
      "60":"y",
      "62":"y",
      "63":"y",
      "64":"y",
      "65":"y",
      "66":"y",
      "67":"y",
      "68":"y",
      "69":"y",
      "70":"y"
    },
    "ios_saf":{
      "3.2":"u",
      "4.0-4.1":"u",
      "4.2-4.3":"u",
      "5.0-5.1":"u",
      "6.0-6.1":"u",
      "7.0-7.1":"u",
      "8":"u",
      "8.1-8.4":"u",
      "9.0-9.2":"u",
      "9.3":"u",
      "10.0-10.2":"u",
      "10.3":"u",
      "11.0-11.2":"u",
      "11.3-11.4":"u",
      "12.0-12.1":"u",
      "12.2-12.4":"u",
      "13.0-13.1":"u",
      "13.2":"u",
      "13.3":"u",
      "13.4-13.5":"u",
      "14.0":"u"
    },
    "op_mini":{
      "all":"n"
    },
    "android":{
      "2.1":"u",
      "2.2":"u",
      "2.3":"u",
      "3":"u",
      "4":"u",
      "4.1":"u",
      "4.2-4.3":"u",
      "4.4":"u",
      "4.4.3-4.4.4":"u",
      "81":"u"
    },
    "bb":{
      "7":"u",
      "10":"u"
    },
    "op_mob":{
      "10":"u",
      "11":"u",
      "11.1":"u",
      "11.5":"u",
      "12":"u",
      "12.1":"u",
      "46":"u"
    },
    "and_chr":{
      "84":"y"
    },
    "and_ff":{
      "79":"y"
    },
    "ie_mob":{
      "10":"n",
      "11":"y"
    },
    "and_uc":{
      "12.12":"u"
    },
    "samsung":{
      "4":"u",
      "5.0-5.4":"y",
      "6.2-6.4":"y",
      "7.2-7.4":"y",
      "8.2":"y",
      "9.2":"y",
      "10.1":"y",
      "11.1-11.2":"y",
      "12.0":"y"
    },
    "and_qq":{
      "10.4":"y"
    },
    "baidu":{
      "7.12":"y"
    },
    "kaios":{
      "2.5":"y"
    }
  },
  "notes":"",
  "notes_by_num":{
    "1":"IE9 [supported `dns-prefetch` as `prefetch`](https://blogs.msdn.com/b/ieinternals/archive/2012/03/01/ie10-beta-consumer-preview-minor-changes-changelist.aspx) as the former wasn\u2019t defined yet.",
    "2":"Firefox only supports `dns-prefetch` on HTTP origins. HTTPS is unsupported."
  },
  "usage_perc_y":79.77,
  "usage_perc_a":4.26,
  "ucprefix":false,
  "parent":"",
  "keywords":"",
  "ie_id":"",
  "chrome_id":"",
  "firefox_id":"",
  "webkit_id":"",
  "shown":true
}