{
  "title":"Cross-document messaging",
  "description":"Method of sending information from a page on one domain to a page on a different one (using postMessage)",
  "spec":"https://html.spec.whatwg.org/multipage/comms.html#crossDocumentMessages",
  "status":"ls",
  "links":[
    {
      "url":"https://developer.mozilla.org/en/DOM/window.postMessage",
      "title":"MDN article"
    },
    {
      "url":"http://html5demos.com/postmessage2",
      "title":"Simple demo"
    },
    {
      "url":"https://raw.github.com/phiggins42/has.js/master/detect/features.js#native-crosswindowmessaging",
      "title":"has.js test"
    },
    {
      "url":"http://docs.webplatform.org/wiki/apis/web-messaging/MessagePort/postMessage",
      "title":"WebPlatform Docs"
    }
  ],
  "bugs":[
    {
      "description":"Internet Explorer 8 and 9, and Firefox versions 6.0 and below only support strings as postMessage's message. References: https://dev.opera.com/articles/view/window-postmessage-messagechannel/#crossdoc, https://developer.mozilla.org/en-US/docs/DOM/window.postMessage"
    },
    {
      "description":"IE8's events are triggered synchronously, which may lead to to unexpected results."
    },
    {
      "description":"Firefox 41 and below do not support sending File/Blob objects [see bug](https://bugzilla.mozilla.org/show_bug.cgi?id=722126)"
    }
  ],
  "categories":[
    "JS API"
  ],
  "stats":{
    "ie":{
      "5.5":"n",
      "6":"n",
      "7":"n",
      "8":"a #1",
      "9":"a #1",
      "10":"a #2",
      "11":"a #2"
    },
    "edge":{
      "12":"y",
      "13":"y",
      "14":"y"
    },
    "firefox":{
      "2":"n",
      "3":"y",
      "3.5":"y",
      "3.6":"y",
      "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"
    },
    "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"
    },
    "safari":{
      "3.1":"n",
      "3.2":"n",
      "4":"y",
      "5":"y",
      "5.1":"y",
      "6":"y",
      "6.1":"y",
      "7":"y",
      "7.1":"y",
      "8":"y",
      "9":"y",
      "9.1":"y",
      "10":"y",
      "TP":"y"
    },
    "opera":{
      "9":"n",
      "9.5-9.6":"y",
      "10.0-10.1":"y",
      "10.5":"y",
      "10.6":"y",
      "11":"y",
      "11.1":"y",
      "11.5":"y",
      "11.6":"y",
      "12":"y",
      "12.1":"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"
    },
    "ios_saf":{
      "3.2":"y",
      "4.0-4.1":"y",
      "4.2-4.3":"y",
      "5.0-5.1":"y",
      "6.0-6.1":"y",
      "7.0-7.1":"y",
      "8":"y",
      "8.1-8.4":"y",
      "9.0-9.2":"y",
      "9.3":"y",
      "10-10.1":"y"
    },
    "op_mini":{
      "all":"y"
    },
    "android":{
      "2.1":"y",
      "2.2":"y",
      "2.3":"y",
      "3":"y",
      "4":"y",
      "4.1":"y",
      "4.2-4.3":"y",
      "4.4":"y",
      "4.4.3-4.4.4":"y",
      "53":"y"
    },
    "bb":{
      "7":"y",
      "10":"y"
    },
    "op_mob":{
      "10":"y",
      "11":"y",
      "11.1":"y",
      "11.5":"y",
      "12":"y",
      "12.1":"y",
      "37":"y"
    },
    "and_chr":{
      "54":"y"
    },
    "and_ff":{
      "50":"y"
    },
    "ie_mob":{
      "10":"a",
      "11":"a"
    },
    "and_uc":{
      "11":"y"
    },
    "samsung":{
      "4":"y"
    }
  },
  "notes":"",
  "notes_by_num":{
    "1":"Partial support refers to only working in frames/iframes (not other tabs/windows). Also, objects cannot be sent using postMessage.",
    "2":"Partial support refers to [limitations in certain conditions](http://stackoverflow.com/questions/16226924/is-cross-origin-postmessage-broken-in-ie10)."
  },
  "usage_perc_y":92.9,
  "usage_perc_a":5.15,
  "ucprefix":false,
  "parent":"",
  "keywords":"",
  "ie_id":"postmessage",
  "chrome_id":"4786174115708928",
  "firefox_id":"",
  "webkit_id":"",
  "shown":true
}