{
  "title":"CustomEvent",
  "description":"A DOM event interface that can carry custom application-defined data.",
  "spec":"https://dom.spec.whatwg.org/#interface-customevent",
  "status":"ls",
  "links":[
    {
      "url":"https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent",
      "title":"Mozilla Developer Network"
    },
    {
      "url":"https://github.com/krambuhl/custom-event-polyfill",
      "title":"Polyfill based on the MDN snippet"
    },
    {
      "url":"https://github.com/jonathantneal/EventListener",
      "title":"EventListener polyfill which includes a CustomEvent polyfill"
    }
  ],
  "bugs":[
    
  ],
  "categories":[
    "DOM",
    "JS API"
  ],
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      "10.0-10.2":"y"
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    "op_mini":{
      "all":"y"
    },
    "android":{
      "2.1":"n",
      "2.2":"n",
      "2.3":"n",
      "3":"a #1 #2",
      "4":"a #1 #2",
      "4.1":"a #1 #2",
      "4.2-4.3":"a #1 #2",
      "4.4":"y",
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    "bb":{
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    "and_chr":{
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  },
  "notes":"Not supported in some versions of Android's old WebKit-based WebView.",
  "notes_by_num":{
    "1":"While a `window.CustomEvent` object exists, it cannot be called as a constructor. Instead of `new CustomEvent(...)`, you must use `e = document.createEvent('CustomEvent')` and then `e.initCustomEvent(...)`",
    "2":"There is no `window.CustomEvent` object, but `document.createEvent('CustomEvent')` still works."
  },
  "usage_perc_y":91.8,
  "usage_perc_a":5.82,
  "ucprefix":false,
  "parent":"",
  "keywords":"custom events,custom,event",
  "ie_id":"",
  "chrome_id":"",
  "firefox_id":"",
  "webkit_id":"",
  "shown":true
}