ola5doc/sys/node_modules/caniuse-db/features-json/const.json

{
  "title":"const",
  "description":"Declares a constant with block level scope",
  "spec":"http://www.ecma-international.org/ecma-262/6.0/#sec-let-and-const-declarations",
  "status":"other",
  "links":[
    {
      "url":"http://generatedcontent.org/post/54444832868/variables-and-constants-in-es6",
      "title":"Variables and Constants in ES6"
    },
    {
      "url":"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const",
      "title":"Const (MDN)"
    }
  ],
  "bugs":[
    
  ],
  "categories":[
    "JS API"
  ],
  "stats":{
    "ie":{
      "5.5":"n",
      "6":"n",
      "7":"n",
      "8":"n",
      "9":"n",
      "10":"n",
      "11":"y"
    },
    "edge":{
      "12":"y",
      "13":"y",
      "14":"y"
    },
    "firefox":{
      "2":"a #1",
      "3":"a #1",
      "3.5":"a #1",
      "3.6":"a #1",
      "4":"a #1",
      "5":"a #1",
      "6":"a #1",
      "7":"a #1",
      "8":"a #1",
      "9":"a #1",
      "10":"a #1",
      "11":"a #1",
      "12":"a #1",
      "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":"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":"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 #3",
      "22":"a #2 #3",
      "23":"a #2 #3",
      "24":"a #2 #3",
      "25":"a #2 #3",
      "26":"a #2 #3",
      "27":"a #2 #3",
      "28":"a #2 #3",
      "29":"a #2 #3",
      "30":"a #2 #3",
      "31":"a #2 #3",
      "32":"a #2 #3",
      "33":"a #2 #3",
      "34":"a #2 #3",
      "35":"a #2 #3",
      "36":"a #2 #3",
      "37":"a #2 #3",
      "38":"a #2 #3",
      "39":"a #2 #3",
      "40":"a #2 #3",
      "41":"a #4",
      "42":"a #4",
      "43":"a #4",
      "44":"a #4",
      "45":"a #4",
      "46":"a #4",
      "47":"a #4",
      "48":"a #4",
      "49":"y",
      "50":"y",
      "51":"y",
      "52":"y",
      "53":"y",
      "54":"y",
      "55":"y",
      "56":"y",
      "57":"y"
    },
    "safari":{
      "3.1":"a #2",
      "3.2":"a #2",
      "4":"a #2",
      "5":"a #2",
      "5.1":"a #2 #3",
      "6":"a #2 #3",
      "6.1":"a #2 #3",
      "7":"a #2 #3",
      "7.1":"a #2 #3",
      "8":"a #2 #3",
      "9":"a #2 #3",
      "9.1":"a #2 #3",
      "10":"y",
      "TP":"y"
    },
    "opera":{
      "9":"n",
      "9.5-9.6":"n",
      "10.0-10.1":"a #1",
      "10.5":"a #1",
      "10.6":"a #1",
      "11":"a #1",
      "11.1":"a #1",
      "11.5":"a #1",
      "11.6":"a #1 #3",
      "12":"a #1 #3",
      "12.1":"a #1 #3",
      "15":"a #2 #3",
      "16":"a #2 #3",
      "17":"a #2 #3",
      "18":"a #2 #3",
      "19":"a #2 #3",
      "20":"a #2 #3",
      "21":"a #2 #3",
      "22":"a #2 #3",
      "23":"a #2 #3",
      "24":"a #2 #3",
      "25":"a #2 #3",
      "26":"a #2 #3",
      "27":"a #2 #3",
      "28":"a #4",
      "29":"a #4",
      "30":"a #4",
      "31":"a #4",
      "32":"a #4",
      "33":"a #4",
      "34":"a #4",
      "35":"a #4",
      "36":"y",
      "37":"y",
      "38":"y",
      "39":"y",
      "40":"y",
      "41":"y",
      "42":"y",
      "43":"y"
    },
    "ios_saf":{
      "3.2":"a #2",
      "4.0-4.1":"a #2",
      "4.2-4.3":"a #2",
      "5.0-5.1":"a #2 #3",
      "6.0-6.1":"a #2 #3",
      "7.0-7.1":"a #2 #3",
      "8":"a #2 #3",
      "8.1-8.4":"a #2 #3",
      "9.0-9.2":"a #2 #3",
      "9.3":"a #2 #3",
      "10-10.1":"y"
    },
    "op_mini":{
      "all":"a #1 #3"
    },
    "android":{
      "2.1":"u",
      "2.2":"u",
      "2.3":"a #2",
      "3":"a #2 #3",
      "4":"a #2 #3",
      "4.1":"a #2 #3",
      "4.2-4.3":"a #2 #3",
      "4.4":"a #2 #3",
      "4.4.3-4.4.4":"a #2 #3",
      "53":"y"
    },
    "bb":{
      "7":"a #2 #3",
      "10":"a #2 #3"
    },
    "op_mob":{
      "10":"a #1",
      "11":"a #1",
      "11.1":"a #1",
      "11.5":"a #1",
      "12":"a #1 #3",
      "12.1":"a #1 #3",
      "37":"y"
    },
    "and_chr":{
      "54":"y"
    },
    "and_ff":{
      "50":"y"
    },
    "ie_mob":{
      "10":"n",
      "11":"y"
    },
    "and_uc":{
      "11":"a #2 #3"
    },
    "samsung":{
      "4":"a #4"
    }
  },
  "notes":"",
  "notes_by_num":{
    "1":"const is recognized, but treated like var (no block scope, can be overwritten)",
    "2":"const does not have block scope",
    "3":"Only recognized when NOT in strict mode",
    "4":"Supported correctly in strict mode, otherwise supported without block scope"
  },
  "usage_perc_y":71.93,
  "usage_perc_a":25.12,
  "ucprefix":false,
  "parent":"",
  "keywords":"ES6,constant,block,scope",
  "ie_id":"",
  "chrome_id":"4645595339816960",
  "firefox_id":"",
  "webkit_id":"",
  "shown":true
}