{
  "proposal-class-properties": {
    "chrome": "74",
    "opera": "62",
    "edge": "79",
    "node": "12",
    "samsung": "11",
    "electron": "6.0"
  },
  "proposal-private-methods": {
    "chrome": "84",
    "opera": "70",
    "edge": "84",
    "node": "14.6",
    "electron": "10.0"
  },
  "proposal-numeric-separator": {
    "chrome": "75",
    "opera": "62",
    "edge": "79",
    "firefox": "70",
    "safari": "13",
    "node": "12.5",
    "ios": "13",
    "samsung": "11",
    "electron": "6.0"
  },
  "proposal-logical-assignment-operators": {
    "chrome": "85",
    "firefox": "79",
    "safari": "14",
    "node": "15",
    "electron": "10.0"
  },
  "proposal-nullish-coalescing-operator": {
    "chrome": "80",
    "opera": "67",
    "edge": "80",
    "firefox": "72",
    "safari": "13.1",
    "node": "14",
    "ios": "13.4",
    "samsung": "13",
    "electron": "8.0"
  },
  "proposal-optional-chaining": {
    "chrome": "80",
    "opera": "67",
    "edge": "80",
    "firefox": "74",
    "safari": "13.1",
    "node": "14",
    "ios": "13.4",
    "samsung": "13",
    "electron": "8.0"
  },
  "proposal-json-strings": {
    "chrome": "66",
    "opera": "53",
    "edge": "79",
    "firefox": "62",
    "safari": "12",
    "node": "10",
    "ios": "12",
    "samsung": "9",
    "electron": "3.0"
  },
  "proposal-optional-catch-binding": {
    "chrome": "66",
    "opera": "53",
    "edge": "79",
    "firefox": "58",
    "safari": "11.1",
    "node": "10",
    "ios": "11.3",
    "samsung": "9",
    "electron": "3.0"
  },
  "transform-parameters": {
    "chrome": "49",
    "opera": "36",
    "edge": "18",
    "firefox": "53",
    "safari": "10",
    "node": "6",
    "ios": "10",
    "samsung": "5",
    "electron": "0.37"
  },
  "proposal-async-generator-functions": {
    "chrome": "63",
    "opera": "50",
    "edge": "79",
    "firefox": "57",
    "safari": "12",
    "node": "10",
    "ios": "12",
    "samsung": "8",
    "electron": "3.0"
  },
  "proposal-object-rest-spread": {
    "chrome": "60",
    "opera": "47",
    "edge": "79",
    "firefox": "55",
    "safari": "11.1",
    "node": "8.3",
    "ios": "11.3",
    "samsung": "8",
    "electron": "2.0"
  },
  "transform-dotall-regex": {
    "chrome": "62",
    "opera": "49",
    "edge": "79",
    "firefox": "78",
    "safari": "11.1",
    "node": "8.10",
    "ios": "11.3",
    "samsung": "8",
    "electron": "3.0"
  },
  "proposal-unicode-property-regex": {
    "chrome": "64",
    "opera": "51",
    "edge": "79",
    "firefox": "78",
    "safari": "11.1",
    "node": "10",
    "ios": "11.3",
    "samsung": "9",
    "electron": "3.0"
  },
  "transform-named-capturing-groups-regex": {
    "chrome": "64",
    "opera": "51",
    "edge": "79",
    "firefox": "78",
    "safari": "11.1",
    "node": "10",
    "ios": "11.3",
    "samsung": "9",
    "electron": "3.0"
  },
  "transform-async-to-generator": {
    "chrome": "55",
    "opera": "42",
    "edge": "15",
    "firefox": "52",
    "safari": "11",
    "node": "7.6",
    "ios": "11",
    "samsung": "6",
    "electron": "1.6"
  },
  "transform-exponentiation-operator": {
    "chrome": "52",
    "opera": "39",
    "edge": "14",
    "firefox": "52",
    "safari": "10.1",
    "node": "7",
    "ios": "10.3",
    "samsung": "6",
    "electron": "1.3"
  },
  "transform-template-literals": {
    "chrome": "41",
    "opera": "28",
    "edge": "13",
    "firefox": "34",
    "safari": "13",
    "node": "4",
    "ios": "13",
    "samsung": "3.4",
    "electron": "0.21"
  },
  "transform-literals": {
    "chrome": "44",
    "opera": "31",
    "edge": "12",
    "firefox": "53",
    "safari": "9",
    "node": "4",
    "ios": "9",
    "samsung": "4",
    "electron": "0.30"
  },
  "transform-function-name": {
    "chrome": "51",
    "opera": "38",
    "edge": "79",
    "firefox": "53",
    "safari": "10",
    "node": "6.5",
    "ios": "10",
    "samsung": "5",
    "electron": "1.2"
  },
  "transform-arrow-functions": {
    "chrome": "47",
    "opera": "34",
    "edge": "13",
    "firefox": "45",
    "safari": "10",
    "node": "6",
    "ios": "10",
    "samsung": "5",
    "electron": "0.36"
  },
  "transform-block-scoped-functions": {
    "chrome": "41",
    "opera": "28",
    "edge": "12",
    "firefox": "46",
    "safari": "10",
    "node": "4",
    "ie": "11",
    "ios": "10",
    "samsung": "3.4",
    "electron": "0.21"
  },
  "transform-classes": {
    "chrome": "46",
    "opera": "33",
    "edge": "13",
    "firefox": "45",
    "safari": "10",
    "node": "5",
    "ios": "10",
    "samsung": "5",
    "electron": "0.36"
  },
  "transform-object-super": {
    "chrome": "46",
    "opera": "33",
    "edge": "13",
    "firefox": "45",
    "safari": "10",
    "node": "5",
    "ios": "10",
    "samsung": "5",
    "electron": "0.36"
  },
  "transform-shorthand-properties": {
    "chrome": "43",
    "opera": "30",
    "edge": "12",
    "firefox": "33",
    "safari": "9",
    "node": "4",
    "ios": "9",
    "samsung": "4",
    "electron": "0.27"
  },
  "transform-duplicate-keys": {
    "chrome": "42",
    "opera": "29",
    "edge": "12",
    "firefox": "34",
    "safari": "9",
    "node": "4",
    "ios": "9",
    "samsung": "3.4",
    "electron": "0.25"
  },
  "transform-computed-properties": {
    "chrome": "44",
    "opera": "31",
    "edge": "12",
    "firefox": "34",
    "safari": "7.1",
    "node": "4",
    "ios": "8",
    "samsung": "4",
    "electron": "0.30"
  },
  "transform-for-of": {
    "chrome": "51",
    "opera": "38",
    "edge": "15",
    "firefox": "53",
    "safari": "10",
    "node": "6.5",
    "ios": "10",
    "samsung": "5",
    "electron": "1.2"
  },
  "transform-sticky-regex": {
    "chrome": "49",
    "opera": "36",
    "edge": "13",
    "firefox": "3",
    "safari": "10",
    "node": "6",
    "ios": "10",
    "samsung": "5",
    "electron": "0.37"
  },
  "transform-unicode-escapes": {
    "chrome": "44",
    "opera": "31",
    "edge": "12",
    "firefox": "53",
    "safari": "9",
    "node": "4",
    "ios": "9",
    "samsung": "4",
    "electron": "0.30"
  },
  "transform-unicode-regex": {
    "chrome": "50",
    "opera": "37",
    "edge": "13",
    "firefox": "46",
    "safari": "12",
    "node": "6",
    "ios": "12",
    "samsung": "5",
    "electron": "1.1"
  },
  "transform-spread": {
    "chrome": "46",
    "opera": "33",
    "edge": "13",
    "firefox": "36",
    "safari": "10",
    "node": "5",
    "ios": "10",
    "samsung": "5",
    "electron": "0.36"
  },
  "transform-destructuring": {
    "chrome": "51",
    "opera": "38",
    "edge": "15",
    "firefox": "53",
    "safari": "10",
    "node": "6.5",
    "ios": "10",
    "samsung": "5",
    "electron": "1.2"
  },
  "transform-block-scoping": {
    "chrome": "49",
    "opera": "36",
    "edge": "14",
    "firefox": "51",
    "safari": "11",
    "node": "6",
    "ios": "11",
    "samsung": "5",
    "electron": "0.37"
  },
  "transform-typeof-symbol": {
    "chrome": "38",
    "opera": "25",
    "edge": "12",
    "firefox": "36",
    "safari": "9",
    "node": "0.12",
    "ios": "9",
    "samsung": "3",
    "electron": "0.20"
  },
  "transform-new-target": {
    "chrome": "46",
    "opera": "33",
    "edge": "14",
    "firefox": "41",
    "safari": "10",
    "node": "5",
    "ios": "10",
    "samsung": "5",
    "electron": "0.36"
  },
  "transform-regenerator": {
    "chrome": "50",
    "opera": "37",
    "edge": "13",
    "firefox": "53",
    "safari": "10",
    "node": "6",
    "ios": "10",
    "samsung": "5",
    "electron": "1.1"
  },
  "transform-member-expression-literals": {
    "chrome": "7",
    "opera": "12",
    "edge": "12",
    "firefox": "2",
    "safari": "5.1",
    "node": "0.10",
    "ie": "9",
    "android": "4",
    "ios": "6",
    "phantom": "2",
    "samsung": "1",
    "electron": "0.20"
  },
  "transform-property-literals": {
    "chrome": "7",
    "opera": "12",
    "edge": "12",
    "firefox": "2",
    "safari": "5.1",
    "node": "0.10",
    "ie": "9",
    "android": "4",
    "ios": "6",
    "phantom": "2",
    "samsung": "1",
    "electron": "0.20"
  },
  "transform-reserved-words": {
    "chrome": "13",
    "opera": "10.50",
    "edge": "12",
    "firefox": "2",
    "safari": "3.1",
    "node": "0.10",
    "ie": "9",
    "android": "4.4",
    "ios": "6",
    "phantom": "2",
    "samsung": "1",
    "electron": "0.20"
  },
  "proposal-export-namespace-from": {
    "chrome": "72",
    "and_chr": "72",
    "edge": "79",
    "firefox": "80",
    "node": "13.2",
    "opera": "60",
    "op_mob": "51",
    "samsung": "11.0",
    "android": "72",
    "electron": "5.0"
  }
}