{
  "javascript": {
    "operators": {
      "function": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/function",
          "spec_url": "https://tc39.es/ecma262/#sec-function-definitions",
          "support": {
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              "version_added": "1"
            },
            "chrome_android": {
              "version_added": "18"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
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            },
            "firefox_android": {
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            },
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            },
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            },
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            },
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            },
            "safari": {
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            },
            "safari_ios": {
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            },
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            },
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            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "trailing_comma": {
          "__compat": {
            "description": "Trailing comma in parameters",
            "support": {
              "chrome": {
                "version_added": "58"
              },
              "chrome_android": {
                "version_added": "58"
              },
              "edge": {
                "version_added": "79"
              },
              "firefox": {
                "version_added": "52"
              },
              "firefox_android": {
                "version_added": "52"
              },
              "ie": {
                "version_added": false
              },
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                "version_added": "8.0.0"
              },
              "opera": {
                "version_added": "45"
              },
              "opera_android": {
                "version_added": "43"
              },
              "safari": {
                "version_added": false
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": {
                "version_added": "7.0"
              },
              "webview_android": {
                "version_added": "58"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}