<commit_before>{
  "javascript": {
    "operators": {
      "optional_chaining": {
        "__compat": {
          "description": "Optional chaining operator (<code>?.</code>)",
          "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Optional_chaining",
          "spec_url": "https://tc39.es/proposal-optional-chaining/#top",
          "support": {
            "chrome": {
              "version_added": "79",
              "flags": [
                {
                  "type": "preference",
                  "name": "Experimental JavaScript",
                  "value_to_set": "true"
                }
              ]
            },
            "chrome_android": {
              "version_added": "79",
              "flags": [
                {
                  "type": "preference",
                  "name": "Experimental JavaScript",
                  "value_to_set": "true"
                }
              ]
            },
            "edge": {
              "version_added": false
            },
            "firefox": {
              "version_added": false
            },
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "nodejs": {
              "version_added": false
            },
            "opera": {
              "version_added": "65",
              "flags": [
                {
                  "type": "preference",
                  "name": "Experimental JavaScript",
                  "value_to_set": "true"
                }
              ]
            },
            "opera_android": {
              "version_added": false
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": false
            },
            "webview_android": {
              "version_added": false
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}
<commit_msg>Optional chaining enabled by default in Chrome 80 / FF Nightly 74 (#5656)<commit_after>{
  "javascript": {
    "operators": {
      "optional_chaining": {
        "__compat": {
          "description": "Optional chaining operator (<code>?.</code>)",
          "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Optional_chaining",
          "spec_url": "https://tc39.es/proposal-optional-chaining/#top",
          "support": {
            "chrome": [
              {
                "version_added": "80"
              },
              {
                "version_added": "79",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental JavaScript",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "chrome_android": [
              {
                "version_added": "80"
              },
              {
                "version_added": "79",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental JavaScript",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "edge": {
              "version_added": false
            },
            "firefox": {
              "version_added": "74"
            },
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "nodejs": {
              "version_added": false
            },
            "opera": [
              {
                "version_added": "67"
              },
              {
                "version_added": "65",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental JavaScript",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "opera_android": {
              "version_added": false
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": false
            },
            "webview_android": {
              "version_added": "80"
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}

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