{
  "javascript": {
    "builtins": {
      "WeakRef": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakRef",
          "spec_url": "https://tc39.es/ecma262/multipage/managing-memory.html#sec-weak-ref-objects",
          "tags": [
            "web-features:snapshot:ecmascript-2021",
            "web-features:weak-references"
          ],
          "support": {
            "bun": {
              "version_added": "1.0.0"
            },
            "chrome": {
              "version_added": "84"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.0"
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "79"
            },
            "firefox_android": "mirror",
            "nodejs": {
              "version_added": "14.6.0"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "14.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "WeakRef": {
          "__compat": {
            "description": "`WeakRef()` constructor",
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakRef/WeakRef",
            "spec_url": "https://tc39.es/ecma262/multipage/managing-memory.html#sec-weak-ref-constructor",
            "tags": [
              "web-features:snapshot:ecmascript-2021",
              "web-features:weak-references"
            ],
            "support": {
              "bun": {
                "version_added": "1.0.0"
              },
              "chrome": {
                "version_added": "84"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": "1.0"
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "79"
              },
              "firefox_android": "mirror",
              "nodejs": {
                "version_added": "14.6.0"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "14.1"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          },
          "symbol_as_target": {
            "__compat": {
              "description": "Non-registered symbol as target",
              "tags": [
                "web-features:snapshot:ecmascript-2023",
                "web-features:weak-references"
              ],
              "support": {
                "bun": {
                  "version_added": "1.0.0"
                },
                "chrome": {
                  "version_added": "109"
                },
                "chrome_android": "mirror",
                "deno": {
                  "version_added": "1.28"
                },
                "edge": "mirror",
                "firefox": {
                  "version_added": "146"
                },
                "firefox_android": "mirror",
                "nodejs": {
                  "version_added": "20.0.0"
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "16.4"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          }
        },
        "deref": {
          "__compat": {
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakRef/deref",
            "spec_url": "https://tc39.es/ecma262/multipage/managing-memory.html#sec-weak-ref.prototype.deref",
            "tags": [
              "web-features:snapshot:ecmascript-2021",
              "web-features:weak-references"
            ],
            "support": {
              "bun": {
                "version_added": "1.0.0"
              },
              "chrome": {
                "version_added": "84"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": "1.0"
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "79"
              },
              "firefox_android": "mirror",
              "nodejs": {
                "version_added": "14.6.0"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "14.1"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}