正在跳转至 https://babeljs.io/repl#?babili=false&browsers=&build=&builtIns=false&spec=false&loose=false&code_lz=MYGwhgzhAEAKYCcCmA7ALtA3gKGn6EaYaAlsNCsSQPYrQC80A5AMIAWJlTu-PeJEAIIATAK4gMjNAlFI-0eQHMkGNG2qjFbNAAoAlFnn5owWhGogkAOhDVFOpgBV1m7dE7Q2SMMPcxpYCgQ4GhI0GjU0OycSBDWTHpG-Mhoogh0agJWAPpqGlpo8gC-8vJxqi4FOihIAO4AamAgBjjGxpkQOXmukhR1jSDFpcamQdKiwBEI1WAAtkgtSXgdVpTzDBRzcsYlxmVEpOQgJABuSPqGbfij5pY2dg7HZwlD8kQgANYXrVcmZhbWWz2JjvD4vHbYIpAA&debug=false&forceAllTransforms=false&shippedProposals=false&circleciRepo=&evaluate=true&fileSize=false&timeTravel=false&sourceType=module&lineWrap=false&presets=es2015%2Creact%2Cstage-1%2Cenv&prettier=false&targets=&version=7.7.3&externalPlugins=%40babel%2Fplugin-proposal-class-properties%407.7.0