{ "plugins": [ [ "babel-plugin-transform-es2015-classes", ["babel-plugin-transform-builtin-classes", { "build": "JSON.stringify(Object.getOwnPropertyNames(window).filter(name => /^[A-Z]/.test(name)).sort(), null, ' ')", "globals": [ "AnalyserNode", "AnimationEvent", "AppBannerPromptResult", "ApplicationCache", "ApplicationCacheErrorEvent", "Array", "ArrayBuffer", "Attr", "Audio", "AudioBuffer", "AudioBufferSourceNode", "AudioContext", "AudioDestinationNode", "AudioListener", "AudioNode", "AudioParam", "AudioProcessingEvent", "AudioScheduledSourceNode", "BarProp", "BaseAudioContext", "BatteryManager", "BeforeInstallPromptEvent", "BeforeUnloadEvent", "BiquadFilterNode", "Blob", "BlobEvent", "Boolean", "BroadcastChannel", "ByteLengthQueuingStrategy", "CDATASection", "CSS", "CSSConditionRule", "CSSFontFaceRule", "CSSGroupingRule", "CSSImportRule", "CSSKeyframeRule", "CSSKeyframesRule", "CSSMediaRule", "CSSNamespaceRule", "CSSPageRule", "CSSRule", "CSSRuleList", "CSSStyleDeclaration", 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"Window", "Worker", "WritableStream", "XMLDocument", "XMLHttpRequest", "XMLHttpRequestEventTarget", "XMLHttpRequestUpload", "XMLSerializer", "XPathEvaluator", "XPathExpression", "XPathResult", "XSLTProcessor" ] }] ] ] }