在react react native中运行android项目时出现此错误。
这是React本机版本“ react”的新安装：“ ^ 16.3.1”，“ react-native”：“ ^ 0.57.1”，
它给出了可选链接的错误。任何人都可以帮助我如何在react native中启用可选链接。
Loading dependency graph, done.
BUNDLE [android, dev] ....../index.js ???????????????? 64.3% (667/832)::ffff:127.0.0.1 - - [02/Oct/2018:04:30:46 +0000] "GET /index.delta?platform=android&dev=true&minify=false HTTP/1.1" 500 - "-" "okhttp/3.10.0"
error: bundling failed: SyntaxError: C:\ReactNative\mrn\node_modules\react-native\Libraries\Components\Switch\Switch.js: Support for the experimental syntax 'optionalChaining' isn't currently enabled (103:41):
101 | // Support deprecated color props.
102 | let _thumbColor = thumbColor;
103 | let _trackColorForFalse = trackColor?.false;
| ^
104 | let _trackColorForTrue = trackColor?.true;
105 |
106 | …