添加区块，变量名报错，This experimental syntax requires enabling the parser plugin: 'optionalChaining' (169:24)

[cumtb1909]

SyntaxError: This experimental syntax requires enabling the parser plugin: 'optionalChaining' (169:24) at Object.raise (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:6344:17) at Object.expectPlugin (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:7664:18) at Object.parseSubscript (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:8448:12) at Object.parseSubscript (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:5288:18) at Object.parseSubscripts (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:8434:19) at Object.parseExprSubscripts (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:8423:17) at Object.parseMaybeUnary (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:8393:21) at Object.parseMaybeUnary (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:5668:20) at Object.parseExprOps (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:8280:23) at Object.parseMaybeConditional (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:8253:23) at Object.parseMaybeAssign (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:8200:21) at Object.parseMaybeAssign (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:5628:20) at Object.parseExpression (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:8148:23) at Object.jsxParseExpressionContainer (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:3450:30) at Object.jsxParseElementAt (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:3544:36) at Object.jsxParseElement (E:\Code\antetc\antetc\node_modules\@umijs\block-sdk\node_modules\@babel\parser\lib\index.js:3587:17) { pos: 4282, loc: Position { line: 169, column: 24 }, missingPlugin: [ 'optionalChaining' ]

添加区块，点击确定，无法添加；

Context

• **Umi Version 最新版本:
• **Node Version：最新版本
• **Platform Win10:

[cumtb1909]

[cumtb1909]

安装下这个，问题就解决了，npm install babel-plugin-dynamic-import-webpack --save-dev，简直了！

[msiripan]

Hi @cumtb1909 ,

安装下这个，问题就解决了，npm install babel-plugin-dynamic-import-webpack --save-dev，简直了！

Do you mind to share your package.json? I followed your suggestion above but no luck still got an error. Btw i use yarn instead of npm.

[XinYueXiao]

感觉进入了死循环，安装了，启动时说这个就说Cannot find module '@umijs/preset-ui' from '/Users/wangxinyue/popmart/matrix' 安装了 @umijs/preset-ui 启动成功就This experimental syntax requires enabling the parser plugin: 'optionalChaining' (169:24)

[Cool-Star]

最后有解决的方法吗？