SyntaxError: Unexpected token function reported in chrome 49

[Rengge]

Reproduction

vue2 + webpack

Steps to reproduce the bug

SyntaxError: Unexpected token functionpush../node_modules/.pnpm/pinia@2.1.6_pp5skphzd3senkdxvreehjq3t4/node_modules/pinia/dist/pinia.mjs @ chunk-vendors.js:4135__webpack_require__ @ app.js:854fn @ app.js:151(anonymous function) @ main.ts?cd49:1./src/main.ts @ app.js:1112__webpack_require__ @ app.js:854fn @ app.js:1511 @ app.js:1136__webpack_require__ @ app.js:854checkDeferredModules @ app.js:46(anonymous function) @ app.js:994(anonymous function) @ app.js:997

Expected behavior

normal

Actual behavior

normal

Additional information

No response