typescript中使用类并且声明成员变量后，运行会报 Unexpected token = 错误

typescript中使用类并且声明成员变量后，在UC浏览器中运行会报 Unexpected token = 错误

处理方式

lib中的esnext改成ES2015，增加target:ES2015

{
  "extends": "@vue/tsconfig/tsconfig.json",
  "compilerOptions": {
    "target": "ES2015",
    "sourceMap": true,
    "baseUrl": ".",
    "paths": {
      "@/*": ["./src/*"]
    },
    "lib": ["ES2015", "dom"],
    "types": ["@dcloudio/types"]
  },
  "include": ["src/**/*.ts", "src/**/*.d.ts", "src/**/*.tsx", "src/**/*.vue"]
}