I was asked this in an interview. I could not answer.
"browserslist": [
">0.2%",
"not dead",
"not ie <= 11",
"not op_mini all"
]
I can see that Its an array. "not ie <=11" means will not run on lower than Internet Explorer v11 "op_mini" must be related to Opera mini.
But I want to know why it is required.
That's a React configuration option to know which browsers the build process should target to.
As the documentation says:
The browserslist configuration controls the outputted JavaScript so that the emitted code will be compatible with the browsers specified.
If you are intend to use a ES feature make sure all browsers specified supports it, otherwise you have to include polyfills manually. React will not do it for you automatically.
See more in: https://facebook.github.io/create-react-app/docs/supported-browsers-features
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