The static directory has been deprecated in favor of the public directory. https://err.sh/vercel/next.js/static-dir-deprecated

[Er-Ramanand-Dubey]

** I am trying to update Nextjs version in my project ..but I am getting this error can anyone help me**

(node:12420) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'unshift' of undefined
at cfg.entry (\next.config.js:51:31)
at async DynamicEntryPlugin.webpackConfig.entry (\node_modules\next\dist\build\webpack-config.js:145:156)
(node:12420) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12420) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Using external babel configuration
Location: ".babelrc"

[jamesmosier]

Could you share some code? 😄 it looks like line 51 in your next.config.js is causing the issues.

[jamesmosier]

If you could provide a full code sample that'd be helpful. It is hard to say without knowing where setDynamic is or what it does.

[Er-Ramanand-Dubey]

which file ?

[jamesmosier]

A good start would be the file that the error is occurring in: \client\polyfills.js

[Er-Ramanand-Dubey]

okay ..this is whole code of file \client\polyfills.js

import includes from 'core-js/library/fn/string/virtual/includes'

import repeat from 'core-js/library/fn/string/virtual/repeat'

import assign from 'core-js/library/fn/object/assign'

import from from 'core-js/library/fn/array/from'

console.log('Load your polyfills')

String.prototype.includes = includes

String.prototype.repeat = repeat

Object.assign = assign

Array.from = from

[jamesmosier]

I'm not sure from looking at that.

You can probably get rid of this custom polyfill altogether. Next includes these polyfills by default.

Here is the complete list: https://github.com/vercel/next.js/blob/canary/packages/next-polyfill-nomodule/src/index.js