Question 53832 in Javascript Question posted in
A very good W3school tutorial can be found here.

React JS: SyntaxError: Unexpected token '?' – Javascript

I created a brand new reactJS application via these instructions, ran npm i && npm run dev and I get:

/home/www/node_modules/next/dist/cli/next-dev.js:362
            showAll: args["--show-all"] ?? false,
                                         ^

SyntaxError: Unexpected token '?'
    at wrapSafe (internal/modules/cjs/loader.js:915:16)
    at Module._compile (internal/modules/cjs/loader.js:963:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14)
    at Module.require (internal/modules/cjs/loader.js:887:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.dev (/home/www/node_modules/next/dist/lib/commands.js:10:30)
    at Object.<anonymous> (/home/www/node_modules/next/dist/bin/next:141:28)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
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2

Answers


  1. 0

    You’re using a version of Node.js that doesn’t support this operator. Either replace this operator with equivalent code in your code base or update your Node.js version.

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  2. 0

    Nullish coalescing (??) is supported from Node.js >= 14.x consider updating your Node.js version, or use nvm and nvm use VERSION.

    Edit:

    Next.js v13 dropped support for Node.js 12 and sets the minimum version to 14.6.0(see the release notes)

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