atob polyfill fails during build on Node 16 with ReferenceError: window is not defined

General information

https://github.com/braintree/braintree-web/blob/main/src/lib/vendor/polyfill.js (commit: cf1b052cc7ddff4ffa62b8da69674ac5d663e0e3)

Issue description

Node 16 ships with atob and btoa global functions, whereas Node 14 does not.

On our build machine with Node 16 we tried building a Next.js project which uses braintree-web. braintree-web/blob/main/src/lib/vendor/polyfill.js runs as part of the build process, and it fails at this line:

var atobNormalized = typeof atob === 'function' ? window.atob : atobPolyfill;

The problem here is that in NodeJS 16 atob is defined, and therefore it tries to get it from window.atob, which fails with ReferenceError: window is not defined because window is not defined during the build process.

#11 76.82 > Build error occurred
#11 76.82 ReferenceError: window is not defined
#11 76.82     at Object.<anonymous> (/app/node_modules/braintree-web/lib/vendor/polyfill.js:3:51)
#11 76.82     at Module._compile (node:internal/modules/cjs/loader:1109:14)
#11 76.82     at Object.Module._extensions..js (node:internal/modules/cjs/loader:1138:10)
#11 76.82     at Module.load (node:internal/modules/cjs/loader:989:32)
#11 76.82     at Function.Module._load (node:internal/modules/cjs/loader:829:14)
#11 76.82     at Module.require (node:internal/modules/cjs/loader:1013:19)
#11 76.82     at require (node:internal/modules/cjs/helpers:93:18)
#11 76.82     at Object.<anonymous> (/app/node_modules/braintree-web/lib/create-authorization-data.js:3:12)
#11 76.82     at Module._compile (node:internal/modules/cjs/loader:1109:14)
#11 76.82     at Object.Module._extensions..js (node:internal/modules/cjs/loader:1138:10) {
#11 76.82   type: 'ReferenceError'

[crookedneighbor]

This is fixed in v3.79.0

[zmarty]

Yeah we are using Node 14 for now. Thanks!