feat(NODE-4787)!: bump minimum Node.js version to v16.20.1 (#590)

.evergreen/config.yml

@@ -95,16 +95,6 @@ functions:
           - .evergreen/run-bundling-test.sh
 
 tasks:
-  - name: node-tests-v14
-    tags: ["node"]
-    commands:
-      - func: fetch source
-        vars:
-          NODE_LTS_VERSION: 14
-      - func: install dependencies
-      - func: run tests
-        vars:
-          TEST_TARGET: node
   - name: node-tests-v16
     tags: ["node"]
     commands:

.evergreen/install-dependencies.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -o errexit  # Exit the script with error if any of the commands fail
 
-NODE_LTS_VERSION=${NODE_LTS_VERSION:-14}
+NODE_LTS_VERSION=${NODE_LTS_VERSION:-16}
 
 source "${PROJECT_DIRECTORY}/.evergreen/init-node-and-npm-env.sh"
 

package.json

@@ -94,7 +94,7 @@
     "require": "./lib/bson.cjs"
   },
   "engines": {
-    "node": ">=14.20.1"
+    "node": ">=16.20.1"
   },
   "scripts": {
     "pretest": "npm run build",

rollup.config.mjs

@@ -9,11 +9,11 @@ const tsConfig = {
   checkJs: false,
   strict: true,
   alwaysStrict: true,
-  target: 'es2020',
+  target: 'es2021',
   module: 'esnext',
   moduleResolution: 'node',
   removeComments: true,
-  lib: ['es2020'],
+  lib: ['es2021'],
   importHelpers: false,
   noEmitHelpers: false,
   noEmitOnError: true,

test/load_bson.js

@@ -5,15 +5,11 @@ const fs = require('node:fs');
 const path = require('node:path');
 const crypto = require('node:crypto');
 
-// TODO(NODE-4787): Node.js 16 was when the atob and btoa globals were introduced, so we need replacements for testing on 14
-const shim_btoa = input => Buffer.prototype.toString.call(Buffer.from(input), 'base64');
-const shim_atob = input => Buffer.from(input, 'base64').toString('binary');
-
 const commonGlobals = {
   TextEncoder,
   TextDecoder,
-  btoa: typeof btoa !== 'undefined' ? btoa : shim_btoa,
-  atob: typeof atob !== 'undefined' ? atob : shim_atob,
+  btoa,
+  atob,
   crypto: {
     getRandomValues(buffer) {
       const random = crypto.randomBytes(buffer.byteLength);

tsconfig.json

@@ -4,12 +4,12 @@
     "checkJs": false,
     "strict": true,
     "alwaysStrict": true,
-    "target": "es2020",
+    "target": "es2021",
     "module": "commonjs",
     "moduleResolution": "node",
     "skipLibCheck": true,
     "lib": [
-      "es2020",
+      "es2021",
     ],
     "outDir": "lib",
     "importHelpers": false,