SyntaxError: Unexpected token '??=' on manifest.js:286

[rei-vilo]

When launching Node-RED, the node-red-mcu-plugin isn't loaded with the following error

$ node-red
16 Oct 10:36:27 - [info] 

Welcome to Node-RED
===================

16 Oct 10:36:27 - [info] Node-RED version: v3.0.2
16 Oct 10:36:27 - [info] Node.js  version: v14.20.1
16 Oct 10:36:27 - [info] Linux 5.10.0-18-amd64 x64 LE
16 Oct 10:36:27 - [info] Loading palette nodes
/home/reivilo/.node-red/node_modules/@ralphwetzel/node-red-mcu-plugin/lib/manifest.js:286
            mt.build ??= {};
                     ^^^

SyntaxError: Unexpected token '??='
    at wrapSafe (internal/modules/cjs/loader.js:1001:16)
    at Module._compile (internal/modules/cjs/loader.js:1049:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:12)
    at Module.require (internal/modules/cjs/loader.js:974:19)
    at require (internal/modules/cjs/helpers.js:101:18)
    at Object.<anonymous> (/home/reivilo/.node-red/node_modules/@ralphwetzel/node-red-mcu-plugin/mcu_plugin.js:13:21)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
16 Oct 10:36:28 - [info] Dashboard version 3.2.0 started at /ui
16 Oct 10:36:28 - [info] Settings file  : /home/reivilo/.node-red/settings.js
16 Oct 10:36:28 - [info] Context store  : 'default' [module=memory]
16 Oct 10:36:28 - [info] User directory : /home/reivilo/.node-red
16 Oct 10:36:28 - [info] Projects directory: /home/reivilo/.node-red/projects
16 Oct 10:36:28 - [info] Server now running at http://127.0.0.1:1880/
16 Oct 10:36:28 - [info] Active project : Test_MCU
16 Oct 10:36:28 - [info] Flows file     : /home/reivilo/.node-red/projects/Test_MCU/flow.json
16 Oct 10:36:28 - [warn] Using unencrypted credentials
16 Oct 10:36:28 - [info] Starting flows
16 Oct 10:36:28 - [info] Started flows

Commenting the three lines

node-red-mcu-plugin/lib/manifest.js

Lines 285 to 288 in b52b6ad

	// to be sure...
	mt.build ??= {};
	mt.include ??= [];
	mt.modules ??= { "*": [] };

as

            // to be sure...
            // mt.build ??= {};
            // mt.include ??= [];
            // mt.modules ??= { "*": [] };

solves the issue.

[ralphwetzel]

Thank you for your report!
It looks like an issue w/ the version of Node.js. Support for the Logical nullish assignment (??=) operator was implemented (only quite recently) with v15.0.0. As Node-RED recommends v14.x LTS this feature is nice yet "too new".
I'll provide a fix.

[ralphwetzel]

Should be fixed now by f9025cb.

[ralphwetzel]

Confirmed to be fixed.