Build fails for svelte sample due to rollup-plugin-svelte not loading in SDK 4.2.0 (module is not defined)

[BoostN]

When attempting to build the svelte-ui-page-sample using the ServiceNow SDK, the build fails during the prebuild step with a module loading error.

The failure appears to occur when now.prebuild.mjs attempts to require rollup-plugin-svelte.

[ide] Building Svelte UI Example ... [info] Using SDK 4 runtime loaded from disk at: /d784d194f0f74d0783f07bb902f227a7 [info] Starting build [ svelte-ui-page-sample | x_svelteuisample | 0.0.1 ] [info] @servicenow/sdk version: 4.2.0 [info] Fluent Sources: src/fluent [info] Server Modules: src/server [info] Output: dist/app [info] Running script "prebuild" from /d784d194f0f74d0783f07bb902f227a7/now.prebuild.mjs [ide] [ERROR] Failed to build Svelte UI Example : Could not require /d784d194f0f74d0783f07bb902f227a7/now.prebuild.mjs from https://<instance>.service-now.com/sn_glider_app/virtual-module:/.../node_modules/@servicenow/sdk/dist/web/index.js Could not require rollup-plugin-svelte from https://<instance>.service-now.com/sn_glider_app/virtual-module:/.../now.prebuild.mjs module is not defined

This is my package.json:
{ "name": "svelte-ui-page-sample", "version": "0.0.1", "description": "", "license": "UNLICENSED", "scripts": { "build": "now-sdk build", "deploy": "now-sdk install", "transform": "now-sdk transform", "types": "now-sdk dependencies" }, "devDependencies": { "@servicenow/glide": "27.0.3", "@servicenow/sdk": "5.48.0", "typescript": "5.8.2", "eslint": "8.50.0", "@servicenow/eslint-plugin-sdk-app-plugin": "4.2.0", "@servicenow/isomorphic-rollup": "^1.2.1", "svelte": "5.38.7", "rollup-plugin-svelte": "7.1.6", "@rollup/plugin-node-resolve": "16.0.1", "@rollup/plugin-commonjs": "28.0.1" } }
Also, you can just clone the repo around this: https://github.com/ServiceNow/sdk-examples/tree/main/svelte-ui-page-sample and it still fails. I will admit I'm a bit new to this SDK Process so I could be missing something.

[venkat-kaluva]

Hi @BoostN, Can you install dependencies(cmd/win + shift + p and search for Package Manager: Install Dependencies), and see if there are any errors while downloading dependencies ?

If not, can you try building the app after the dependencies are downloaded

[BoostN]

Thanks for the reply. I did follow your steps with no errors on the dependciecy install. When I choose "Build and Install" I get this:

[ide] Building Svelte UI Example ...
[info] Using SDK 4 runtime loaded from disk at: /d784d194f0f74d0783f07bb902f227a7
[info] Starting build [ svelte-ui-page-sample | x_svelteuisample | 0.0.1 ]
[info] @servicenow/sdk version: 4.2.0
[info] Fluent Sources: src/fluent
[info] Server Modules: src/server
[info] Output: dist/app
[info] Running script "prebuild" from /d784d194f0f74d0783f07bb902f227a7/now.prebuild.mjs
[ide] [ERROR] Failed to build Svelte UI Example
: Could not require /d784d194f0f74d0783f07bb902f227a7/now.prebuild.mjs from https://xxxxx.service-now.com/sn_glider_app/virtual-module:/d784d194f0f74d0783f07bb902f227a7/node_modules/@servicenow/sdk/dist/web/index.js?c=3915212540
Could not require rollup-plugin-svelte from https://xxxxx.service-now.com/sn_glider_app/virtual-module:/d784d194f0f74d0783f07bb902f227a7/now.prebuild.mjs?c=3952950969
Cannot read properties of undefined (reading 'split')

Note, the prebuild file is an exact copy of this one: https://github.com/ServiceNow/sdk-examples/blob/main/svelte-ui-page-sample/now.prebuild.mjs

[bryce-godfrey]

Appears you are trying to do this from the ServiceNow IDE and getting the error correct? We will try to repro that, see what is going on. I tried this on desktop/cli without any errors at least.

[BoostN]

Yes, ServiceNow IDE.