error: Big integer literals are not available in the configured target environment ("chrome61", "edge18", "es2019", "firefox60", "safari11")

Describe the bug

During build it throws with:

error: Big integer literals are not available in the configured target environment ("chrome61", "edge18", "es2019", "firefox60", "safari11")

To Reproduce

A new svelte@next init app and a minimal Getting started code from https://github.com/timostamm/protobuf-ts.

(I know, but I don’t have time right now for a new repo)

Expected behavior

I can build.

Can I change the target it detects? Can I remove that “es2019” for example?

Stacktraces

Stack trace

> Transform failed with 2 errors:
pages\players\index.svelte-e4c16403.js:4121:23: error: Big integer literals are not available in the configured target environment ("chrome61", "edge18", "es2019", "firefox60", "safari11")
pages\players\index.svelte-e4c16403.js:4160:23: error: Big integer literals are not available in the configured target environment ("chrome61", "edge18", "es2019", "firefox60", "safari11")
Error: Transform failed with 2 errors:
pages\players\index.svelte-e4c16403.js:4121:23: error: Big integer literals are not available in the configured target environment ("chrome61", "edge18", "es2019", "firefox60", "safari11")
pages\players\index.svelte-e4c16403.js:4160:23: error: Big integer literals are not available in the configured target environment ("chrome61", "edge18", "es2019", "firefox60", "safari11")
    at failureErrorWithLog (C:\kit\node_modules\esbuild\lib\main.js:1224:15)
    at C:\kit\node_modules\esbuild\lib\main.js:1072:33
    at C:\kit\node_modules\esbuild\lib\main.js:568:9
    at handleIncomingPacket (C:\kit\node_modules\esbuild\lib\main.js:657:9)
    at Socket.readFromStdout (C:\kit\node_modules\esbuild\lib\main.js:535:7)
    at Socket.emit (events.js:315:20)
    at addChunk (internal/streams/readable.js:309:12)
    at readableAddChunk (internal/streams/readable.js:284:9)
    at Socket.Readable.push (internal/streams/readable.js:223:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:188:23)

Information about your SvelteKit Installation:

Diagnostics

System: OS: Windows 10 10.0.19042 Binaries: Node: 14.16.0 - C:\Program Files\nodejs\node.EXE npm: 7.8.0 - C:\Program Files\nodejs\npm.CMD npmPackages: @sveltejs/kit: 1.0.0-next.70 => 1.0.0-next.70 svelte: 3.37.0 => 3.37.0 vite: 2.1.5 => 2.1.5

• Your adapter: static

[bluwy]

You can set optimizeDeps.esbuildOptions.target: 'es2020' and build.target: 'es2020' in the vite config to fix the issue (i believe)

[bgins]

Hello 👋. I’ve run into this issue and the recommended solution doesn’t appear to be an option.

When I add

vite: () => ({
    build: {
        target: [ 'es2020' ]
    }
})

to kit in svelte.conifg.js and run npm run build (i.e. svelte-kit build), I get the message:

build_server: The value for kit.vite.build.target specified in svelte.config.js has been ignored. This option is controlled by SvelteKit.

Reading around a bit in the Discord channel and in other issues, it sounds like SveleKit targets es2019 with es2020 lib support. Is there a configuration that will allow for the use of Big integer literals?

I am testing this with the template app recommended on the SvelteKit homepage with TypeScript enabled. I’ve set the tsconfig.json target to es2020 in case there was some interaction there that might be problematic.

My use case would work fine with adapter-static if there is some way that the adapter might help here.

---

Please let me know if I can fill in any additional details or if I should open a new issue on this. Thanks! 🙏