TypeError: JSON.stringify cannot serialize BigInt. Improve BigInt support (maybe).

[adrian7]

Hello I'm a newbie to typecript and decided to give brisa a try. After stumbling on some issues regarding to my lack of skill, today I had the misfortune to stumble across a very weird one:

brisa dev
[ info ]   🚀 Brisa 0.2.3: Running on Bun.js 1.1.43
[ wait ]  starting the development server...
[ wait ]  compiling 6 server entrypoints...
[ wait ]  compiling server actions...
[ wait ]  analyzing and preparing client build...
[ error ]   Ops! Error:
[ error ]   --------------------------
[ error ]   Failed to build
[ error ]   JSON.stringify cannot serialize BigInt.
[ error ]   --------------------------
[ error ]   TypeError: JSON.stringify cannot serialize BigInt.
    at stringify (unknown)
    at Pa (/home/moustacios/Workspace/Aivatar.Art/app/node_modules/brisa/out/cli/build.js:104:1955)
    at processTicksAndRejections (native:7:39)

This happened after I have added the mongodb lib and written a function to return the result of .insertOne() as follows:

export async function saveUser(
    payer: UserDetails,
    transactionId:string
) {
    const user:UserAccount = {
        ....
    };

    //(!) TODO cannot return here due to error
    return await UsersCollection.insertOne(user);
}

After some research on stack overflow, I found a suggested solution here: GoogleChromeLabs/jsbi#30 (comment)

I added, the file src/types/global.d.ts and copied the declaration to src/pages/index.tsx. But nothing changed... . So I went around anc copied the declaration randomly at the top of other files hoping for misjudgment on my side.
Finally when I copied the declaration in src/middleware.ts the error went away 😃 .

I was really puzzled on the solution but glad I can continue.

The solution I'd like

I would like bigint to be supported by default, and not have to deal with these issue in future versions.

Alternative solutions I've considered

I was pretty annoyed of the fact that bun itself, does not complain about BigInt, but Brisa does.
So was considering writing an API separate of the brisa app, only running on bun, or switching to another framework.

Thanks.

[aralroca]

@adrian7 In order to better debug where this serialization is occurring, could you please report a minimal reproducible example to make sure we solve this? Thanks a lot and thanks to report it!

[aralroca]

Ok for the line of the crash, looks this JSON.stringify of the server AST:

brisa/packages/brisa/src/utils/analyze-server-ast/index.ts

Line 14 in fdbae64

JSON.stringify(ast, (key, value) => {

[aralroca]

Ok, it's easy to reproduce it, is not necessarily a reproducible repo example @adrian7.

[aralroca]

@adrian7 is fixed on 0.2.4-canary.4

[adrian7]

Wow thanks for the help @aralroca 👍🏽 . Keep up the good work guys!