[ERROR] Could not resolve "node:buffer"

Hello, I'm having some issues with building my worker using:

compatibility_flags = [ "nodejs_compat" ]

compatibility_flags = [ "nodejs_compat" ]

I'm using a PNPM monorepo and the import i'm using is as follows:

import { Buffer } from 'node:buffer'

import { Buffer } from 'node:buffer'

I have everything running and working in dev mode, however when I go to build the worker I get the following error:

> node ./build.js

✘ [ERROR] Could not resolve "node:buffer"

    src/index.ts:1:23:
      1 │ import { Buffer } from 'node:buffer'
        ╵                        ~~~~~~~~~~~~~

  The package "node:buffer" wasn't found on the file system but is built into node. Are you trying
  to bundle for node? You can use "platform: 'node'" to do that, which will remove this error.

> node ./build.js

✘ [ERROR] Could not resolve "node:buffer"

    src/index.ts:1:23:
      1 │ import { Buffer } from 'node:buffer'
        ╵                        ~~~~~~~~~~~~~

  The package "node:buffer" wasn't found on the file system but is built into node. Are you trying
  to bundle for node? You can use "platform: 'node'" to do that, which will remove this error.

here is my build.js file with esbuild

import { build } from 'esbuild'

try {
  await build({
    entryPoints: ['./src/index.ts'],
    bundle: true,
    outdir: './dist/',
    sourcemap: true,
    minify: true,
    conditions: ['worker', 'browser'],
    outExtension: { '.js': '.mjs' },
    format: 'esm',
    target: 'esnext',
    plugins: [
    ]
  })
} catch (err) {
  process.exitCode = 1
}

import { build } from 'esbuild'

try {
  await build({
    entryPoints: ['./src/index.ts'],
    bundle: true,
    outdir: './dist/',
    sourcemap: true,
    minify: true,
    conditions: ['worker', 'browser'],
    outExtension: { '.js': '.mjs' },
    format: 'esm',
    target: 'esnext',
    plugins: [
    ]
  })
} catch (err) {
  process.exitCode = 1
}

3 Replies

Hello, I’m Allie!•17mo ago

Try

import { build } from 'esbuild'

try {
  await build({
    entryPoints: ['./src/index.ts'],
    bundle: true,
    outdir: './dist/',
    sourcemap: true,
    minify: true,
    conditions: ['worker', 'browser'],
    outExtension: { '.js': '.mjs' },
    format: 'esm',
    target: 'esnext',
    plugins: [{
    name: "nodejs_compat imports plugin",
    setup(pluginBuild) {
        pluginBuild.onResolve({ filter: /node:.*/ }, () => {
            return { external: true };
        });
    },
    }],
  })
} catch (err) {
  process.exitCode = 1
}

import { build } from 'esbuild'

try {
  await build({
    entryPoints: ['./src/index.ts'],
    bundle: true,
    outdir: './dist/',
    sourcemap: true,
    minify: true,
    conditions: ['worker', 'browser'],
    outExtension: { '.js': '.mjs' },
    format: 'esm',
    target: 'esnext',
    plugins: [{
    name: "nodejs_compat imports plugin",
    setup(pluginBuild) {
        pluginBuild.onResolve({ filter: /node:.*/ }, () => {
            return { external: true };
        });
    },
    }],
  })
} catch (err) {
  process.exitCode = 1
}

From Github

bateswebtechOP•17mo ago

@HardAtWork That did the trick, much appreciated!

maiku4823•14mo ago

Is there any way to get this working with sveltekit using the cloudflare-adapter?

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[ERROR] Could not resolve "node:buffer"