`stream-browserify`

[wojpawlik]

Thank you for esm.sh, of all the things I tried this gets me the closest to running telegraf on Deno. But not close enough:

~
$ deno --version
deno 1.7.1 (release, x86_64-pc-windows-msvc)
v8 8.9.255.3
typescript 4.1.3

~
$ deno eval 'import "https://esm.sh/telegraf@4.0.2?dev"'
error: Uncaught SyntaxError: The requested module '/v15/stream-browserify@3.0.0/esnext/stream-browserify.development.js' does not provide an export named 'Readable'
import {Readable} from "/v15/stream-browserify@3.0.0/esnext/stream-browserify.development.js";
        ~~~~~~~~
    at <anonymous> (https://cdn.esm.sh/v15/telegraf@4.0.2/esnext/telegraf.development.js:1542:9)

[1] ~
$

telegraf depends on sandwich-stream, which has an .mjs entry which import { Readable } from 'stream'. This is legal:

~
$ node --version
v14.0.0

~
$ node --input-type=module --eval 'import { Readable } from "stream"'

~
$

However, stream-browserify, used by esm.sh to ponyfill stream, doesn't support it. I can open a PR, but only if @goto-bus-stop or another maintainer promises to actually review it.

Otherwise, esm.sh should switch to better maintained ponyfill, perhaps https://deno.land/std/node/stream.ts?

[goto-bus-stop]

If deno provides a stream module itself, the best option would be to exclude stream from the bundle somehow.

Alternatively, esm.sh could use the readable-stream module directly. stream-browserify uses that, but adds support for some very old Node.js APIs for backwards compatibility. That is necessary for browserify which supports many legacy projects that are many years old, but maybe not for esm.sh which (presumably) targets more modern runtimes.

[ije]

i have a plan to provide all polyfills of nodejs internal module from deno.land/std/node/** to get better deno compatibility, currently i just added the fs polyfill since the std lib doesn't implement all of them.
FYI: https://github.com/postui/esm.sh/tree/master/third_party/polyfills

[shadowtime2000]

I believe readable stream is getting (kind of) built in Deno support from it's maintainers. Might be something to look at.

[v1rtl]

still happens on v47

➜ deno eval 'import "https://esm.sh/telegraf@4.0.2?dev"'
Download https://cdn.esm.sh/v47/@types/node/http
Download https://cdn.esm.sh/v47/@types/node/tls
Download https://cdn.esm.sh/v47/@types/node/url
error: Uncaught SyntaxError: The requested module '/v47/stream-browserify@3.0.0/deno/stream-browserify.development.js' does not provide an export named 'Readable'
import { Readable } from "/v47/stream-browserify@3.0.0/deno/stream-browserify.development.js";
         ~~~~~~~~
    at <anonymous> (https://cdn.esm.sh/v47/sandwich-stream@2.0.2/deno/sandwich-stream.development.js:3:10)

[v1rtl]

on v50 I see this instead:

error: Uncaught TypeError: Class extends value undefined is not a constructor or null
    var MultipartStream = class extends sandwich_stream_1.default {
                                                          ^
    at ../../../../../tmp/esm-build-e948e7e0c235eccfffa26ffd75dac27c9851089e/node_modules/telegraf/lib/core/network/multipart-stream.js (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:1034:59)
    at __require2 (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:31:44)
    at ../../../../../tmp/esm-build-e948e7e0c235eccfffa26ffd75dac27c9851089e/node_modules/telegraf/lib/core/network/client.js (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:1075:30)
    at __require2 (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:31:44)
    at ../../../../../tmp/esm-build-e948e7e0c235eccfffa26ffd75dac27c9851089e/node_modules/telegraf/lib/telegram.js (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:1300:20)
    at __require2 (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:31:44)
    at ../../../../../tmp/esm-build-e948e7e0c235eccfffa26ffd75dac27c9851089e/node_modules/telegraf/lib/telegraf.js (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:1764:22)
    at __require2 (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:31:44)
    at ../../../../../tmp/esm-build-e948e7e0c235eccfffa26ffd75dac27c9851089e/node_modules/telegraf/lib/index.js (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:2445:22)
    at __require2 (http://localhost:3333/v50/telegraf@4.0.2/deno/telegraf.development.js:31:44)

[v1rtl]

on v55 it's this:

error: Uncaught TypeError: Class extends value undefined is not a constructor or null
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:3:22
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:2:1405
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:3:559
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:2:1405
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:3:4797
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:2:1405
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:3:12296
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:2:1405
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:3:24524
    at https://cdn.esm.sh/v55/telegraf@4.0.2/deno/telegraf.js:2:1405

[v1rtl]

same error on v57:

deno eval 'import "https://esm.sh/telegraf@4.0.2?dev&pin=v57"'
error: Uncaught TypeError: Class extends value undefined is not a constructor or null
    var MultipartStream = class extends sandwich_stream_1.default {
                                                          ^
    at esm-build-3a32e3194a944ce6ceab7e19c7552bc1abaff33e-3acba49b/node_modules/telegraf/lib/core/network/multipart-stream.js (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:1036:59)
    at __require2 (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:33:44)
    at esm-build-3a32e3194a944ce6ceab7e19c7552bc1abaff33e-3acba49b/node_modules/telegraf/lib/core/network/client.js (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:1077:30)
    at __require2 (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:33:44)
    at esm-build-3a32e3194a944ce6ceab7e19c7552bc1abaff33e-3acba49b/node_modules/telegraf/lib/telegram.js (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:1302:20)
    at __require2 (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:33:44)
    at esm-build-3a32e3194a944ce6ceab7e19c7552bc1abaff33e-3acba49b/node_modules/telegraf/lib/telegraf.js (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:1766:22)
    at __require2 (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:33:44)
    at esm-build-3a32e3194a944ce6ceab7e19c7552bc1abaff33e-3acba49b/node_modules/telegraf/lib/index.js (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:2447:22)
    at __require2 (https://cdn.esm.sh/v57/telegraf@4.0.2/deno/telegraf.development.js:33:44)

[v1rtl]

it works on v135 now, safe to close