notes
esm.sh
notes | esm.sh | |
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9 | 58 | |
585 | 2,825 | |
1.0% | 1.7% | |
7.8 | 9.8 | |
about 11 hours ago | 9 days ago | |
JavaScript | Go | |
- | MIT License |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
notes
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Union, intersection, difference, and more are coming to JavaScript Sets
Has anything changed recently? The proposal has been in stage 3 since November 2022 [1]
[1] https://github.com/tc39/notes/blob/HEAD/meetings/2022-11/nov...
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The TC-39 just introduced a new stage: stage 2.7
If you're curious about the naming scheme (it now goes 0 -> 1 -> 2 -> 2.7 -> 3 -> 4), then you can read the discussion surrounding the name from the last meeting notes [1].
Also, for a quicker digest, Rob Palmer (from the committee) tweeted about it [2]
[1] https://github.com/tc39/notes/blob/main/meetings/2023-11/nov...
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JavaScript Type Annotations Proposal Update
Dialog for this update is at https://github.com/tc39/notes/blob/main/meetings/2023-03/mar...
What I would like is a "use: 'typechecked'" at the top of the file indicating that the code has already been checked. This would be accompanied by a new proprosal that defines a standard for what is considered checked (for example checking nullablity in the types) and would allow for browsers to make some optimizations. This could also perhaps reduce the amount of necessary runtime checks such that it would be possible to make it a fully sound typesystem with most of the checks done beforehand.
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ES Modules Are Terrible
All the meeting notes are recorded here: https://github.com/tc39/notes/tree/main/meetings. You’ll have to do a bit of spelunking in the corresponding agendas and proposal repo to narrow down the exact meetings you’re interested in.
- Proposal withdrawn for JavaScript Function.pipe / flow
- Proposal withdrawn for Function.pipe / flow
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Deno joins TC39
Here's a list of delegates for TC39, but it doesn't list people by their ECMA member organization.
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Class fields and private class members are now stage 4, ready for ES2022
This is a good question. I'm not sure I saw the notes of the meeting when this happened, but all the notes are public here: https://github.com/tc39/notes/tree/master/meetings
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History of JavaScript - How it came into the existence
TC-39 is a group of people who are responsible for the standards. They have meetings every two months with member-appointed delegates and invited experts. You can check the minutes of those meetings here GitHub repository
esm.sh
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Building a self-creating website with Supabase and AI
/* eslint-disable @typescript-eslint/ban-ts-comment */ // Follow this setup guide to integrate the Deno language server with your editor: // https://deno.land/manual/getting_started/setup_your_environment // This enables autocomplete, go to definition, etc. import { corsHeaders } from "../_shared/cors.ts"; import { createClient } from "https://esm.sh/@supabase/[email protected]"; import randomSample from "https://esm.sh/@stdlib/[email protected]"; import Replicate from "https://esm.sh/[email protected]"; import { base64 } from "https://cdn.jsdelivr.net/gh/hexagon/base64@1/src/base64.js"; const supabaseClient = createClient( Deno.env.get("SUPABASE_URL") ?? "", Deno.env.get("SUPABASE_SERVICE_ROLE_KEY") ?? "" ); const replicate = new Replicate({ auth: Deno.env.get("REPLICATE_API_TOKEN") ?? "", }); // @ts-expect-error Deno.serve(async (req) => { if (req.method === "OPTIONS") { return new Response("ok", { headers: corsHeaders }); } const { record } = await req.json(); const thought_id = record.id; if (!thought_id) { return new Response("Missing thought_id", { status: 400, headers: { "Content-Type": "application/json", ...corsHeaders }, }); } const allObjectIDsResponse = await fetch( "https://collectionapi.metmuseum.org/public/collection/v1/objects?departmentIds=11", { method: "GET", headers: { "Content-Type": "application/json", Accept: "application/json", }, } ); const { objectIDs } = await allObjectIDsResponse.json(); const listOfArtworks = []; const addedIDs: number[] = []; while (listOfArtworks.length < 80) { const randomObjectID = randomSample(objectIDs, { size: 1 })[0]; if (addedIDs.includes(randomObjectID)) continue; const res = await fetch( `https://collectionapi.metmuseum.org/public/collection/v1/objects/${randomObjectID}`, { method: "GET", headers: { "Content-Type": "application/json", Accept: "application/json", }, } ); const artwork = await res.json(); if (!artwork.primaryImageSmall) continue; addedIDs.push(artwork.objectID); listOfArtworks.push({ image_url: artwork.primaryImageSmall, artist_name: artwork.artistDisplayName, title: artwork.title, is_main: listOfArtworks.length === 0, is_variant: false, thought_id, }); } const mainImage = listOfArtworks[0]; const output = await replicate.run( "yorickvp/llava-13b:b5f6212d032508382d61ff00469ddda3e32fd8a0e75dc39d8a4191bb742157fb", { input: { image: mainImage.image_url, top_p: 1, prompt: "Describe this painting by " + mainImage.artist_name, max_tokens: 1024, temperature: 0.2, }, } ); const file = await fetch(mainImage.image_url).then((res) => res.blob()); const promises = []; for (let i = 0; i < 8; i++) { const body = new FormData(); body.append( "prompt", output.join("") + `, a painting by ${mainImage.artist_name}` ); body.append("output_format", "jpeg"); body.append("mode", "image-to-image"); body.append("image", file); body.append("strength", clamp(Math.random(), 0.4, 0.7)); const request = fetch( `${Deno.env.get( "STABLE_DIFFUSION_HOST" )}/v2beta/stable-image/generate/sd3`, { method: "POST", headers: { Accept: "application/json", Authorization: `Bearer ${Deno.env.get("STABLE_DIFFUSION_API_KEY")}`, }, body, } ); promises.push(request); } const results = await Promise.all(promises); const variants = await Promise.all(results.map((res) => res.json())); await supabaseClient.from("artworks").insert(listOfArtworks); for (let i = 0; i < variants.length; i++) { const variant = variants[i]; const randomId = Math.random(); await supabaseClient.storage .from("variants") .upload( `${thought_id}/${randomId}.jpeg`, base64.toArrayBuffer(variant.image), { contentType: "image/jpeg", } ); await supabaseClient.from("artworks").insert({ image_url: `${Deno.env.get( "SUPABASE_URL" )}/storage/v1/object/public/variants/${thought_id}/${randomId}.jpeg`, artist_name: mainImage.artist_name, is_main: false, is_variant: true, thought_id, }); } await supabaseClient .from("thoughts") .update({ generating: false }) .eq("id", thought_id); return new Response(JSON.stringify({ main: mainImage }), { headers: { "Content-Type": "application/json", ...corsHeaders }, }); }); function clamp(value: number, min: number, max: number) { return Math.min(Math.max(value, min), max); }
- Bun 1.1
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Show HN: Comma Separated Values (CSV) to Unicode Separated Values (USV)
const extism = await import("https://esm.sh/@extism/extism");
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JSR: The JavaScript Registry
Unpkg serves whatever is published to NPM, and if it's a library intended for the browser, that often includes minified versions ready for use in script tags, for example, https://unpkg.com/[email protected]/mithril.min.js. Sometimes the default export is CJS (which has require() calls), in which case, you can usually use the browse url that I mentioned to see if there's another export you can use.
https://esm.sh/ is definitely a good option too if you're OK with modules.
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Deno Cron
* Change my NPM imports to something that would work with Deno. The most straightforward thing to do was just change `import "foo"` to `import "npm:foo"`, but this felt hacky so eventually I used https://esm.sh, which worked for some packages but not others.
- Esm.sh/Run
- Esm.sh run – 1KB script allows you to write JSX/TSX in HTML without build
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Supabase - allow user login with pin
import { createClient } from "https://esm.sh/@supabase/supabase-js@2"; import { create, Payload } from "https://deno.land/x/[email protected]/mod.ts"; interface User { username: string; pin: string; } const supabase = createClient(Deno.env.get('SUPABASE_URL'), Deno.env.get('SUPABASE_SERVICE_ROLE_KEY')); const handler = async (req: Request): Promise => { if (req.method !== 'POST') { return new Response(null, { status: 405 }); } const { username, pin } = await req.json() as Vehicle; if (!username|| !pin) { return new Response(JSON.stringify({ error: 'username and PIN are required' }), { status: 400 }); } const { data, error } = await supabase .from('users') .select('*') .eq('username', username) .eq('pin', pin) .single(); if (error || !data) { return new Response(JSON.stringify({ valid: false }), { status: 401 }); } const jwtSecret = Deno.env.get('JWT_SECRET') as string;; const payload: Payload = { "username": username }; try { const token = await create({ alg: "HS256", typ: "JWT" }, payload, jwtSecret); // This line has the error console.log(token); return new Response(JSON.stringify({ token }), { status: 200 }); } catch (error) { console.error('Error creating JWT:', error); return new Response(JSON.stringify({ error: 'Error creating JWT' }), { status: 500 }); } }; Deno.serve(handler);
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Let's optimize dependency management with URL Imports
Easily serve libraries from local server/private VPS: You can try to serve and cache libraries by running esm.sh to improve loading times on your server side. Or to keep things simple, just upload a code to pastebin or similar services and directly use it here!
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Building a Slack Bot for AI-Powered Conversations with Supabase
import { serve } from 'https://deno.land/[email protected]/http/server.ts'; import { WebClient } from 'https://deno.land/x/[email protected]/mod.js'; import { SupabaseClient } from 'https://esm.sh/@supabase/supabase-js@2'; const slack_bot_token = Deno.env.get("SLACK_TOKEN") ?? ""; const bot_client = new WebClient(slack_bot_token); const supabase_url = Deno.env.get("SUPABASE_URL") ?? ""; const service_role = Deno.env.get("SUPABASE_SERVICE_ROLE_KEY"); const supabase = new SupabaseClient(supabase_url, service_role); console.log(`Slack URL verification function up and running!`); serve(async (req) => { try { const req_body = await req.json(); console.log(JSON.stringify(req_body, null, 2)); const { token, challenge, type, event } = req_body; if (type == 'url_verification') { return new Response(JSON.stringify({ challenge }), { headers: { 'Content-Type': 'application/json' }, status: 200, }); } else if (event.type == 'app_mention') { const { user, text, channel, ts } = event; const url_path = text.toLowerCase() .includes('code') ? '/code' : '/general'; const { error } = await supabase.from('job_queue').insert({ http_verb: 'POST', payload: { user, text, channel, ts }, url_path: url_path }); if (error) { console.error(error); return new Response(JSON.stringify({ error: error.message }), { headers: { 'Content-Type': 'application/json' }, status: 400, }); } await post(channel, ts, `Taking a look and will get back to you shortly!`); return new Response('', { status: 200 }); } } catch (error) { return new Response(JSON.stringify({ error: error.message }), { headers: { 'Content-Type': 'application/json' }, status: 400, }); } }); async function post(channel: string, thread_ts: string, message: string): Promise { try { const result = await bot_client.chat.postMessage({ channel: channel, thread_ts: thread_ts, text: message, }); console.info(result); } catch (e) { console.error(`Error posting message: ${e}`); } }
What are some alternatives?
proposal-class-fields - Orthogonally-informed combination of public and private fields proposals
import-maps - How to control the behavior of JavaScript imports
proposals - Tracking ECMAScript Proposals
jsdelivr - A free, fast, and reliable Open Source CDN for npm, GitHub, Javascript, and ESM
proposal-pipeline-operator - A proposal for adding a useful pipe operator to JavaScript.
deno - A modern runtime for JavaScript and TypeScript.
proposal-function-pipe-flow - A proposal to standardize helper functions for serial function application and function composition.
esbuild - An extremely fast bundler for the web
Svelte - Cybernetically enhanced web apps
eleventy-high-performance-blog - A high performance blog template for the 11ty static site generator.
proposal-decorators - Decorators for ES6 classes
dayjs - ⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API