notes
proposal-set-methods
notes | proposal-set-methods | |
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9 | 16 | |
585 | 632 | |
1.0% | 11.4% | |
7.8 | 5.0 | |
about 13 hours ago | about 1 month ago | |
JavaScript | HTML | |
- | GNU General Public License v3.0 or later |
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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- Proposal withdrawn for Function.pipe / flow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
proposal-set-methods
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Use JavaScript's New Set Composition Methods Without Polyfills
There is a proposal to add methods like union and intersection to JavaScript's built-in Set class.
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Updates from the 101th TC39 meeting
Set Methods: New Set methods
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Union, intersection, difference, and more are coming to JavaScript Sets
This article seems to be largely fluff. Here's a link to the proposal with the list of methods being added: https://github.com/tc39/proposal-set-methods?tab=readme-ov-f...
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Mastering data with 7 new JavaScript Set methods
So, 7 new Set methods are under construction now and I will show you the way they interact with data:
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how compare 2 Set ?
They're stage 3, but we're getting new methods just for this sort of stuff. You'd be able to do:
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It’s 2023. Start using JavaScript Map and Set
Coming soon: https://github.com/tc39/proposal-set-methods
- Why I Like Using Maps (and WeakMaps) for Handling DOM Nodes
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[AskJS] What Lodash/<insert utility library> functions do you love?
I'm excited for that one :). They are also coming out with intersection, but only for sets.
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Feedback on my JS library website?
it's highly incompatible with Set helper methods (a stage 3 proposal)
- [AskJS] Is JavaScript missing some built-in methods?
What are some alternatives?
proposal-class-fields - Orthogonally-informed combination of public and private fields proposals
proposal-change-array-by-copy - Provides additional methods on Array.prototype and TypedArray.prototype to enable changes on the array by returning a new copy of it with the change.
proposals - Tracking ECMAScript Proposals
es1995 - ES1995 – The Missing JS Polyfill
proposal-pipeline-operator - A proposal for adding a useful pipe operator to JavaScript.
proposals - ✍️ Tracking the status of Babel's implementation of TC39 proposals (may be out of date)
proposal-function-pipe-flow - A proposal to standardize helper functions for serial function application and function composition.
random-number-js - Generate random numbers with more variety.
Svelte - Cybernetically enhanced web apps
proposal-partial-application - Proposal to add partial application to ECMAScript
esm.sh - A fast, smart, & global CDN for modern(es2015+) web development.
promises-spec - An open standard for sound, interoperable JavaScript promises—by implementers, for implementers.