proposal-relative-indexing-method
proposal-structs
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proposal-relative-indexing-method
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Stop using Array[index], use Array.at() instead
If you want to learn more, check out the MDN reference for it. You can also read the original proposal for it.
- ECMAScript 2022 introduces at() method in Array, String, TypedArray
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Learning the new `at()` function, at #jslang
Just like every other array method, it’s type coerced. It’s a problem with all built ins, best not fracture this more in JS without a very good reason. https://github.com/tc39/proposal-relative-indexing-method/issues/40
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10+ Interesting ECMAScript Proposals
.at()
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Updates from the 85th meeting of TC39
.at() .at() method on all the built-in indexables.
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Javascript ES2021 Summary
For a proposal to be finalized, it needs "Two compatible implementations which pass the acceptance tests" (source). This can mean browsers but also includes transpilers like babel. Chrome - which also includes other browsers now like Edge and Opera - will often release stage 3 features publicly before finalized, and Firefox isn't usually far behind, or sometimes even first, as was the case with the currently stage 3 at() method for arrays. Safari is probably the one you have to worry about the most. They tend to be further behind, I think mostly due to their release cadence being longer. Safari, for example, doesn't yet support private methods whereas the other browsers have supported them for some time now. While private methods are stage 4, they are expected to be part of ES2022 which hasn't been published yet - the current being ES2021.
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Can I use .length -1 to call a string value?
Soon we’ll get this nicer version (proposal):
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Stage 3 Proposal: Array.prototype.at
Proposal hosted on GitHub explains the reasoning behind it https://github.com/tc39/proposal-relative-indexing-method
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Array Indexing Method
https://github.com/tc39/proposal-relative-indexing-method#rationale
proposal-structs
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Updates from the 85th meeting of TC39
Fixed shape objects Plain and Shared Structs.
What are some alternatives?
proposal-temporal - Provides standard objects and functions for working with dates and times.
proposal-class-static-block - ECMAScript class static initialization blocks
proposal-array-last - A JavaScript TC39 Proposal for getting the last element from an array
proposal-is-usv-string - a proposal for a method to determine if a String is welll-formed Unicode
proposal-decimal - Built-in decimal datatype in JavaScript
proposal-bigint-math - Draft specification for supporting BigInts in JavaScript’s Math methods.
proposal-shorthand-improvements - A proposal to introduce new shorthand assignment forms for ECMAScript object literals
proposal-array-from-async - Draft specification for a proposed Array.fromAsync method in JavaScript.
proposal-bind-operator - This-Binding Syntax for ECMAScript
proposal-partial-application - Proposal to add partial application to ECMAScript
proposal-accessible-object-hasownproperty - Object.hasOwn() proposal for ECMAScript
proposal-intl-DateTimeFormat-formatRange - ECMA 402 proposal for DateTimeFormat.prototype.{formatRange,formatRangeToParts}