proposal-relative-indexing-method
proposal-intl-DateTimeFormat-formatRange
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| proposal-relative-indexing-method | proposal-intl-DateTimeFormat-formatRange | |
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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-intl-DateTimeFormat-formatRange
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Updates from 80th TC39 meeting
Intl.DateFormat.prototype.formatRange Add formatRange(date1, date2) and formatRangeToParts(date1, date2) to Intl.DateTimeFormat to enable date range formatting.
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ES 2021 features (all 5 of them)
intl.DateTimeFormat.formatRange
What are some alternatives?
proposal-temporal - Provides standard objects and functions for working with dates and times.
proposal-private-fields-in-in - EcmaScript proposal to provide brand checks without exceptions
proposal-array-last - A JavaScript TC39 Proposal for getting the last element from an array
proposal-intl-locale-info - An API to expose information of locale, such as week data ( first day of a week, weekend start, weekend end), hour cycle, measurement system, commonly used calendar, etc.
proposal-decimal - Built-in decimal datatype in JavaScript
RegExp.escape - Proposal for investigating RegExp escaping for the ECMAScript standard
proposal-shorthand-improvements - A proposal to introduce new shorthand assignment forms for ECMAScript object literals
proposal-intl-eradisplay - Intl.DateTimeFormat displays era field only if date displayed is in same era as today's
proposal-array-from-async - Draft specification for a proposed Array.fromAsync method in JavaScript.
V8 - The official mirror of the V8 Git repository
proposal-bind-operator - This-Binding Syntax for ECMAScript
proposal-class-brand-check - JavaScript proposal to provide class brand checks