Move TextEncoder out of lib.dom.d.ts.

Search Terms

TextEncoder

Suggestion

Put (window|global).TextEncoder in a library that is automatically available to both browser and nodejs.

Use Cases

TextEncoder now exists on window in all major browsers as well as on global in NodeJS (as of NodeJS 11). At the moment, the TextEncoder definition lives in lib.dom.d.ts which means it isn't available when working on a project/library that is targeting both NodeJS and Browser.

I don't mind submitting a PR, but I don't know where the appropriate location for such a change is, and how to reconcile it properly with removal from lib.dom.d.ts. It isn't part of an annual ES specification, but it should go somewhere that is automatically included in both browser and node now that it is implemented by both. The specification for it can be found at https://encoding.spec.whatwg.org/ and I believe that is what has been implemented in NodeJS.

Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

まず lib.dom.d.ts を読み、ブラウザーと NodeJS について説明されている TextEncoder の利用可能性を比較します。完了条件は、宣言が lib.dom.d.ts から削除され、ブラウザーと NodeJS の両方のプロジェクトで自動的に利用可能なライブラリに配置されることです。この issue ではテストファイルは指定されていません。