March 2020
Intermediate to advanced
376 pages
5h 9m
Japanese
Content preview from プログラミングTypeScript ―スケールするJavaScriptアプリケーション開発
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
付録F安全性に関するTSCコンパイラーフラグ
![[Tip]](/api/v2/epubs/urn:orm:book:9784873119045/files/images/tip.png) |
|
利用可能なコンパイラーフラグの完全なリストについては、TypeScript HandbookのWebサイト（http://bit.ly/2JWfsgY）を参照してください。 |
TypeScriptのそれぞれのリリースでは、コードの安全性をさらに高めることを可能にする、新しいチェックが導入されています。これらのコンパイラーフラグのいくつかは、strictフラグの一部として含まれています。strictのさまざまなフラグは、一度に1つずつ選ぶこともできます。表F-1に、本書執筆時点で利用可能な、安全性に関するコンパイラーフラグをリストアップします。
表F-1 安全性に関するTSCのフラグ
| フラグ | 説明 |
|---|---|
alwaysStrict | 'use strict'を出力する |
noEmitOnError | コードに型エラーがある場合、JavaScriptを出力しない |
noFallthroughCasesInSwitch | すべてのswitchのcaseが値を返しているか、またはbreakしていることを確認する |
noImplicitAny | 変数の型がanyと推論される場合、エラーとする |
noImplicitReturns | すべての関数内のすべてのコードパスが明示的にreturnしていることを確認する。「6.2 完全性」を参照 |
noImplicitThis | this型を明示的にアノテートせずに関数内でthisを使用する場合、エラーとする。「4.1.4 thisの型付け」を参照 ... |
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.