SlideShare a Scribd company logo

TypeScript Meetup #1 Build 2019 update

TypeScript Meetup #1 Build 2019 update

1 of 22
Download to read offline
TypeScript Meetup #1
Typescript Build 2019 update
Kenichiro Nakamura
Sr. Software Engineer
TypeScript Meetup #1 Build 2019 update
Walkthrough Build 2019 site
Intro
What’s new in TypeScript
BRK 3023
Productive front-end development with
JavaScript, Visual Studio Code, and Azure
(JAMStack)
BRK 3021
One Language to Rule Them All: TypeScript
CFS 2022

Recommended

LINE Developer Day 2019 how to optimize bot development lifecycle with dev ops
LINE Developer Day 2019 how to optimize bot development lifecycle with dev opsLINE Developer Day 2019 how to optimize bot development lifecycle with dev ops
LINE Developer Day 2019 how to optimize bot development lifecycle with dev opsKenichiro Nakamura
 
MTDDC 2019 LINE ボットからみた MT Data API の可能性
MTDDC 2019 LINE ボットからみた MT Data API の可能性MTDDC 2019 LINE ボットからみた MT Data API の可能性
MTDDC 2019 LINE ボットからみた MT Data API の可能性Kenichiro Nakamura
 
ボット開発でも DevOps! BotBuilder のテスト手法
ボット開発でも DevOps! BotBuilder のテスト手法ボット開発でも DevOps! BotBuilder のテスト手法
ボット開発でも DevOps! BotBuilder のテスト手法Kenichiro Nakamura
 
.NET ラボ 勉強会 C# でラインプラットフォーム開発
.NET ラボ 勉強会 C# でラインプラットフォーム開発.NET ラボ 勉強会 C# でラインプラットフォーム開発
.NET ラボ 勉強会 C# でラインプラットフォーム開発Kenichiro Nakamura
 
Microsoft Azure Cognitive Services
Microsoft Azure Cognitive ServicesMicrosoft Azure Cognitive Services
Microsoft Azure Cognitive ServicesKenichiro Nakamura
 
EdgeAI: Azure IoT Edge カスタムモジュール開発
EdgeAI: Azure IoT Edge カスタムモジュール開発EdgeAI: Azure IoT Edge カスタムモジュール開発
EdgeAI: Azure IoT Edge カスタムモジュール開発Kenichiro Nakamura
 

More Related Content

More from Kenichiro Nakamura

エッジ・組み込みAI勉強会 : コンテナで使う Cognitive Service
エッジ・組み込みAI勉強会 : コンテナで使う Cognitive Serviceエッジ・組み込みAI勉強会 : コンテナで使う Cognitive Service
エッジ・組み込みAI勉強会 : コンテナで使う Cognitive ServiceKenichiro Nakamura
 
SQL Server 2019 Master Data Service
SQL Server 2019 Master Data ServiceSQL Server 2019 Master Data Service
SQL Server 2019 Master Data ServiceKenichiro Nakamura
 
いま考えられる限り最も速く対話型アプリを開発する方法
いま考えられる限り最も速く対話型アプリを開発する方法いま考えられる限り最も速く対話型アプリを開発する方法
いま考えられる限り最も速く対話型アプリを開発する方法Kenichiro Nakamura
 
Extended Events 101 : Japan SQL Server User Group
Extended Events 101 : Japan SQL Server User GroupExtended Events 101 : Japan SQL Server User Group
Extended Events 101 : Japan SQL Server User GroupKenichiro Nakamura
 
Tech-on Meet Up #02 Microsoft のコンテナ活用事例
Tech-on Meet Up #02 Microsoft のコンテナ活用事例Tech-on Meet Up #02 Microsoft のコンテナ活用事例
Tech-on Meet Up #02 Microsoft のコンテナ活用事例Kenichiro Nakamura
 
JSSUG: SQL Sever Performance Tuning
JSSUG: SQL Sever Performance TuningJSSUG: SQL Sever Performance Tuning
JSSUG: SQL Sever Performance TuningKenichiro Nakamura
 
LT: 開発者が意識するべき チャットボットの UX と アーキテクチャ
LT: 開発者が意識するべきチャットボットの UX とアーキテクチャLT: 開発者が意識するべきチャットボットの UX とアーキテクチャ
LT: 開発者が意識するべき チャットボットの UX と アーキテクチャKenichiro Nakamura
 
今更聞けない!?Microsoft Graph で始める Office 365 データ活用と事例の紹介
今更聞けない!?Microsoft Graph で始める Office 365 データ活用と事例の紹介今更聞けない!?Microsoft Graph で始める Office 365 データ活用と事例の紹介
今更聞けない!?Microsoft Graph で始める Office 365 データ活用と事例の紹介Kenichiro Nakamura
 
LINE Bot リッチメニュー使ってる?
LINE Bot リッチメニュー使ってる?LINE Bot リッチメニュー使ってる?
LINE Bot リッチメニュー使ってる?Kenichiro Nakamura
 
What's new for developers in Dynamics 365 v9: Client API enhancement
What's new for developers in Dynamics 365 v9: Client API enhancementWhat's new for developers in Dynamics 365 v9: Client API enhancement
What's new for developers in Dynamics 365 v9: Client API enhancementKenichiro Nakamura
 

More from Kenichiro Nakamura (13)

エッジ・組み込みAI勉強会 : コンテナで使う Cognitive Service
エッジ・組み込みAI勉強会 : コンテナで使う Cognitive Serviceエッジ・組み込みAI勉強会 : コンテナで使う Cognitive Service
エッジ・組み込みAI勉強会 : コンテナで使う Cognitive Service
 
SQL Server 2019 Master Data Service
SQL Server 2019 Master Data ServiceSQL Server 2019 Master Data Service
SQL Server 2019 Master Data Service
 
いま考えられる限り最も速く対話型アプリを開発する方法
いま考えられる限り最も速く対話型アプリを開発する方法いま考えられる限り最も速く対話型アプリを開発する方法
いま考えられる限り最も速く対話型アプリを開発する方法
 
Azure for hackathon
Azure for hackathonAzure for hackathon
Azure for hackathon
 
Extended Events 101 : Japan SQL Server User Group
Extended Events 101 : Japan SQL Server User GroupExtended Events 101 : Japan SQL Server User Group
Extended Events 101 : Japan SQL Server User Group
 
Tech-on Meet Up #02 Microsoft のコンテナ活用事例
Tech-on Meet Up #02 Microsoft のコンテナ活用事例Tech-on Meet Up #02 Microsoft のコンテナ活用事例
Tech-on Meet Up #02 Microsoft のコンテナ活用事例
 
JSSUG: SQL Sever Index Tuning
JSSUG: SQL Sever Index TuningJSSUG: SQL Sever Index Tuning
JSSUG: SQL Sever Index Tuning
 
JSSUG: SQL Sever Performance Tuning
JSSUG: SQL Sever Performance TuningJSSUG: SQL Sever Performance Tuning
JSSUG: SQL Sever Performance Tuning
 
LT: 開発者が意識するべき チャットボットの UX と アーキテクチャ
LT: 開発者が意識するべきチャットボットの UX とアーキテクチャLT: 開発者が意識するべきチャットボットの UX とアーキテクチャ
LT: 開発者が意識するべき チャットボットの UX と アーキテクチャ
 
今更聞けない!?Microsoft Graph で始める Office 365 データ活用と事例の紹介
今更聞けない!?Microsoft Graph で始める Office 365 データ活用と事例の紹介今更聞けない!?Microsoft Graph で始める Office 365 データ活用と事例の紹介
今更聞けない!?Microsoft Graph で始める Office 365 データ活用と事例の紹介
 
LINE Bot リッチメニュー使ってる?
LINE Bot リッチメニュー使ってる?LINE Bot リッチメニュー使ってる?
LINE Bot リッチメニュー使ってる?
 
Line Bot with C#
Line Bot with C#Line Bot with C#
Line Bot with C#
 
What's new for developers in Dynamics 365 v9: Client API enhancement
What's new for developers in Dynamics 365 v9: Client API enhancementWhat's new for developers in Dynamics 365 v9: Client API enhancement
What's new for developers in Dynamics 365 v9: Client API enhancement
 

Recently uploaded

Relationship Counselling: From Disjointed Features to Product-First Thinking ...
Relationship Counselling: From Disjointed Features to Product-First Thinking ...Relationship Counselling: From Disjointed Features to Product-First Thinking ...
Relationship Counselling: From Disjointed Features to Product-First Thinking ...Product School
 
Dev Dives: Leverage APIs and Gen AI to power automations for RPA and software...
Dev Dives: Leverage APIs and Gen AI to power automations for RPA and software...Dev Dives: Leverage APIs and Gen AI to power automations for RPA and software...
Dev Dives: Leverage APIs and Gen AI to power automations for RPA and software...UiPathCommunity
 
Leonis Insights: The State of AI (7 trends for 2023 and 7 predictions for 2024)
Leonis Insights: The State of AI (7 trends for 2023 and 7 predictions for 2024)Leonis Insights: The State of AI (7 trends for 2023 and 7 predictions for 2024)
Leonis Insights: The State of AI (7 trends for 2023 and 7 predictions for 2024)Jay Zhao
 
Python For Kids - Sách Lập trình cho trẻ em
Python For Kids - Sách Lập trình cho trẻ emPython For Kids - Sách Lập trình cho trẻ em
Python For Kids - Sách Lập trình cho trẻ emNho Vĩnh
 
Revolutionizing The Banking Industry: The Monzo Way by CPO, Monzo
Revolutionizing The Banking Industry: The Monzo Way by CPO, MonzoRevolutionizing The Banking Industry: The Monzo Way by CPO, Monzo
Revolutionizing The Banking Industry: The Monzo Way by CPO, MonzoProduct School
 
AI improves software testing to be more fault tolerant, focused and efficient
AI improves software testing to be more fault tolerant, focused and efficientAI improves software testing to be more fault tolerant, focused and efficient
AI improves software testing to be more fault tolerant, focused and efficientKari Kakkonen
 
Utilising Energy Modelling for LCSF and PSDS Funding Applications
Utilising Energy Modelling for LCSF and PSDS Funding ApplicationsUtilising Energy Modelling for LCSF and PSDS Funding Applications
Utilising Energy Modelling for LCSF and PSDS Funding ApplicationsIES VE
 
Enterprise Architecture As Strategy - Book Review
Enterprise Architecture As Strategy - Book ReviewEnterprise Architecture As Strategy - Book Review
Enterprise Architecture As Strategy - Book ReviewAshraf Fouad
 
Roundtable_-_API_Research__Testing_Tools.pdf
Roundtable_-_API_Research__Testing_Tools.pdfRoundtable_-_API_Research__Testing_Tools.pdf
Roundtable_-_API_Research__Testing_Tools.pdfMostafa Higazy
 
IT Nation Evolve event 2024 - Quarter 1
IT Nation Evolve event 2024  - Quarter 1IT Nation Evolve event 2024  - Quarter 1
IT Nation Evolve event 2024 - Quarter 1Inbay UK
 
KUBRICK Graphs: A journey from in vogue to success-ion
KUBRICK Graphs: A journey from in vogue to success-ionKUBRICK Graphs: A journey from in vogue to success-ion
KUBRICK Graphs: A journey from in vogue to success-ionNeo4j
 
HBR SERIES METAL HOUSED RESISTORS POWER ELECTRICAL ABSORBS HIGH CURRENT DURIN...
HBR SERIES METAL HOUSED RESISTORS POWER ELECTRICAL ABSORBS HIGH CURRENT DURIN...HBR SERIES METAL HOUSED RESISTORS POWER ELECTRICAL ABSORBS HIGH CURRENT DURIN...
HBR SERIES METAL HOUSED RESISTORS POWER ELECTRICAL ABSORBS HIGH CURRENT DURIN...htrindia
 
PrismCRM-RealEstate-SalesCRM_byCode5Company
PrismCRM-RealEstate-SalesCRM_byCode5CompanyPrismCRM-RealEstate-SalesCRM_byCode5Company
PrismCRM-RealEstate-SalesCRM_byCode5CompanyMustafa Kuğu
 
Launching New Products In Companies Where It Matters Most by Product Director...
Launching New Products In Companies Where It Matters Most by Product Director...Launching New Products In Companies Where It Matters Most by Product Director...
Launching New Products In Companies Where It Matters Most by Product Director...Product School
 
Act Like an Owner, Challenge Like a VC by former CPO, Tripadvisor
Act Like an Owner,  Challenge Like a VC by former CPO, TripadvisorAct Like an Owner,  Challenge Like a VC by former CPO, Tripadvisor
Act Like an Owner, Challenge Like a VC by former CPO, TripadvisorProduct School
 
Improving IT Investment Decisions and Business Outcomes with Integrated Enter...
Improving IT Investment Decisions and Business Outcomes with Integrated Enter...Improving IT Investment Decisions and Business Outcomes with Integrated Enter...
Improving IT Investment Decisions and Business Outcomes with Integrated Enter...Cprime
 
National Institute of Standards and Technology (NIST) Cybersecurity Framework...
National Institute of Standards and Technology (NIST) Cybersecurity Framework...National Institute of Standards and Technology (NIST) Cybersecurity Framework...
National Institute of Standards and Technology (NIST) Cybersecurity Framework...MichaelBenis1
 
Introducing the New FME Community Webinar - Feb 21, 2024 (2).pdf
Introducing the New FME Community Webinar - Feb 21, 2024 (2).pdfIntroducing the New FME Community Webinar - Feb 21, 2024 (2).pdf
Introducing the New FME Community Webinar - Feb 21, 2024 (2).pdfSafe Software
 
Huntly presentation deck design for Behance
Huntly presentation deck design for BehanceHuntly presentation deck design for Behance
Huntly presentation deck design for Behancewhalesdesign
 
Confoo 2024 Gettings started with OpenAI and data science
Confoo 2024 Gettings started with OpenAI and data scienceConfoo 2024 Gettings started with OpenAI and data science
Confoo 2024 Gettings started with OpenAI and data scienceSusan Ibach
 

Recently uploaded (20)

Relationship Counselling: From Disjointed Features to Product-First Thinking ...
Relationship Counselling: From Disjointed Features to Product-First Thinking ...Relationship Counselling: From Disjointed Features to Product-First Thinking ...
Relationship Counselling: From Disjointed Features to Product-First Thinking ...
 
Dev Dives: Leverage APIs and Gen AI to power automations for RPA and software...
Dev Dives: Leverage APIs and Gen AI to power automations for RPA and software...Dev Dives: Leverage APIs and Gen AI to power automations for RPA and software...
Dev Dives: Leverage APIs and Gen AI to power automations for RPA and software...
 
Leonis Insights: The State of AI (7 trends for 2023 and 7 predictions for 2024)
Leonis Insights: The State of AI (7 trends for 2023 and 7 predictions for 2024)Leonis Insights: The State of AI (7 trends for 2023 and 7 predictions for 2024)
Leonis Insights: The State of AI (7 trends for 2023 and 7 predictions for 2024)
 
Python For Kids - Sách Lập trình cho trẻ em
Python For Kids - Sách Lập trình cho trẻ emPython For Kids - Sách Lập trình cho trẻ em
Python For Kids - Sách Lập trình cho trẻ em
 
Revolutionizing The Banking Industry: The Monzo Way by CPO, Monzo
Revolutionizing The Banking Industry: The Monzo Way by CPO, MonzoRevolutionizing The Banking Industry: The Monzo Way by CPO, Monzo
Revolutionizing The Banking Industry: The Monzo Way by CPO, Monzo
 
AI improves software testing to be more fault tolerant, focused and efficient
AI improves software testing to be more fault tolerant, focused and efficientAI improves software testing to be more fault tolerant, focused and efficient
AI improves software testing to be more fault tolerant, focused and efficient
 
Utilising Energy Modelling for LCSF and PSDS Funding Applications
Utilising Energy Modelling for LCSF and PSDS Funding ApplicationsUtilising Energy Modelling for LCSF and PSDS Funding Applications
Utilising Energy Modelling for LCSF and PSDS Funding Applications
 
Enterprise Architecture As Strategy - Book Review
Enterprise Architecture As Strategy - Book ReviewEnterprise Architecture As Strategy - Book Review
Enterprise Architecture As Strategy - Book Review
 
Roundtable_-_API_Research__Testing_Tools.pdf
Roundtable_-_API_Research__Testing_Tools.pdfRoundtable_-_API_Research__Testing_Tools.pdf
Roundtable_-_API_Research__Testing_Tools.pdf
 
IT Nation Evolve event 2024 - Quarter 1
IT Nation Evolve event 2024  - Quarter 1IT Nation Evolve event 2024  - Quarter 1
IT Nation Evolve event 2024 - Quarter 1
 
KUBRICK Graphs: A journey from in vogue to success-ion
KUBRICK Graphs: A journey from in vogue to success-ionKUBRICK Graphs: A journey from in vogue to success-ion
KUBRICK Graphs: A journey from in vogue to success-ion
 
HBR SERIES METAL HOUSED RESISTORS POWER ELECTRICAL ABSORBS HIGH CURRENT DURIN...
HBR SERIES METAL HOUSED RESISTORS POWER ELECTRICAL ABSORBS HIGH CURRENT DURIN...HBR SERIES METAL HOUSED RESISTORS POWER ELECTRICAL ABSORBS HIGH CURRENT DURIN...
HBR SERIES METAL HOUSED RESISTORS POWER ELECTRICAL ABSORBS HIGH CURRENT DURIN...
 
PrismCRM-RealEstate-SalesCRM_byCode5Company
PrismCRM-RealEstate-SalesCRM_byCode5CompanyPrismCRM-RealEstate-SalesCRM_byCode5Company
PrismCRM-RealEstate-SalesCRM_byCode5Company
 
Launching New Products In Companies Where It Matters Most by Product Director...
Launching New Products In Companies Where It Matters Most by Product Director...Launching New Products In Companies Where It Matters Most by Product Director...
Launching New Products In Companies Where It Matters Most by Product Director...
 
Act Like an Owner, Challenge Like a VC by former CPO, Tripadvisor
Act Like an Owner,  Challenge Like a VC by former CPO, TripadvisorAct Like an Owner,  Challenge Like a VC by former CPO, Tripadvisor
Act Like an Owner, Challenge Like a VC by former CPO, Tripadvisor
 
Improving IT Investment Decisions and Business Outcomes with Integrated Enter...
Improving IT Investment Decisions and Business Outcomes with Integrated Enter...Improving IT Investment Decisions and Business Outcomes with Integrated Enter...
Improving IT Investment Decisions and Business Outcomes with Integrated Enter...
 
National Institute of Standards and Technology (NIST) Cybersecurity Framework...
National Institute of Standards and Technology (NIST) Cybersecurity Framework...National Institute of Standards and Technology (NIST) Cybersecurity Framework...
National Institute of Standards and Technology (NIST) Cybersecurity Framework...
 
Introducing the New FME Community Webinar - Feb 21, 2024 (2).pdf
Introducing the New FME Community Webinar - Feb 21, 2024 (2).pdfIntroducing the New FME Community Webinar - Feb 21, 2024 (2).pdf
Introducing the New FME Community Webinar - Feb 21, 2024 (2).pdf
 
Huntly presentation deck design for Behance
Huntly presentation deck design for BehanceHuntly presentation deck design for Behance
Huntly presentation deck design for Behance
 
Confoo 2024 Gettings started with OpenAI and data science
Confoo 2024 Gettings started with OpenAI and data scienceConfoo 2024 Gettings started with OpenAI and data science
Confoo 2024 Gettings started with OpenAI and data science
 

TypeScript Meetup #1 Build 2019 update

  • 1. TypeScript Meetup #1 Typescript Build 2019 update Kenichiro Nakamura Sr. Software Engineer
  • 4. What’s new in TypeScript BRK 3023
  • 5. Productive front-end development with JavaScript, Visual Studio Code, and Azure (JAMStack) BRK 3021
  • 6. One Language to Rule Them All: TypeScript CFS 2022
  • 7. Inside TypeScript with Anders Hejlsberg BDL 2011
  • 14. Release date Significant changes 0.8 1 October 2012 0.9 18 June 2013 1.1 6 October 2014 performance improvements 1.3 12 November 2014 protected modifier, tuple types 1.4 20 January 2015 union types, let and const declarations, template strings, type guards, type aliases 1.5 20 July 2015 ES6 modules, namespace keyword, for..of support, decorators 1.6 16 September 2015 JSX support, intersection types, local type declarations, abstract classes and methods, user-defined type guard fu 1.7 30 November 2015 async and await support, 1.8 22 February 2016 constraints generics, control flow analysis errors, string literal types, allowJs 2.0 22 September 2016 null- and undefined-aware types, control flow based type analysis, discriminated union types, never type, readon 2.1 8 November 2016 keyof and lookup types, mapped types, object spread and rest, 2.2 22 February 2017 mix-in classes, object type, 2.3 27 April 2017 async iteration, generic parameter defaults, strict option 2.4 27 June 2017 dynamic import expressions, string enums, improved inference for generics, strict contravariance for callback par 2.5 31 August 2017 optional catch clause variables 2.6 31 October 2017 strict function types 2.7 31 January 2018 constant-named properties, fixed length tuples 2.8 27 March 2018 conditional types, improved keyof with intersection types 2.9 14 May 2018 support for symbols and numeric literals in keyof and mapped object types 3.0 30 July 2018 project references, extracting and spreading parameter lists with tuples 3.1 27 September 2018 mappable tuple and array types 3.2 30 November 2018 stricter checking for bind, call, and apply 3.3 31 January 2019 relaxed rules on methods of union types, incremental builds for composite projects 3.4 29 March 2019 faster incremental builds, type inference from generic functions, readonly modifier for arrays, const assertions, ty
  • 15. Release date Significant changes 0.8 1 October 2012 0.9 18 June 2013 1.1 6 October 2014 performance improvements 1.3 12 November 2014 protected modifier, tuple types 1.4 20 January 2015 union types, let and const declarations, template strings, type guards, type aliases 1.5 20 July 2015 ES6 modules, namespace keyword, for..of support, decorators 1.6 16 September 2015 JSX support, intersection types, local type declarations, abstract classes and methods, user-defined type guard fu 1.7 30 November 2015 async and await support, 1.8 22 February 2016 constraints generics, control flow analysis errors, string literal types, allowJs 2.0 22 September 2016 null- and undefined-aware types, control flow based type analysis, discriminated union types, never type, readon 2.1 8 November 2016 keyof and lookup types, mapped types, object spread and rest, 2.2 22 February 2017 mix-in classes, object type, 2.3 27 April 2017 async iteration, generic parameter defaults, strict option 2.4 27 June 2017 dynamic import expressions, string enums, improved inference for generics, strict contravariance for callback par 2.5 31 August 2017 optional catch clause variables 2.6 31 October 2017 strict function types 2.7 31 January 2018 constant-named properties, fixed length tuples 2.8 27 March 2018 conditional types, improved keyof with intersection types 2.9 14 May 2018 support for symbols and numeric literals in keyof and mapped object types 3.0 30 July 2018 project references, extracting and spreading parameter lists with tuples 3.1 27 September 2018 mappable tuple and array types 3.2 30 November 2018 stricter checking for bind, call, and apply 3.3 31 January 2019 relaxed rules on methods of union types, incremental builds for composite projects 3.4 29 March 2019 faster incremental builds, type inference from generic functions, readonly modifier for arrays, const assertions, ty
  • 17. TypeScript 1.x 2014/10 - 2016/2 7 versions
  • 19. TypeScript 2.x 2016/9 - 2018/5 10 versions --pretty
  • 21. TypeScript 3.x 2016/9 - 2018/5 10 versions
  • 22. TypeScript TypeScript 1.0 詳説 Build 2016 What’s new in TypeScript Build 2017 What’s new in TypeScript Build 2018 What’s new in TypeScript がんばらない Vue.js 〜 Visual Studio Code + TypeScript で クールに Vue.js の開発をしよう!

Editor's Notes

  1. Core: TypeScript evolve faster for last 2 years Action: Keep using it to catch up the latest technologies Learn useful resource
  2. https://mybuild.techcommunity.microsoft.com/sessions?q=TypeScript&t=%257B%2522from%2522%253A%25222019-05-06T08%253A00%253A00-07%253A00%2522%252C%2522to%2522%253A%25222019-05-08T19%253A45%253A00-07%253A00%2522%257D#top-anchor
  3. Make JavaScript into Typed Language to support Enterprise scale projects. It’s a statically typed superset of JavaScript to compile into JavaScript
  4. It’s not new language at all. It’s super set of JavaScript so you don’t have to worry too much. And type language skill is useful when you do typed language like C#, Java, etc.
  5. JavaScript is popular and Node.js makes the language run in server. Enterprise start using it a lot and the size of the project bigger and bigger. To write stable code, you need Typed Language with great tooling support. To support Enterprise scale project, object-oriented language is mandatory. Features from the future.
  6. Control flow base analysis -> "strict": true
  7. Control flow base analysis -> "strict": true