How to use Object values with typescript

Question

I am trying to form a  comma separated string from an object    const data     Ticket-1 pdf   8e6e8255-a6e9-4626-9606-4cd255055f71 pdf   Ticket-2 pdf   106c3613-d976-4331-ab0c-d581576e7ca1 pdf    const values   Object values data  map x   gt  x substr 0  x length - 4    const commaJoinedValues   values join       console log commaJoinedValues     How to do this with TypeScript   getting an error file    severity   Error  message   Property  values  does not exist on type  ObjectConstructor    at   216 27  source   ts

User · Answer

I just hit this exact issue with Angular 6 using the CLI and workspaces to create a library using ng g library foo.

In my case the issue was in the tsconfig.lib.json in the library folder which did not have es2017 included in the lib section.

Anyone stumbling across this issue with Angular 6 you just need to ensure that you update you tsconfig.lib.json as well as your application tsconfig.json

User · Answer

I have increased target in my tsconfig json to enable this feature in TypeScript         compilerOptions              target    es2017

User · Answer

Instead of   Object values myObject     use   Object  values   myObject     In your example case   const values   Object  values   data  map x   gt  x substr 0  x length - 4      This will hide the ts compiler error

User · Answer

Even simpler  use   values from underscore js https   underscorejs org  values

User · Answer

Simplest way is to cast the Object to any  like this   const data     Ticket-1 pdf   8e6e8255-a6e9-4626-9606-4cd255055f71 pdf   Ticket-2 pdf   106c3613-d976-4331-ab0c-d581576e7ca1 pdf    const obj    lt any gt Object  const values   obj values data  map x   gt  x substr 0  x length - 4    const commaJoinedValues   values join       console log commaJoinedValues     And voila     no compilation errors

User · Answer

using Object keys instead   const data       a   first     b   second       const values   Object keys data  map key   gt  data key     const commaJoinedValues   values join       console log commaJoinedValues

User · Answer

Having my tslint rules configuration here always replacing the line Object  values   myObject  with Object values myObject     Two options if you have same issue    Object as any  values myObject   or     tslint disable no-string-literal    Object  values   myObject

User · Answer

You can use Object values in TypeScript by doing this   lt any gt Object  values data  if for some reason you can t update to ES7 in tsconfig

User · Answer

Object values   is part of ES2017  and the compile error you are getting is because you need to configure TS to use the ES2017 library  You are probably using ES6 or ES5 library in your current TS configuration   Solution  use es2017 or es2017 object in your --lib compiler option   For example  using tsconfig json    compilerOptions          lib     es2017    dom       Note that targeting ES2017 with TypeScript does not emit polyfills in the browser for ES2017  meaning the above solves your compile error  but you can still encounter a runtime error because the browser doesn t implement ES2017 Object values   it s up to you to polyfill your project code yourself if you want  And since Object values is not yet well supported by all browsers  at the time of this writing  you definitely want a polyfill  core-js will do the job

[typescript] How to use Object.values with typescript?

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