Cannot find name 'Map' TypeScript React

Question

I have this snippet of code below which generates this error: Cannot find name 'Map'

let scriptMap = new Map();

I had a similar error before with this code Cannot find name 'Promise'. Solved it by running npm install --save @types/es6-promise.

let promise = new Promise((resolve: any, reject: any) => {
                    let resolved = false,

I find a lot of good answers to solve it with Angular 2 here but not otherwise. If I run npm install --save @types/core-js I get a lot more errors than the one I have now. I do not wan't to set my target to es6 in tsconfig.json if I don't have to.

Which version of typescript are you using? Do you have a tsconfig file? If yes, what's the content of that one. — Marc-Andre R.
– Marc-Andre R., Commented Apr 25, 2017 at 11:27
2.1 and yes I have. Solved it myself just now if you see my answer. — Ogglas
– Ogglas, Commented Apr 25, 2017 at 11:35
That's exactly where I was going to bring you. Glad you solved it! — Marc-Andre R.
– Marc-Andre R., Commented Apr 25, 2017 at 12:10

Ogglas · Accepted Answer · 2017-04-25 11:34:33Z

4

Uninstalled es6-promise to avoid duplicates and then added "lib": [ "es5", "es6", "dom" ] to tsconfig.json solved it.

answered Apr 25, 2017 at 11:34

Ogglas

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1 Comment

Sebastian Sebald Over a year ago

That's exactly how you do it :) Maybe to clarify: The used libs depend on your target configuration. For ES5: DOM,ES5,ScriptHost are included and for ES6 it's DOM,ES6,DOM.Iterable,ScriptHost.

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