Error: TSError: ⨯ Unable to compile TypeScript
Solution 1
I had met same issue. First I remove ts-node
and typescript
from package.json
. then,
npm install ts-node --save-dev
npm install typescript -g
npm install typescript --save-dev
Solution 2
I came here looking for a solution for a similar error when I updated my typescript version, Mine was not a new project, I am running an angular2 project with "@angular/cli": "1.2.0"
. I updated my typescript version from 2.0.3
to 2.7.2
and then I was getting similar issues like below while running ng e2e
.
Error: TSError: ⨯ Unable to compile TypeScript Cannot find type definition file for 'core-js'. (2688) Cannot find type definition file for 'grecaptcha'. (2688) Cannot find type definition file for 'jasmine'. (2688) Cannot find type definition file for 'moment-timezone'. (2688) Cannot find type definition file for 'node'. (2688) Cannot find type definition file for 'q'. (2688)
The proposed solutions in this post didn't work for me.
I fixed it by updating ts-node
to 5.0.1
. Versions above this were giving errors like the one below while running ng e2e
even though I had experimentalDecorators
set to true
in tsconfig.json
:
error TS1219: Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning
Apart from the above change, I also changed few lines in protractor.conf.js
Changed:
beforeLaunch: function () {
require('ts-node').register({
project: 'e2e'
});
},
to
beforeLaunch: function () {
require('ts-node/register')
}
This is for people who may stumble into this post and the proposed solution doesn't work for them.
Solution 3
For me, the solution was changing "jsx": "react-jsx"
to "jsx": "react"
in the tsconfig.json
file.
RicoLiu
Updated on January 27, 2022Comments
-
RicoLiu over 2 years
I am facing the problem:
My Project is built on Angular4 with typescript, e2e testing with protractor & karma.
Travis-ci has this error:
[03:34:54] E/launcher - Error: TSError: ⨯ Unable to compile TypeScript Cannot find type definition file for 'jasmine'. (2688) Cannot find type definition file for 'node'. (2688) e2e/app.e2e-spec.ts (1,32): Cannot find module './app.po'. (2307) e2e/app.e2e-spec.ts (4,1): Cannot find name 'describe'. (2304) e2e/app.e2e-spec.ts (7,3): Cannot find name 'beforeEach'. (2304) e2e/app.e2e-spec.ts (11,3): Cannot find name 'it'. (2304) e2e/app.e2e-spec.ts (13,5): Cannot find name 'expect'. (2304) The command "ng e2e" exited with 4.
My tsconfig.json:
{ "compileOnSave": false, "compilerOptions": { "outDir": "./dist/out-tsc", "baseUrl": ".", "paths": { "*": ["./node_modules/*", "*"] }, "sourceMap": true, "declaration": false, "moduleResolution": "node", "emitDecoratorMetadata": true, "experimentalDecorators": true, "target": "es5", "types": [ "node", "jasmine" ], "typeRoots": [ "./node_modules/@types" ], "lib": [ "es2016", "dom" ] } }
My tsconfig.spec.json:
{ "compilerOptions": { "sourceMap": true, "declaration": false, "moduleResolution": "node", "emitDecoratorMetadata": true, "experimentalDecorators": true, "lib": [ "es2016", "dom" ], "outDir": "../out-tsc/spec", "module": "commonjs", "target": "es5", "baseUrl": "", "types": [ "jasmine", "node" ], "typeRoots": [ "../node_modules/@types" ] }, "files": [ "test.ts" ], "include": [ "**/*.spec.ts" ] }
Node v6.10.3
npm v3.10.10
Please help me.