I'm using karma-typescript, with this karma config file :
karmaTypescriptConfig: {
compilerOptions: {
target: "es5",
lib: ["dom", "es2015", "es2017"]
},
bundlerOptions: {
transforms: [require("karma-typescript-es6-transform")()]
}
},
In my spec files, I have this code :
import {} from './local/lib.js'
In my lib.js, I have this code :
async function() {}
When executing my tests with npm test
, I have this error :
ERROR [source-reader.karma-typescript] Error parsing code: Unexpected token (X:Y) in /local/lib.js
If I remove the async
keyword, everything is alright.
How can I edit my karma config file to fix the error ?
According to an issue in the Github of the karma-typescript
package (https://github.com/monounity/karma-typescript/issues/344), there is an undocumented flag which may help you test code which contains ES2017 code:
karmaTypescriptConfig: {
compilerOptions: {
target: "es5",
lib: ["dom", "es2015", "es2017"]
},
bundlerOptions: {
acornOptions: {
ecmaVersion: 8,
},
transforms: [require("karma-typescript-es6-transform")()]
}
},
This flag made appear our issues with the async
keyword. However, there is still an issue with the spread syntax (...array
) in our code, even using this flag. If anyone knows an answer how to also fix that, I will happily extend my answer.
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