javascript - Cannot read property 'kind' of undefined - Stack Overflow

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run the my project

ng build --prod --base-href="./"

getting below error message

ERROR in ./node_modules/ng-multiselect-dropdown/fesm2015/ng-multiselect-dropdown.js
Module build failed (from ./node_modules/@angular-devkit/build-optimizer/src/build-optimizer/webpack-loader.js):
TypeError: Cannot read property 'kind' of undefined
    at isAngularDecoratorMetadataExpression (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:265:35)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:77:21)
    at visitNodes (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16514:30)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16740:24)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16635:21)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16703:24)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16692:24)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16599:21)

run the my project

ng build --prod --base-href="./"

getting below error message

ERROR in ./node_modules/ng-multiselect-dropdown/fesm2015/ng-multiselect-dropdown.js
Module build failed (from ./node_modules/@angular-devkit/build-optimizer/src/build-optimizer/webpack-loader.js):
TypeError: Cannot read property 'kind' of undefined
    at isAngularDecoratorMetadataExpression (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:265:35)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:77:21)
    at visitNodes (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16514:30)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16740:24)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16635:21)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16703:24)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16692:24)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16599:21)

• javascript
• angular

Share Improve this question Follow edited Nov 4, 2019 at 13:52 daan.desmedt 3,82011 gold badge2121 silver badges3333 bronze badges asked Nov 4, 2019 at 13:51 gayathri bindelagayathri bindela 5911 gold badge22 silver badges55 bronze badges 3

• 2 Does this answer your question? TypeError: Cannot read property 'kind' of undefined at getAssignmentTargetKind – Prashant Pimpale Commented Nov 4, 2019 at 13:53
• do you solve this problem. I m having the same issue, when i m trying to build newly created library – Shameera Anuranga Commented Dec 2, 2019 at 10:07
• Does this answer your question? Cannot read property 'kind' of undefined while publish angular+ core project in CI-CD azure devops – Leponzo Commented Aug 23, 2022 at 19:53

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4 Answers 4

Sorted by: Reset to default 7

Not a permanent solution, but I was getting this in production only with datepicker. I went to the production configuration in angular.json and changed buildOptimizer to false.

I found it really hard to find information about this error for library builders, so I'm posting it here. We can't just tell the users to upgrade their Angular's versions or disable build optimization.

For a library to work well with versions 6 and 7 of @angular/cli, you must export all decorators metadata when building the library. To do that, add the following to the tsconfig.json of your lib:

"pilerOptions": {
  "emitDecoratorMetadata": true
}

Downgrading the version of ng-multiselect-dropdown to 0.2.3 might solve the issue.

Just remove the caret ^ symbol from the package i.e.

"ng-multiselect-dropdown": "^0.2.3" to "ng-multiselect-dropdown": "0.2.3"

Resolved my issue.

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