The error message 'ReferenceError: MouseEvent is not defined' indicates that

Recently, I attempted to incorporate ng2-select into a project that relies on angular/universal-starter (TypeScript 2.x) as its foundation.

(Interestingly, ng2-select worked perfectly fine when added to an angular-cli generated project.)

However, upon adding the following two lines:

import { SELECT_DIRECTIVES } from 'ng2-select/ng2-select';

@Component({
  directives: [SELECT_DIRECTIVES],
  ...

I encountered an error in my terminal right away:

ReferenceError: MouseEvent is not defined
    at /my-project/node_modules/ng2-select/components/select/off-click.js:33:42
    at Object.<anonymous> (/my-project/node_modules/ng2-select/components/select/off-click.js:43:2)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)
    // more similar errors follow
[nodemon] app crashed - waiting for file changes before starting...

Here is a snippet of my tsconfig.json configuration:

{
  "compilerOptions": {
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "target": "es5",
    "module": "commonjs",
    "removeComments": true,
    "sourceMap": true,
    "lib": ["es6", "dom"]
  },
  "include": [
    "node_modules/@types/**/*.d.ts",
    "src/**/*.ts"
  ],
  "exclude": [
    "node_modules",
    "!node_modules/@types/**/*.d.ts"
  ],
  "compileOnSave": false,
  "buildOnSave": false,
  "atom": {
    "rewriteTsconfig": false
  }
}

Answer №1

It seems like the issue occurred due to the directive not loading correctly.

1) Ensure that the correct Components are being imported and verify if the MouseEvent is defined.

2) Check if all the components are properly exported;

3) Within

@Component({
  directives: [SELECT_DIRECTIVES],
  ...

make certain that SELECT_DIRECTIVES is not an array object. If it is, consider trying

[ ...SELECT_DIRECTIVES ]

Answer №2

The reason can be found at this link.

Kindly keep an eye on this matter.

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