opened
deepak-ranolia
username_0
In angular project
Step 1 : run **_npm install bloom-filters --save_**
Step 2: Add _**"node_modules/bloom-filters/bloom-filters.js"**_ in angular.json
Step 3: Import in component file as _**import * as BloomFilter from 'bloom-filters'**_



my package.json is 
{
  "name": "",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~7.1.0",
    "@angular/cdk": "~7.1.0",
    "@angular/common": "~7.1.0",
    "@angular/compiler": "~7.1.0",
    "@angular/core": "~7.1.0",
    "@angular/forms": "~7.1.0",
    "@angular/platform-browser": "~7.1.0",
    "@angular/platform-browser-dynamic": "~7.1.0",
    "@angular/router": "~7.1.0",
    "@types/axios": "^0.14.0",
    "aes-js": "^3.1.2",
    "angular-filepond": "^1.0.5",
    "bloom-filters": "^0.5.2",
    "chart.js": "^2.7.3",
    "core-js": "^2.5.4",
    "d3": "^5.7.0",
    "datatables.net": "^1.10.19",
    "datatables.net-dt": "^1.10.19",
    "echarts": "^4.2.0-rc.2",
    "js-sha256": "^0.9.0",
    "jssha": "^2.3.1",
    "ng2-charts": "^1.6.0",
    "ng2-pdf-viewer": "^5.2.3",
    "ng2-toastr": "^4.1.2",
    "ngx-echarts": "^4.1.0",
    "ngx-extended-pdf-viewer": "^0.9.14",
    "rxjs": "~6.3.3",
    "tslib": "^1.9.0",
    "zone.js": "~0.8.26"
  },let filter = new BloomFilter(15, 0.01)
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.11.0",
    "@angular/cli": "~7.1.2",
    "@angular/compiler-cli": "~7.1.0",
    "@angular/language-service": "~7.1.0",
    "@schematics/angular": "~7.1.0",
    "@types/echarts": "^4.1.3",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^8.9.5",
    "codelyzer": "~4.5.0",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~3.1.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~3.1.6"
  }
}


**GOT the title error**



**Solution might be
1.** _[](https://webpack.js.org/guides/author-libraries/#expose-the-library)_
2.  how to import node npm module in angular project
ERROR TypeError: "bloom_filters__WEBPACK_IMPORTED_MODULE_2__ is not a constructor"
issue
created
Callidon
username_1
You are not using the package like it should be used. The `bloom-filter` package exposes several data structures. Thus, with `import * as BloomFilter from 'bloom-filters'`, you are importing all of these structures and not the `BloomFilter` one.

Futhermore, this is an issue related to your usage of Webpack, and not to this package.

You should follow the README more closely. The following code should work in your case.
```javascript
// only import the BllomFilter datastructure
import { BloomFilter } from 'bloom-filters'

let filter = new BloomFilter(15, 0.01)

// alternatively, create a Bloom Filter from an array with 1% error rate
filter = BloomFilter.from([ 'alice', 'bob' ], 0.01)

// add some value in the filter
filter.add('alice')
filter.add('bob')

// lookup for some data
console.log(filter.has('bob')) // output: true
console.log(filter.has('daniel')) // output: false

// print false positive rate (around 0.01)
console.log(filter.rate())
```
comment
closed
Callidon
username_1
issue