Object doesn't support property or method 'slice'

[...new Set(properties)]

gets to

new Set(l).slice()

in ES5 bundle, which fails in browser, because Set has no slice() method.

Tested in Internet Explorer 11.1069.17134.0.

Used packages:

"dependencies": { "@angular/animations": "^8.2.14", "@angular/cdk": "^8.2.3", "@angular/common": "^8.2.14", "@angular/compiler": "^8.2.14", "@angular/core": "^8.2.14", "@angular/forms": "^8.2.14", "@angular/platform-browser": "^8.2.14", "@angular/platform-browser-dynamic": "^8.2.14", "@angular/router": "^8.2.14", "@ngx-translate/core": "^11.0.1", "@ngx-translate/http-loader": "^4.0.0", "angular-draggable-droppable": "^4.3.8", "array-sort": "^1.0.0", "core-js": "^2.5.7", "lodash": "^4.17.15", "moment": "^2.24.0", "moment-timezone": "^0.5.27", "ngx-cookie-service": "^2.2.0", "primeflex": "^1.0.0", "primeicons": "2.0.0", "primeng": "8.1.1", "rxjs": "^6.5.3", "ts-odata": "0.3.0", "web-animations-js": "^2.3.2", "zone.js": "~0.9.1" }, "devDependencies": { "@angular-devkit/build-angular": "^0.803.19", "@angular/cli": "^8.3.19", "@angular/compiler-cli": "^8.2.14", "@angular/language-service": "^8.2.14", "@fortawesome/fontawesome-free": "^5.11.2", "@types/array-sort": "^1.0.0", "@types/jasmine": "~3.3.8", "@types/jasminewd2": "^2.0.8", "@types/lodash": "^4.14.149", "@types/moment-timezone": "^0.5.12", "@types/node": "~8.9.5", "codelyzer": "^5.1.2", "jasmine-core": "~3.4.0", "jasmine-spec-reporter": "~4.2.1", "karma": "~4.1.0", "karma-chrome-launcher": "~2.2.0", "karma-coverage-istanbul-reporter": "~2.0.1", "karma-jasmine": "~2.0.1", "karma-jasmine-html-reporter": "^1.4.0", "protractor": "^5.4.2", "selenium-webdriver": "^4.0.0-alpha.5", "ts-node": "~7.0.1", "tslint": "~5.20.1", "tslint-eslint-rules": "^5.4.0", "typescript": "~3.5.3", "webpack-bundle-analyzer": "^3.6.0" }

[h3llbring0r]

Solved. Source of the problem was dev dependency @angular-devkit/build-angular with version 0.803.19. Changed version to 0.803.20 and now the ES5 bundle is generated with __spread(new Set(l)).

[MrJithil]

Set doesn’t have 'slice` methods. Please refer MDN for the documentation.