scroll issue in chrome angular 5

Question

I'm new in angular 5 and I'm developing a web app with it. The App works fine in Firefox but in Chrome, I get the following error:

zone.js:1666 [Violation] Added non-passive event listener to a scroll-blocking 'mousewheel' event. Consider marking event handler as 'passive' to make the page more responsive ˋ

Package.json:

{
  "name": "app",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build --prod",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^5.2.10",
    "@angular/cdk": "^5.2.5",
    "@angular/common": "^5.2.0",
    "@angular/compiler": "^5.2.0",
    "@angular/core": "^5.2.0",
    "@angular/forms": "^5.2.0",
    "@angular/http": "^5.2.0",
    "@angular/material": "^5.2.5",
    "@angular/platform-browser": "^5.2.0",
    "@angular/platform-browser-dynamic": "^5.2.0",
    "@angular/router": "^5.2.0",
    "alertify.js": "^1.0.12",
    "core-js": "^2.4.1",
    "crypto-js": "^3.1.9-1",
    "jquery": "^3.3.1",
    "ng4-geoautocomplete": "^0.1.0",
    "ngx-cookie-service": "^1.0.10",
    "ngx-filter-pipe": "^2.1.0",
    "rxjs": "^5.5.6",
    "socket.io-client": "^2.1.0",
    "ts-md5": "^1.2.4",
    "zone.js": "^0.8.19"
  },
  "devDependencies": {
    "@angular/cli": "~1.7.4",
    "@angular/compiler-cli": "^5.2.0",
    "@angular/language-service": "^5.2.0",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "^6.0.108",
    "@types/socket.io-client": "^1.4.32",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "~2.5.3"
  }
}ˋ

Have you added any event listeners to a mousewheel event? Or are you manipulating the scroll event anywhere in your app? If so please show that code — Michael Doye, May 09 '18 at 13:50
@Und3rTow I have tried this solution but does not work for me: `document.addEventListener("wheel", function(e) { e.preventDefault(); }, { passive: true });` — Foram Jhaveri, May 10 '18 at 04:55
May be this answer will do the trick [click here](https://stackoverflow.com/a/46542547/5173327). — chocha ashish, May 23 '18 at 07:12

score 0 · Answer 1 · answered May 23 '18 at 08:19

I was getting this error because I have included smoothscroll.js in my angular-cli.json which contains this code affecting mouse scroll event in chrome:

var ischrome = /chrome/.test(navigator.userAgent.toLowerCase());
if (ischrome) {
  ssc_addEvent("mousedown", ssc_mousedown);
  ssc_addEvent("mousewheel", ssc_wheel);
  ssc_addEvent("load", ssc_init)
}

after removing it, my app works perfectly fine.

scroll issue in chrome angular 5

1 Answers1