An issue has been detected by Zone.js where the ZoneAwarePromise `(window|global).Promise` has been unexpectedly replaced

Question

An issue has been detected by Zone.js where the ZoneAwarePromise `(window|global).Promise` has been unexpectedly replaced

I have recently integrated the Angular2 quickstart code into my existing webpack setup, but I seem to be facing an issue where something is interfering with the promise from zone.js, resulting in an error. Based on my research on Stack Overflow, it appears that the zone.js file should be loaded after any files that might contain promises.

My assumption is that the HTML with the <src> tag pointing to the zone.js file is being loaded before webpack finishes loading other files in the node_module directory.

Does anyone have any suggestions or ideas on how to resolve this?

Here is the content of my current package.json:

{
  "name": "site-pinger",
  "version": "1.0.0",
  ...

Below is the configuration from my webpack.config.js:

'use strict'
...

In my index.html file, I've manually included the zone.js file to prevent any potential conflicts:

<!doctype html>
...

javascript angular typescript webpack

Answer 1

Answer №1

After updating my zone.js package to the newest version using the command

npm install zone.js@latest --save

, everything started working properly for me.

Answer 2

After updating my zone.js package to the newest version using the command

npm install zone.js@latest --save

, everything started working properly for me.

Answer 3

Answer №2

Encountered a similar issue while loading core-js and zone.js. I found that rearranging the import statements, putting zone.js after core-js, solved the problem for me.

Original arrangement:

import 'zone.js/dist/zone';
import 'core-js';

New arrangement:

import 'core-js';
import 'zone.js/dist/zone';

In regard to your webpack problem, @estus mentioned that adding the systemjs import is unnecessary since it will be included in the generated dist/* files by webpack (which are not present in your index.html).

Here is an example of how my index.html looks after running webpack on my project:

<html>
  <head>
    <!-- Some CSS links here -->
  </head>
  <body>
    <my-app>
    </my-app>

    <script src="dist/vendor.bundle.min.js"></script>
    <script src="dist/app.bundle.min.js"></script>
  </body>
</html>

I hope this information proves useful for you.

Answer 4

Encountered a similar issue while loading core-js and zone.js. I found that rearranging the import statements, putting zone.js after core-js, solved the problem for me.

Original arrangement:

import 'zone.js/dist/zone';
import 'core-js';

New arrangement:

import 'core-js';
import 'zone.js/dist/zone';

In regard to your webpack problem, @estus mentioned that adding the systemjs import is unnecessary since it will be included in the generated dist/* files by webpack (which are not present in your index.html).

Here is an example of how my index.html looks after running webpack on my project:

<html>
  <head>
    <!-- Some CSS links here -->
  </head>
  <body>
    <my-app>
    </my-app>

    <script src="dist/vendor.bundle.min.js"></script>
    <script src="dist/app.bundle.min.js"></script>
  </body>
</html>

I hope this information proves useful for you.

Answer 5

Answer №3

I encountered a similar problem. I found that the import 'zone.js/dist/zone'; was causing issues in polyfill.ts. By moving it to main.ts, I was able to resolve the issue successfully

Answer 6

I encountered a similar problem. I found that the import 'zone.js/dist/zone'; was causing issues in polyfill.ts. By moving it to main.ts, I was able to resolve the issue successfully

Answer 7

Answer №4

Encountered a similar issue with older versions of Safari such as 10.3. In my case, the problem was caused by a missing entry in the browserslist file.

ios_saf >= 10
Safari >= 10

source

Answer 8

Encountered a similar issue with older versions of Safari such as 10.3. In my case, the problem was caused by a missing entry in the browserslist file.

ios_saf >= 10
Safari >= 10

source

Answer 9

Answer №5

SebraGra's response is accurate. Nevertheless, when incorporating Angular into an asp.net website, specifically version 4.5.2 in my scenario, the error disappears by placing the scripts after the app-root tag. It's crucial to target either es2015 or es5 output in the dist folder

Thus far, I have not discovered a method to dynamically switch between them

    @{
        Layout = null;
    }

    <!DOCTYPE html>
    <html>
    <head>
        <meta name="viewport" content="width=device-width" />
        <title></title>
        <base href="/">
    </head>
    <body>
        <app-root></app-root>
        @Scripts.Render("~/Scripts/App-es5")
    </body>
    </html>

    public class AngularBundleConfig
    {
        public static void RegisterBundles(BundleCollection bundles)
        {
            bundles.Add(new ScriptBundle("~/Scripts/App-es2015")
                .Include(
                    "~/App/dist/App/scripts-es2015*",
                    "~/App/dist/App/vendor-es2015*",
                    "~/App/dist/App/polyfills-es2015*",
                    "~/App/dist/App/runtime-es2015*",
                    "~/App/dist/App/main-es2015*"
                    ));

            bundles.Add(new ScriptBundle("~/Scripts/App-es5")
                .Include(
                    "~/App/dist/App/scripts-es5*",
                    "~/App/dist/App/vendor-es5*",
                    "~/App/dist/App/polyfills-es5*",
                    "~/App/dist/App/runtime-es5*",
                    "~/App/dist/App/main-es5*"
                ));
        }
    }

Update

I have devised a technique to switch dynamically by replacing the script tag, enabling you to cater for both:

@Scripts.RenderFormat("<script type=\"module\" src=\"{0}\"></script>", "~/Scripts/App-es2015")
@Scripts.RenderFormat("<script src=\"{0}\" nomodule defer></script>", "~/Scripts/App-es5")

Answer 10

SebraGra's response is accurate. Nevertheless, when incorporating Angular into an asp.net website, specifically version 4.5.2 in my scenario, the error disappears by placing the scripts after the app-root tag. It's crucial to target either es2015 or es5 output in the dist folder

Thus far, I have not discovered a method to dynamically switch between them

    @{
        Layout = null;
    }

    <!DOCTYPE html>
    <html>
    <head>
        <meta name="viewport" content="width=device-width" />
        <title></title>
        <base href="/">
    </head>
    <body>
        <app-root></app-root>
        @Scripts.Render("~/Scripts/App-es5")
    </body>
    </html>

    public class AngularBundleConfig
    {
        public static void RegisterBundles(BundleCollection bundles)
        {
            bundles.Add(new ScriptBundle("~/Scripts/App-es2015")
                .Include(
                    "~/App/dist/App/scripts-es2015*",
                    "~/App/dist/App/vendor-es2015*",
                    "~/App/dist/App/polyfills-es2015*",
                    "~/App/dist/App/runtime-es2015*",
                    "~/App/dist/App/main-es2015*"
                    ));

            bundles.Add(new ScriptBundle("~/Scripts/App-es5")
                .Include(
                    "~/App/dist/App/scripts-es5*",
                    "~/App/dist/App/vendor-es5*",
                    "~/App/dist/App/polyfills-es5*",
                    "~/App/dist/App/runtime-es5*",
                    "~/App/dist/App/main-es5*"
                ));
        }
    }

Update

I have devised a technique to switch dynamically by replacing the script tag, enabling you to cater for both:

@Scripts.RenderFormat("<script type=\"module\" src=\"{0}\"></script>", "~/Scripts/App-es2015")
@Scripts.RenderFormat("<script src=\"{0}\" nomodule defer></script>", "~/Scripts/App-es5")

Answer 11

Answer №6

Hey there! To improve your code's performance, try relocating the import 'zone.js/dist/zone'; from polyfill.ts to main.ts.

Don't forget to clear your browser cache before testing for any changes to take effect!

Answer 12

Hey there! To improve your code's performance, try relocating the import 'zone.js/dist/zone'; from polyfill.ts to main.ts.

Don't forget to clear your browser cache before testing for any changes to take effect!

An issue has been detected by Zone.js where the ZoneAwarePromise `(window|global).Promise` has been unexpectedly replaced

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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