ng build --prod --watch (void 0) is not a function

[1456118242]

I have this problem too. I have the demo https://github.com/1456118242/angular-watch-demo

Versions

"@angular/common": "^5.2.0",
"@angular/cli": "~1.7.2",

Repro steps

• Step 1 run ng build --watch --prod
• Step 2 Modify the compent file
• Step 3 refresh page
• Step 4 Modify the compent file
• Step 5 refresh page

Observed behavior

![3](https://user-images.githubusercontent.com/18241022/39288390-5a0614da-495a-11e8-919b-4e73e5bd9888.png)
![2](https://user-images.githubusercontent.com/18241022/39288426-7cabfd9c-495a-11e8-9afa-d95d30454c6d.png)

Desired behavior

Mention any other details that might be useful (optional)

[evanlalo]

Same problem.

[alan-agius4]

Hi, Thanks for reporting this issue. I tried to replicate this using the current latest version of the CLI (7.3.0) and I was unable.

Please update to the most recent Angular CLI version. If the problem persists after upgrading, please open a new issue, provide a simple repository reproducing the problem, and describe the difference between the expected and current behavior.

[zosmf-Mira]

my project work well when ng s --prod, but cannot work well and error happen"(void 0) is not a function" when it is used in a websphere project...

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