After deploying to Heroku, cal-heatmap encounters errors despite functioning correctly in a local environment

I successfully implemented a cal-heatmap instance in my Angular 2 (angular-cli) project locally, but when I deployed the project to Heroku, I encountered some errors that prevent the cal-heatmap from displaying.

https://i.stack.imgur.com/8gY90.png

The error seems to point to a specific line within the cal-heatmap.js file:

getDayOfYear: d3.time.format("%j"),

Although I have ensured that both d3.js and cal-heatmap.js are correctly referenced in my project, the issue persists.

Could this be related to typings? I attempted to address this by adding the following dependencies to my package.json file without success:

  • "@types/d3": "~4.4.1"
  • "@types/cal-heatmap": "~3.5.31"

Any suggestions on how to resolve this and get cal-heatmap working on my Heroku deployment?

UPDATE After realizing I was using the latest version of d3.js, I switched to the recommended version (v3.5.6) mentioned on . However, new errors have appeared:

https://i.stack.imgur.com/D2cYQ.png

I'm still unsure about the necessary steps to rectify this issue.

angularherokutypescriptangular-clical-heatmap

Answer №1

Resolved the issue by identifying that the error occurred because the #cal-heatmap div was not able to be located. This happened when I added a *ngIf condition to the #cal-heatmap div in order to show a loading spinner while the cal-heatmap was being loaded. Removing the *ngIf condition resolved the problem as it allowed the cal-heatmap to load and display properly.

In addition, I discovered that the initial issue was related to referencing a newer version of d3.js, so I ensured that I also referenced v3.5.6.

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