The functionality of d3 transition is currently non-existent

I've encountered an issue with my D3 code.

const hexagon = this.hexagonSVG.append('path')
  .attr('id', 'active')
  .attr('d', lineGenerator(<any>hexagonData))
  .attr('stroke', 'url(#gradient)')
  .attr('stroke-width', 3.5)
  .attr('fill', 'none')

const totalLength = (<any>hexagon).node().getTotalLength()

const _transition = this.d3.transition()
  .duration(DASH_ANIMATION)
  .ease(this.d3.easeLinear)

hexagon
  .attr('stroke-dasharray', totalLength + ' ' + totalLength)
  .attr('stroke-dashoffset', totalLength)
  .attr('stroke-dashoffset', 0)
  .transition(_transition)

This code had been running smoothly for around 6 months, but today an unexpected error popped up.

"hexagon.attr(...).attr(...).attr(...).transition is not a function"

If anyone could provide guidance on how to resolve this issue, I would greatly appreciate it. Thank you.

typescriptd3.js

Answer №1

Just wanted to share my experience: I encountered a similar issue that seemed to stem from conflicts between webpack, yarn, and d3-transition. The problem lies in the extension of d3-selection by d3-transition, leading to multiple versions of d3-selection appearing in the yarn.lock file (as detailed in this thread).

In my situation, explicitly specifying d3-selection, deleting the lock file, and then running yarn install again resolved the issue.

It appears that each update to d3-transition brings back this same issue.

Answer №2

During my coding experience, I faced a situation where I was utilizing both import * as d3 from 'd3'; and individual 

import { select } from 'd3-selection'
. To resolve this issue, I opted to only use individual imports, which I believe is the recommended practice.

Answer №3

Just wanted to share a solution I found for an old issue regarding 

<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="bfdb8cff8b918e8c918f">[email protected]</a>
. By adding the following code to your package.json:

"resolutions": {
    "d3-selection": "1.3.0"
}

Then deleting your yarn.lock file and running yarn install can help yarn manage version resolutions effectively.

Just to note, my d3 dependencies in package.json don't include d3-selection as a direct dependency:

    ...
    "d3": "4.13.0",
    "d3-geo-projection": "2.9.0",
    "d3-scale": "1.0.0",
    "d3-scale-chromatic": "3.0.0",
    ...

This issue seems to be related to how yarn handles dependency resolution, as switching temporarily to npm didn't cause any problems. Check out this thread on Github for other possible solutions: https://github.com/d3/d3-selection/issues/185

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