Netflix / Netflix/x-element

Error: Property "MyElement.properties.id" is computed

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Dominant language
JavaScript
Stars
43
Forks
20
PR merge metrics
No merged PRs in 30d

Description

I could not remember if id is an allowed reflected attribute binding — so I gave it a try and got an error message that was a bit confusing:

id: {
  type: String,
  reflect: true,
  input: ['data'],
  compute: this.#computeId,
},

Results in error message:

Uncaught Error: Property "MyElement.properties.id" is computed (computed properties are read-only).

Is this expected?

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the issue's MyElement property definition with id, reflect, input, and compute enabled. Trace the validation that emits the computed-property error and check nearby tests or documentation for computed and reflected properties; done means the behavior is confirmed as expected or the error guidance is made accurate.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
frontend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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