Solvedvue chartjs [Vue warn]: Invalid prop: type check failed for prop "chartData"

Expected Behavior

Absence of warning )

Possible answer

Can't understand the reason it's present. But after changing in
props: ['chartData', 'options'], to props: ['options'], warn goes away.
I thought it's already added in mixin. What's wrong?

Update: Oh, due adding chartData it seems i'm overriding mixins validation.
The root of evil is that the nested component renders firstly when props still null. After changing mounted hook to created in RandomChart.vue warn is gone.

Actual Behavior

[Vue warn]: Invalid prop: type check failed for prop "chartData". Expected Object, got Null 

found in

---> <RateChart> at app/javascript/RateChart.vue
       <RatePage> at app/javascript/RatePage.vue

in vue.runtime.esm.js:640


  • vue.js version: 2.6.10
  • vue-chart.js version: 3.4.2
13 Answers

✔️Accepted Answer

Oh now I understand.

Well. the issue is that the prop is defined as an object in the mixin. And has a default value of an empty object:

You are however passing null to it. Because you define

datacollection: null

if you change that to datacollection: {} the warning will go away.

Other Answers:

I tried both datacollection:null and datacollection:{}, both never really worked for me. Try
datacollection:{ labels:[], datasets: [] }

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