How to Update Chart.js Data in Vue.js on Button Click

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The Problem

The Initial Setup

Here's what we started with:

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Report Component

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Your data method initializes data, options, and sets chart labels in the created lifecycle hook:

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The challenge is that the method that updates the labels (submitData) does not seem to reflect the changes on the chart.

The Solution

To successfully achieve the desired dynamic update on chart data when the button is clicked, we need to take an important step: re-render the chart when the data changes. Here’s how to do that:

Modifications

Update the <chartjs-component-line-chart> to utilize a v-if condition to control its rendering:

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Add a loaded Data Property: This boolean property will help manage when to render the chart:

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Update the created and submitData Methods:

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Final Notes

Conclusion

If you have any questions, don’t hesitate to ask in the comments below.