Chart JS: Old chart data not clearing

Question

I'm trying to update Chart JS data entirely but the old data label on the x-axis not resetting. Is there anything wrong with my code?

    let netProfitData = @this.netProfitData;
    netProfitChart.data.datasets[0].data = netProfitData;

    console.log(netProfitChart.data.datasets);

    netProfitChart.data.datasets[0].backgroundColor = netProfitData.map((value) => 
    value.y > 0 ? fullConfig.theme.colors.green[400] : fullConfig.theme.colors.red[400]);

    netProfitChart.update();

Data array in datasets seems correct to me.

Answer 1

This is because internally chart.js still populates the labels array so you will need to clear that one before replacing your data:

chart.data.labels = [];
chart.data.datasets[0].data = newData;
chart.update();

 const options = { type: 'line', data: { datasets: [{ label: '# of Votes', data: [{ x: 'hi', y: 5 }, { x: 'test', y: 10 }, { x: 'end', y: 2 }], borderColor: 'pink' }] }, options: {} } const ctx = document.getElementById('chartJSContainer').getContext('2d'); const chart = new Chart(ctx, options); chart.data.labels = []; chart.data.datasets[0].data = [{ x: 'k', y: 1 }, { x: 't', y: 4 }, { x: 'a', y: 5 }]; chart.update();

 <body> <canvas id="chartJSContainer" width="600" height="400"></canvas> <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.6.0/chart.js"></script> </body>

Chart JS: Old chart data not clearing

Question

1 answers

solution1
0 2021-11-22 15:47:14

Chart JS: Old chart data not clearing

Question

1 answers

solution1 0 2021-11-22 15:47:14

solution1
0 2021-11-22 15:47:14