To create a fake datapoint in a Chart.js line chart for the current day label, you will need to add a new data point to your chart's data array with a timestamp corresponding to the current day.

Assuming you have already created a line chart using Chart.js and have defined your data array, you can add a new data point using the following steps:

Get the current date as a JavaScript Date object:

Convert the date to a timestamp in the format expected by Chart.js, which is the number of milliseconds since January 1, 1970:

Add a new data point to your data array with the timestamp and a value of your choice:

Note that the x property of the data point should be set to the timestamp, and the y property should be set to the value you want to plot on the chart.

Update your chart's data using the new data array:

This assumes that you have only one dataset in your chart. If you have multiple datasets, you will need to update the data array for each dataset.

Here's a complete example code snippet that demonstrates how to create a fake datapoint in Chart.js line chart for the current day label:

  labels: ['2022-03-22', '2022-03-23', '2022-03-24', '2022-03-25'],

const ctx = document.getElementById('myChart').getContext('2d');

// Add a new datapoint for the current day

data.datasets[0].data.push({x: timestamp, y: 50});

In this example, we have a line chart with four data points representing the values for the past four days. We then add a new data point for the current day with a value of 50. Finally, we update the chart to display the new data point.

Note that the type of the x-axis in the chart is set to 'time' and the time property is used to specify the display format for the x-axis labels. This allows Chart.js to correctly display the date and time values on the x-axis.

In this article, I will create a fake datapoint in Chart.js line chart for the current day label.

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