Mastering Vue Chart Js: A Step-by-Step Guide to Hiding Numbers on Your Charts

Prerequisites

Before we begin, make sure you have the following installed:

• Vue Js (version 2 or higher)
• Vue Chart Js (version 2 or higher)
• A basic understanding of Vue Js and Chart Js

Step 1: Create a Basic Chart

Let’s start with a basic line chart using Vue Chart Js. Create a new Vue component and add the following code:

<template>
  <div>
    <chart :chart-data="chartData" :options="chartOptions"></chart>
  </div>
</template>

<script>
export default {
  data() {
    return {
      chartData: {
        labels: ['January', 'February', 'March', 'April', 'May'],
        datasets: [{
          label: 'Sales',
          data: [10, 20, 30, 40, 50],
          backgroundColor: 'rgba(255, 99, 132, 0.2)',
          borderColor: 'rgba(255, 99, 132, 1)',
          borderWidth: 1
        }]
      },
      chartOptions: {
        title: {
          display: true,
          text: 'Sales by Month'
        },
        scales: {
          yAxes: [{
            ticks: {
              beginAtZero: true
            }
          }]
        }
      }
    }
  }
}
</script>

This code creates a basic line chart with a single dataset and labels on the x-axis. You can customize the chart data and options to suit your needs.

Step 2: Hide the Numbers

Now that we have our basic chart, let’s hide the numbers on the y-axis. We can do this by adding a custom callback function to the `ticks` option in the chart options:

chartOptions: {
  title: {
    display: true,
    text: 'Sales by Month'
  },
  scales: {
    yAxes: [{
      ticks: {
        beginAtZero: true,
        callback: function(value) {
          return '';
        }
      }
    }]
  }
}

In this code, we’ve added a `callback` function that returns an empty string (`”`) for each tick value. This effectively hides the numbers on the y-axis.

Customizing the Hidden Numbers

But what if you want to hide only certain numbers, or display them in a specific format? You can customize the callback function to suit your needs. For example, to hide numbers above a certain threshold (e.g., 30), you can use the following code:

chartOptions: {
  title: {
    display: true,
    text: 'Sales by Month'
  },
  scales: {
    yAxes: [{
      ticks: {
        beginAtZero: true,
        callback: function(value) {
          if (value > 30) {
            return '';
          } else {
            return value;
          }
        }
      }
    }]
  }
}

In this code, we’ve modified the callback function to return an empty string (`”`) for values above 30, and the original value for values below or equal to 30.

Common Issues and Solutions

When hiding numbers on your chart, you may encounter some common issues. Here are a few solutions to help you troubleshoot:

Conclusion

And there you have it! With these simple steps, you’ve successfully hidden numbers on your Vue Chart Js chart. Remember to customize the callback function to suit your specific needs, and don’t hesitate to reach out if you encounter any issues.

By hiding numbers on your charts, you can create more visually appealing and easy-to-understand data visualizations that tell a story. Happy charting!

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