What are the steps to integrate dynamic data into chartjs?

Question

What are the steps to integrate dynamic data into chartjs?

Can you assist me in understanding how to dynamically populate Chartjs with data from a json file? Specifically, I am looking to dynamically fill the labels and data fields.

Sample JSON File <<<

[
   {
      "EFICAZ_TAB_ITEM_ID":1,
      "EFICAZ_PERCENTS":99
   },
   {
      "EFICAZ_TAB_ITEM_ID":2,
      "EFICAZ_PERCENTS":99
   },
   {
      "EFICAZ_TAB_ITEM_ID":3,
      "EFICAZ_PERCENTS":99
   }
]


CHARTJS Setup <<<

var ctx = document.getElementById('myChart').getContext('2d');
var chart = new Chart(ctx, {
    // The type of chart we want to create
    type: 'line',

    // The data for our dataset
    data: {
        labels: [???],
        datasets: [{
            label: "My First dataset",
            backgroundColor: 'rgb(255, 99, 132)',
            borderColor: 'rgb(255, 99, 132)',
            data: [???],
        }]
    },

    // Configuration options go here
    options: {}
});

javascript json charts chart.js

Answer 1

Answer №1

I utilized the $.ajax() method to retrieve JSON data and store it in two arrays that can be used for labeling and data in a chart. Hopefully, this solution proves helpful for you!

 var labelsArray = [];
    var dataArray = [];

    $.ajax({
      url: "test.json",
      dataType: 'json',
      async: false,
      success: function(data) {
        $.each(data, function(i, field){
             labelsArray.push(field.EFICAZ_TAB_ITEM_ID);
             dataArray.push(field.EFICAZ_PERCENTS);
           });
      }
    });

     $.getJSON("test.json", function(result){
           $.each(result, function(i, field){
             labelsArray.push(field.EFICAZ_TAB_ITEM_ID);
             dataArray.push(field.EFICAZ_PERCENTS);
           });
        });

    var ctx = document.getElementById("myCanvas").getContext('2d');

    var chart = new Chart(ctx, {
        type: 'line',
        data: {
            labels: labelsArray,
            datasets: [{
                label: "My First dataset",
                backgroundColor: 'rgb(255, 99, 132)',
                borderColor: 'rgb(255, 99, 132)',
                data: dataArray,
            }]
        },
        options: {}
    });

Answer 2

I utilized the $.ajax() method to retrieve JSON data and store it in two arrays that can be used for labeling and data in a chart. Hopefully, this solution proves helpful for you!

 var labelsArray = [];
    var dataArray = [];

    $.ajax({
      url: "test.json",
      dataType: 'json',
      async: false,
      success: function(data) {
        $.each(data, function(i, field){
             labelsArray.push(field.EFICAZ_TAB_ITEM_ID);
             dataArray.push(field.EFICAZ_PERCENTS);
           });
      }
    });

     $.getJSON("test.json", function(result){
           $.each(result, function(i, field){
             labelsArray.push(field.EFICAZ_TAB_ITEM_ID);
             dataArray.push(field.EFICAZ_PERCENTS);
           });
        });

    var ctx = document.getElementById("myCanvas").getContext('2d');

    var chart = new Chart(ctx, {
        type: 'line',
        data: {
            labels: labelsArray,
            datasets: [{
                label: "My First dataset",
                backgroundColor: 'rgb(255, 99, 132)',
                borderColor: 'rgb(255, 99, 132)',
                data: dataArray,
            }]
        },
        options: {}
    });

Answer 3

Answer №2

Check out this code snippet for creating a dynamic chart using Chart.js:

document.addEventListener('DOMContentLoaded', function(){
  
    var chartData = [
      {
        "EFICAZ_TAB_ITEM_ID":1,
        "EFICAZ_PERCENTS":21
      },
      {
        "EFICAZ_TAB_ITEM_ID":2,
        "EFICAZ_PERCENTS":55
      },
      {
        "EFICAZ_TAB_ITEM_ID":3,
        "EFICAZ_PERCENTS":32
      }
    ];
    
    var labels = [];
    var values = [];
    chartData.forEach(function(el, key){
      labels.push(el.EFICAZ_TAB_ITEM_ID);
      values.push(el.EFICAZ_PERCENTS);
    });
    
    var ctx = document.getElementById('myChart').getContext('2d');
    var chart = new Chart(ctx, {
        type: 'line',
        data: {
            labels: labels,
            datasets: [{
                label: "My First dataset",
                backgroundColor: 'rgb(255, 99, 132)',
                borderColor: 'rgb(255, 99, 132)',
                data: values,
            }]
        },
        options: {}
    });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.min.js"></script>
<canvas id="myChart" width="400" height="200"></canvas>

Answer 4

Check out this code snippet for creating a dynamic chart using Chart.js:

document.addEventListener('DOMContentLoaded', function(){
  
    var chartData = [
      {
        "EFICAZ_TAB_ITEM_ID":1,
        "EFICAZ_PERCENTS":21
      },
      {
        "EFICAZ_TAB_ITEM_ID":2,
        "EFICAZ_PERCENTS":55
      },
      {
        "EFICAZ_TAB_ITEM_ID":3,
        "EFICAZ_PERCENTS":32
      }
    ];
    
    var labels = [];
    var values = [];
    chartData.forEach(function(el, key){
      labels.push(el.EFICAZ_TAB_ITEM_ID);
      values.push(el.EFICAZ_PERCENTS);
    });
    
    var ctx = document.getElementById('myChart').getContext('2d');
    var chart = new Chart(ctx, {
        type: 'line',
        data: {
            labels: labels,
            datasets: [{
                label: "My First dataset",
                backgroundColor: 'rgb(255, 99, 132)',
                borderColor: 'rgb(255, 99, 132)',
                data: values,
            }]
        },
        options: {}
    });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.min.js"></script>
<canvas id="myChart" width="400" height="200"></canvas>

What are the steps to integrate dynamic data into chartjs?

Answer №1

Answer №2

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