JS Chart.js

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JS Chart.js

Chart.js is a free JavaScript library for creating HTML-based charts. It is one of the simplest visualization libraries for JavaScript, and comes with the following built-in chart types:

How to Use Chart.js?

Chart.js can be easily used.

Add a link to the providing CDN (Content Delivery Network):

<script src=”https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.js”></script>

Add a <canvas> to where the chart needs to be drawn:

<canvas id=”myChart” style=”width:100%;max-width:700px”></canvas>

The canvas element should have a unique id.

Typical Scatter Chart Syntax

var myChart = new Chart(“myChart”, {

  type: “scatter”,

  data: {},

  options: {}

});

Typical Line Chart Syntax

var myChart = new Chart(“myChart”, {

  type: “line”,

  data: {},

  options: {}

});

Typical Bar Chart Syntax

var myChart = new Chart(“myChart”, {

  type: “bar”,

  data: {},

  options: {}

});

Scatter Plots

<!DOCTYPE html>

<html>

<script src=”https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.js”></script>

<body>

<canvas id=”myChart” style=”width:100%;max-width:700px”></canvas>

<script>

var xyValues = [

  {x:50, y:7},

  {x:60, y:8},

  {x:70, y:8},

  {x:80, y:9},

  {x:90, y:9},

  {x:100, y:9},

  {x:110, y:10},

  {x:120, y:11},

  {x:130, y:14},

  {x:140, y:14},

  {x:150, y:15}

];

new Chart(“myChart”, {

  type: “scatter”,

  data: {

    datasets: [{

      pointRadius: 4,

      pointBackgroundColor: “rgb(0,0,255)”,

      data: xyValues

    }]

  },

  options: {

    legend: {display: false},

    scales: {

      xAxes: [{ticks: {min: 40, max:160}}],

      yAxes: [{ticks: {min: 6, max:16}}],

    }

  }

});

</script>

</body>

</html>

Output

scaller plots chart

Line Graphs

Example

<!DOCTYPE html>

<html>

<script src=”https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.js”></script>

<body>

<canvas id=”myChart” style=”width:100%;max-width:600px”></canvas>

<script>

var xValues = [50,60,70,80,90,100,110,120,130,140,150];

var yValues = [7,8,8,9,9,9,10,11,14,14,15];

new Chart(“myChart”, {

  type: “line”,

  data: {

    labels: xValues,

    datasets: [{

      fill: false,

      lineTension: 0,

      backgroundColor: “rgba(0,0,255,1.0)”,

      borderColor: “rgba(0,0,255,0.1)”,

      data: yValues

    }]

  },

  options: {

    legend: {display: false},

    scales: {

      yAxes: [{ticks: {min: 6, max:16}}],

    }

  }

});

</script>

</body>

</html>

Output

line graph chart js

Multiple Lines

Example

<!DOCTYPE html>

<html>

<script src=”https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js”></script>

<body>

<canvas id=”myChart” style=”width:100%;max-width:600px”></canvas>

<script>

var xValues = [100,200,300,400,500,600,700,800,900,1000];

new Chart(“myChart”, {

  type: “line”,

  data: {

    labels: xValues,

    datasets: [{

      data: [860,1140,1060,1060,1070,1110,1330,2210,7830,2478],

      borderColor: “red”,

      fill: false

    }, {

      data: [1600,1700,1700,1900,2000,2700,4000,5000,6000,7000],

      borderColor: “green”,

      fill: false

    }, {

      data: [300,700,2000,5000,6000,4000,2000,1000,200,100],

      borderColor: “blue”,

      fill: false

    }]

  },

  options: {

    legend: {display: false}

  }

});

</script>

Output

multiple line chart js

Bar Charts

Example

<!DOCTYPE html>

<html>

<script src=”https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js”></script>

<body>

<canvas id=”myChart” style=”width:100%;max-width:600px”></canvas>

<script>

var xValues = [“Italy”, “France”, “Spain”, “USA”, “Argentina”];

var yValues = [55, 49, 44, 24, 15];

var barColors = [“red”, “green”,”blue”,”orange”,”brown”];

new Chart(“myChart”, {

  type: “bar”,

  data: {

    labels: xValues,

    datasets: [{

      backgroundColor: barColors,

      data: yValues

    }]

  },

  options: {

    legend: {display: false},

    title: {

      display: true,

      text: “World Wine Production 2018”

    }

  }

});

</script>

</body>

</html>

Output

bar chart js

Horizontal Bars

Example

<!DOCTYPE html>

<html>

<script src=”https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js”></script>

<body>

<canvas id=”myChart” style=”width:100%;max-width:600px”></canvas>

<script>

var xValues = [“Italy”, “France”, “Spain”, “USA”, “Argentina”];

var yValues = [55, 49, 44, 24, 15];

var barColors = [“red”, “green”,”blue”,”orange”,”brown”];

new Chart(“myChart”, {

  type: “horizontalBar”,

  data: {

  labels: xValues,

  datasets: [{

    backgroundColor: barColors,

    data: yValues

  }]

},

  options: {

    legend: {display: false},

    title: {

      display: true,

      text: “World Wine Production 2018”

    },

    scales: {

      xAxes: [{ticks: {min: 10, max:60}}]

    }

  }

});

</script>

</body>

</html>

Output

horizontal bar chart

Pie Charts

Example

<!DOCTYPE html>

<html>

<script src=”https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.js”></script>

<body>

<canvas id=”myChart” style=”width:100%;max-width:600px”></canvas>

<script>

var xValues = [“Italy”, “France”, “Spain”, “USA”, “Argentina”];

var yValues = [55, 49, 44, 24, 15];

var barColors = [

  “#b91d47”,

  “#00aba9”,

  “#2b5797”,

  “#e8c3b9”,

  “#1e7145”

];

new Chart(“myChart”, {

  type: “pie”,

  data: {

    labels: xValues,

    datasets: [{

      backgroundColor: barColors,

      data: yValues

    }]

  },

  options: {

    title: {

      display: true,

      text: “World Wide Wine Production 2018”

    }

  }

});

</script>

</body>

</html>

Output

pie chart js

Doughnut Charts

Example

<!DOCTYPE html>

<html>

<script src=”https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.js”></script>

<body>

<canvas id=”myChart” style=”width:100%;max-width:600px”></canvas>

<script>

var xValues = [“Italy”, “France”, “Spain”, “USA”, “Argentina”];

var yValues = [55, 49, 44, 24, 15];

var barColors = [

  “#b91d47”,

  “#00aba9”,

  “#2b5797”,

  “#e8c3b9”,

  “#1e7145”

];

new Chart(“myChart”, {

  type: “doughnut”,

  data: {

    labels: xValues,

    datasets: [{

      backgroundColor: barColors,

      data: yValues

    }]

  },

  options: {

    title: {

      display: true,

      text: “World Wide Wine Production 2018”

    }

  }

});

</script>

</body>

</html>

Output

Doughnut chart js

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