How to change the onClick function of C3 load function

Question

I am trying to update a C3 graph with different onclick funtion by using the load function of C3.

The code snippet is here:

var json1 = [{
            date: '2014-01-01',
            upload: 200,
            download: 200,
            total: 400
        }, {
            date: '2014-01-02',
            upload: 100,
            download: 300,
            total: 400
        }, {
            date: '2014-02-01',
            upload: 300,
            download: 200,
            total: 500
        }, {
            date: '2014-02-02',
            upload: 400,
            download: 100,
            total: 500
        }];
        
        var json2 = [{
            date: '2014-01-01',
            upload: 200,
            download: 500,
            total: 700
        }, {
            date: '2014-01-02',
            upload: 500,
            download: 450,
            total: 950
        }, {
            date: '2014-02-01',
            upload: 200,
            download: 800,
            total: 1000
        }, {
            date: '2014-02-02',
            upload: 300,
            download: 500,
            total: 800
        }];
        
var chart = c3.generate({
   bindto: '#div1',  
  data: {
        json: json1,
        onclick: function (event) {
         console.log("11111111111") ;               
    },
        keys: {
            x: 'date',
            value: ['upload', 'download']
        }
    },
    axis: {
        x: {
            type: 'timeseries',
            tick: {
                format: function (x) {
                    if (x.getDate() === 1) {
                        return x.toLocaleDateString();
                    }
                }
            }
        }
    }
});

setTimeout(function () {
    chart.unload();
}, 1000);

setTimeout(function () {
    chart.load({
                json: json2,
                keys: {
                    x: 'date',
                    value: ['upload', 'download']
                },
                onclick: function (event) {
              console.log("22222222") ;               
                },
            });
}, 1000);

<link href="https://rawgit.com/masayuki0812/c3/master/c3.css" rel="stylesheet"/>
<script src="https://rawgit.com/masayuki0812/c3/master/c3.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.10/d3.min.js"></script>
<div id="div1"></div>

Please tell me a way so to update the onClick funtion on the load function itself.

What do you mean by `different onclick function` , also what you want to do `onclick` — curiousguy, Jun 16 '16 at 14:00
@curiousguy By this means try to run different Event on onclick. As you can see in the example above I want to change the implementation of onclick on load function of C3 by calling different console.log. I hope you get the idea. — Raichu, Jun 16 '16 at 14:05

Dan Delaney · Accepted Answer · 2016-06-16T22:00:52.053

From what I can find, c3.load() does not offer all the elements of c3.generate(), therefore you have 2 ways of doing this.

Reuse c3.generate(), or hand off the click event to a variable that you can change, such as:

// INITIAL CLICK HANDLER
var clickhandler = function(event) {
         console.log("11111111111");
}

var json1 = [{
        date: '2014-01-01',
        upload: 200,
        download: 200,
        total: 400
    }, {
        date: '2014-01-02',
        upload: 100,
        download: 300,
        total: 400
    }, {
        date: '2014-02-01',
        upload: 300,
        download: 200,
        total: 500
    }, {
        date: '2014-02-02',
        upload: 400,
        download: 100,
        total: 500
    }];
    
    var json2 = [{
        date: '2014-01-01',
        upload: 200,
        download: 500,
        total: 700
    }, {
        date: '2014-01-02',
        upload: 500,
        download: 450,
        total: 950
    }, {
        date: '2014-02-01',
        upload: 200,
        download: 800,
        total: 1000
    }, {
        date: '2014-02-02',
        upload: 300,
        download: 500,
        total: 800
    }];

// GENERATE CHART FROM JSON1            
var chart = c3.generate({
  bindto: '#div1',  
  data: {
        json: json1,
        onclick: function(event) { clickhandler(event) },
        keys: {
            x: 'date',
            value: ['upload', 'download']
        }
    },
    axis: {
        x: {
            type: 'timeseries',
            tick: {
                format: function (x) {
                    if (x.getDate() === 1) {
                        return x.toLocaleDateString();
                    }
                }
            }
        }
    }
});

// MAKE CHANGES TO THE LOADED CHART
setTimeout(function () {
    // CHANGE THE CLICK EVENT HANDLER
    clickhandler = function(event) {
        console.log('22222222222');
    };
    // UNLOAD EXISTING DATA AND LOAD NEW DATA FROM JSON2
    chart.load({
                json: json2,
                keys: {
                    x: 'date',
                    value: ['upload', 'download']
                },
                unload: chart.columns
   });
}, 1000);

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/c3/0.4.11/c3.css" rel="stylesheet"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/c3/0.4.11/c3.js"></script>
<div id="div1"></div>

Thank you for your reply. It helped. – Raichu Jun 16 '16 at 14:21 — Raichu, Jun 16 '16 at 14:21

How to change the onClick function of C3 load function

1 Answers1