movie/public/plugin/c3-0.7.20/docs/js/samples/interaction_zoom_by_drag.js

var chart = c3.generate({
    data: {
        columns: [
            ['sample', 30, 200, 100, 400, 150, 250, 150, 200, 170, 240, 350, 150, 100, 400, 150, 250, 150, 200, 170, 240, 100, 150, 250, 150, 200, 170, 240, 30, 200, 100, 400, 150, 250, 150, 200, 170, 240, 350, 150, 100, 400, 350, 220, 250, 300, 270, 140, 150, 90, 150, 50, 120, 70, 40]
        ]
    },
    zoom: {
        enabled: true,
        type: 'drag',
    }
});