Chart.js/test/fixtures/plugin.filler/line/dataset/dual.json

{
    "config": {
        "type": "line",
        "data": {
            "labels": ["0", "1", "2", "3", "4", "5", "6", "7", "8"],
            "datasets": [{
                "backgroundColor": "rgba(255, 0, 0, 0.25)",
                "data": [0, 1, 2, -1, 0, 2, 1, -1, -2],
                "fill": {
                  "target": "+1",
                  "above": "rgba(255, 0, 0, 0.25)",
                  "below": "rgba(0, 0, 255, 0.25)"
                }
            }, {
                "data": [0, 0, 0, 0, 0, 0, 0, 0, 0]
            }]
        },
        "options": {
            "responsive": false,
            "spanGaps": true,
            "scales": {
                "x": {
                    "display": false
                },
                "y": {
                    "display": false
                }
            },
            "elements": {
                "point": {
                    "radius": 0
                },
                "line": {
                    "borderColor": "transparent",
                    "tension": 0
                }
            },
            "plugins": {
                "legend": false,
                "title": false,
                "tooltip": false
            }
        }
    },
    "options": {
        "canvas": {
            "height": 256,
            "width": 512
        }
    }
}