My trend line doesn't show up about chartjs-plugin-trendline HOT 5 CLOSED

const chartisan = new Chartisan({
            el: `#chart${id}`,
            data: chart,
            hooks: new ChartisanHooks()
            .legend(true)
            .colors(colorarray)
            .datasets(objectarray)
            .padding({
                left: 0, 
                right: 0, 
                bottom: 0, 
                top: 20,
            })
            .options({
                options: {
                   // animation,
                    maintainAspectRatio: false,
                    plugins: { 
                        datalabels: {
                            anchor: 'center',
                            clamp: true,
                            align: 'top', 
                            color: () => { 
                                if (type === 'bar'){ 
                                    return 'white'
                                } else {
                                    return '#5D2A42'
                                }
                            },
                        },
                        tooltip: { 
                            enabled: false,
                        },
                        legend: { 
                            position: 'bottom',
                            fullSize: true,
                            labels: {
                                boxHeight: 5,
                                textAlign: 'left',
                                usePointStyle: true,

                                // This more specific font property overrides the global property
                                font: {
                                    size: 15,
                                    family: 'Roboto', 
                                    weight: 'thin',

                                }
                            }
                        }
                    },
                    scales: {       
                        x: {
                            grid: {
                                color: 'white',
                                borderWidth: 2,
                                tickWidth: 2,
                                tickLength: 8,
                                offset: false,
                                borderColor: `rgba(93, 42, 66, ${borderopacity})`,
                                tickColor: '#FFFFFF',
                            },
                            type: 'time',
                            time: { 
                                unit: 'day'
                            },

                        },
                        y: {
                            beginAtZero: () => {
                                if (type == 'bar') {
                                    return true
                                }
                                return false
                            },
                            grid: {
                                color: 'white',
                                borderWidth: 2,
                                tickWidth: 2,
                                tickLength: 8,
                                offset: false,
                                borderColor: `rgba(93, 42, 66, ${borderopacity})`,
                                tickColor: '#FFFFFF',
                            },
                            ticks: {
                                // Include a unit in the ticks
                                callback: function(value, index, values) {
                                    return value + unit;
                                }
                            },

                        }
                    }
                }
            })
        })