svgContainer.append('path')
.attr('d', lineFunction([
{ x: this.lineData[0].x, y: 0 },
...this.lineData,
{ x: this.lineData[ this.lineData.length - 1 ].x, y: 0 }
]))
.attr('fill', 'transparent')
.on('mousemove', (d) => {
console.log(d);
});