1、柱状渐变
渐变
itemStyle: {
normal: {
color: new echarts.graphic.LinearGradient(
0, 0, 0, 1,
[
{offset: 0, color: '#83bff6'},
{offset: 0.5, color: '#fff'},
{offset: 1, color: '#188df0'}
]
)
}
}
