const arr = []
for (let i = 0; i < 10; i++) {
arr.push(Math.floor(Math.random() * 100 - 50))
}
option = {
title: {
text: '正负值不同颜色'
},
xAxis: {
type: 'category',
data: arr
},
yAxis: {
type: 'value'
},
series: [{
data: arr,
type: 'line',
areaStyle: {}
}],
visualMap: {
show: false,
pieces: [{
gt: Math.min.apply(null, arr),
lte: 0,
color: 'green'
}, {
gt: 0,
lte: Math.max.apply(null, arr),
color: 'red'
} ],
outOfRange: {
color: 'white'
}
}
};