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Posted to commits@echarts.apache.org by GitBox <gi...@apache.org> on 2022/06/15 11:06:55 UTC
[GitHub] [echarts] googirle opened a new issue, #17222: [Feature] series label color supports function
googirle opened a new issue, #17222:
URL: https://github.com/apache/echarts/issues/17222
### What problem does this feature solve?
Now we can't config the color of label according to the value, since the configuration of color only support constant
`const option = {
...,
series: [
{
label: {
color: '#eee'
}
}
]`
### What does the proposed API look like?
such as :
`option = {
series: [
{
label: {
color: function (value, index) {
return value >= 0 ? 'green' : 'red';
}
}
}]`
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[GitHub] [echarts] jiawulin001 commented on issue #17222: [Feature] series label color supports function
Posted by GitBox <gi...@apache.org>.
jiawulin001 commented on issue #17222:
URL: https://github.com/apache/echarts/issues/17222#issuecomment-1158554209
Thank you, I got what you mean. You want the label color changes as the series data changes.
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[GitHub] [echarts] googirle commented on issue #17222: [Feature] series label color supports function
Posted by GitBox <gi...@apache.org>.
googirle commented on issue #17222:
URL: https://github.com/apache/echarts/issues/17222#issuecomment-1156413702
@jiawulin001 thanks for your suggestion，but I'm afraid I can't get value from series and determine the color with the size of the number
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[GitHub] [echarts] jiawulin001 commented on issue #17222: [Feature] series label color supports function
Posted by GitBox <gi...@apache.org>.
jiawulin001 commented on issue #17222:
URL: https://github.com/apache/echarts/issues/17222#issuecomment-1157114667
My proposal is based on the example you give. If that's not the case, can you give a more concrete or precise example so we can better understand your requirement?
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[GitHub] [echarts] googirle commented on issue #17222: [Feature] series label color supports function
Posted by GitBox <gi...@apache.org>.
googirle commented on issue #17222:
URL: https://github.com/apache/echarts/issues/17222#issuecomment-1158471133
@jiawulin001
For example a histogram, I want the label of each column to be red when the number of it is greater than 10 and be blue when less than 5, otherwise gray. Just like the second chart above.
I think the option should be like
```js
option = {
series: [{
label: {
color: (value, index) => return value >= 10 ? 'red' : value <= 5 ? 'blue' : 'gray'
}
}]
```
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[GitHub] [echarts] jiawulin001 commented on issue #17222: [Feature] series label color supports function
Posted by GitBox <gi...@apache.org>.
jiawulin001 commented on issue #17222:
URL: https://github.com/apache/echarts/issues/17222#issuecomment-1156376829
You don't need a new feature to do this. Try using [**Template String**](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals) which allows you to use `${expression}` in string.
You can refer to the demo below and try altering the value of `num`:
<details>
<summary>Code Sample</summary>
```
const num = -5;
option = {
xAxis: {
type: 'category',
data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
},
yAxis: {
type: 'value'
},
series: [
{
data: [120, 200, 150, 80, 70, 110, 130],
type: 'bar',
showBackground: true,
backgroundStyle: {
color: 'rgba(180, 180, 180, 0.2)'
},
label:{
show: true,
color:`${num > 0 ? 'red' : 'blue'}`
}
}
]
};
```
</details>
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[GitHub] [echarts] googirle commented on issue #17222: [Feature] series label color supports function
Posted by GitBox <gi...@apache.org>.
googirle commented on issue #17222:
URL: https://github.com/apache/echarts/issues/17222#issuecomment-1158681478
@jiawulin001 Yes, my thoughts exactly.
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