[Feature] Hope "tooltip" supports "rich". 希望“tooltip”支持“rich”

[leekbillow]

What problem does this feature solve?

目前tooltip不支持rich，renderMode:'richText'似乎是一个没用的选项，在没有dom的微信小程序里，没办法自定义不同的样式。 Currently, richis not supported bytooltip, andrenderMode:'richText'seems to be a useless option. In wechat applets without DOM, there is no way to customize different styles.

option = {
  tooltip: {
    renderMode: 'richText',
    formatter({ name, value }) {
      return `{name|${name}}:{value|${value}}`;
    },
    // invalid 无效
    rich: {
      name: { color: 'red' },
      value: { color: 'blue' }
    },
    textStyle: {
      // invalid 无效
      rich: {
        name: { color: 'red' },
        value: { color: 'blue' }
      }
    }
  },
  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'
    }
  ]
};

What does the proposed API look like?

tooltip.rich or tooltip.textStyle.rich

[echarts-bot[bot]]

@leekbillow It seems you are not using English, I've helped translate the content automatically. To make your issue understood by more people and get helped, we'd like to suggest using English next time. 🤗

TRANSLATED

**TITLE** [Feature] Hope "tooltip" supports "rich". Hope "tooltip" supports "rich" **BODY** ### What problem does this feature solve? Currently `tooltip` does not support `rich`, `renderMode:'richText'` seems to be a useless option, in WeChat applet without dom, there is no way to customize different styles. Currently, `rich` is not supported by `tooltip`, and `renderMode:'richText'`seems to be a useless option. In wechat applets without DOM, there is no way to customize different styles. ````js option = { tooltip: { renderMode: 'richText', formatter({ name, value }) { return `{name|${name}}:{value|${value}}`; }, // invalid is invalid rich: { name: { color: 'red' }, value: { color: 'blue' } }, textStyle: { // invalid is invalid rich: { name: { color: 'red' }, value: { color: 'blue' } } } }, 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' } ] }; ```` ### What does the proposed API look like? `tooltip.rich` or `tooltip.textStyle.rich`

[susiwen8]

tooltip does suppot richText

[xiaofan10]

I have the same problem

[helgasoft]

@leekbillow, instead of rich one could use HTML styles directly, like:

  tooltip: {
    renderMode: 'html',
    formatter({ name, value }) {
      return "<span style='color:red;'>"+name+" </span><span style='color:blue;'>"+value+"</span>";
    },