使用d3-tip的工具提示未显示

问题描述

我正在尝试使用Angular，d3 v4，d3-tip在svg中实现工具提示.

I'm trying to implement a tooltip in svg using Angular, d3 v4, d3-tip.

这是JS逻辑

var data = [{
    train: 1
}, {
    train: 2
}, {
    train: 3
}, {
    train: 4
}]
const tip = d3Tip()
let svg =d3.select('svg')
tip
  .offset([-10, 0])
  .html(d => {
    return (
      `<strong>Frequency:</strong> <span style="color:red"> test</span>"`
    )
  })

svg.call(tip)
let selectedElms = d3.selectAll('circle')
  .data(data, function(d) {
    console.log(this.id)
    return (d && d.train) || this['id'];
  })

selectedElms
  .on('mouseover', tip.show)
  .on('mouseout', tip.hide);

  }

问题是屏幕上什么都没有显示，但是我注意到当我将鼠标悬停在元素上时，会触发tip函数(chrome调试器)

The problem is that nothing is shown on screen but I have noticed that when I hover the elements the tip function is triggered ( chrome debugger )

return (
      `<strong>Frequency:</strong> <span style="color:red"> test</span>"`
)

这是一个演示用于代码工作，但是很遗憾，我无法重现该错误.

Here's a demo for code working but unfortunately I can't reproduce the error.

我要提到的是我的真实示例，该代码位于可观察的订阅中

I want to mention that is my real example that this code bellow is inside an observable subscription

let selectedElms = d3.selectAll('circle')
  .data(data, function(d) {
    console.log(this.id)
    return (d && d.train) || this['id'];
  })

selectedElms
  .on('mouseover', tip.show)
  .on('mouseout', tip.hide);

  }

推荐答案

如果您的问题不是根据动态数据显示工具提示，则替换以下代码，该工具提示将开始显示-

If your issue is tooltip not showing as per dynamic data then replace the below code, the tooltip will start showing -

    tip.offset([-10, 0]).html(d => {
      return (
        "<strong>Frequency:</strong> <span style='color:red'>" +
         d.train + "</span>"
       );
     });

希望它会对您有所帮助:)

Hope it will help you :)

这篇关于使用d3-tip的工具提示未显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！