Angular/SVG-将数据传递到SVG [英] Angular / svg - pass data into svg

问题描述

我在这里有一个堆叠闪电- https://stackblitz.com/edit/angular-vkwets?file=src%2Fapp%2Fdonuts.template.html

I have a stackblitz here - https://stackblitz.com/edit/angular-vkwets?file=src%2Fapp%2Fdonuts.template.html

我有一个Angular组件，它为传​​递给该组件的数组的每个数据点创建一个svg甜甜圈图.

I have an Angular component that creates an svg donut chart for each data point of an array passed to the component.

我可以访问传递到组件中的数据，但是可以在svg中使用它.

I can access the data passed into the component but is it possible to use this in the svg.

我想使用传递给组件的数据更新svg中的'stroke-dasharray'.

I would like to update the 'stroke-dasharray' in the svg using the data passed to the component.

类似于 stroke-dasharray = donut.percent 100-donut.perecent

<div>
  <ul>
    <li *ngFor="let donut of donutData">
      {{donut.percent}}
      <svg width="20%" height="20%" viewBox="0 0 42 42" class="donut">
        <circle class="donut-hole" 
                cx="21" 
                cy="21" 
                r="15.91549430918954" 
                fill="#fff"></circle>

        <circle class="donut-ring" 
                cx="21" 
                cy="21" 
                r="15.91549430918954" 
                fill="transparent" 
                stroke="#d2d3d4" 
                stroke-width="3"></circle>

        <circle class="donut-segment" 
                cx="21" 
                cy="21" 
                r="15.91549430918954" 
                fill="transparent" 
                stroke="green" 
                stroke-width="3" 
                stroke-dasharray="60 40"
                stroke-dashoffset="25"></circle>
      </svg>

    </li>
  </ul>
</div>

推荐答案

将值转换为字符串并使用属性绑定:

Convert the values to a string and use attribute binding:

[attr.stroke-dasharray]="donut.percent + ' ' + (100 - donut.percent)"

有关演示，请参见此stackblitz .

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