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javascriptsvgecmascript-5

Is there a way to identify which part of a SVG TextPath was clipped

I have a SVG textPath shown below.

<text class="text" dominant-baseline="middle" style="font-size: 0.3em">
<textPath class="text-path" href="#2abd837a-0">Cats and dogs</textPath>
</text>

This textPath is correctly showing the clipped based on the length of the path referenced by #2abd837a-0.

How would I go about using javascript to find the length of the clipped and invisible text? Is this even possible?

Solution

  • You can calculate the text length by using the getComputedTextLength method. you can calculate the path length by using the getTotalLength method.

    let textLength = elText.getComputedTextLength();
let pathLength = abd837a.getTotalLength();
let invisibleTextLength = textLength > pathLength ? textLength - pathLength : 0;

console.log(textLength,pathLength,invisibleTextLength)
    <svg viewBox="120 100 100 100">
<path id="abd837a" d="M 130 110 C 120 140, 180 140, 170 110" stroke="black" fill="transparent"/>
<text id="elText" class="text" dominant-baseline="middle" style="font-size: 16px">  
  <textPath class="text-path" href="#abd837a">Cats and dogs</textPath>
</text>
</svg>