AnimeJS not drawing complete SVG with LineDrawing

Question

I'm trying to animate the drawing of this SVG:

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<path d="M507.293 57.728C507.293 54.3147 506.802 51.264 505.821 48.576C504.882 45.8453 503.538 43.5413 501.789 41.664C500.04 39.7867 497.949 38.3573 495.517 37.376C493.128 36.352 490.482 35.84 487.581 35.84C484.296 35.84 481.352 36.352 478.749 37.376C476.146 38.4 473.885 39.872 471.965 41.792C470.088 43.712 468.573 46.016 467.421 48.704C466.269 51.392 465.501 54.4 465.117 57.728H507.293ZM464.797 61.632V62.848C464.797 67.6267 465.352 71.8293 466.461 75.456C467.57 79.0827 469.149 82.1333 471.197 84.608C473.245 87.04 475.72 88.8747 478.621 90.112C481.522 91.3493 484.765 91.968 488.349 91.968C491.549 91.968 494.322 91.6267 496.669 90.944C499.016 90.2187 500.978 89.4293 502.557 88.576C504.178 87.68 505.458 86.8907 506.397 86.208C507.336 85.4827 508.018 85.12 508.445 85.12C509 85.12 509.426 85.3333 509.725 85.76L511.389 87.808C510.365 89.088 509 90.2827 507.293 91.392C505.629 92.5013 503.752 93.4613 501.661 94.272C499.613 95.04 497.394 95.6587 495.005 96.128C492.658 96.5973 490.29 96.832 487.901 96.832C483.549 96.832 479.581 96.0853 475.997 94.592C472.413 93.056 469.341 90.8373 466.781 87.936C464.221 85.0347 462.237 81.4933 460.829 77.312C459.464 73.088 458.781 68.2667 458.781 62.848C458.781 58.2827 459.421 54.08 460.701 50.24C462.024 46.3573 463.901 43.0293 466.333 40.256C468.808 37.44 471.816 35.2427 475.357 33.664C478.941 32.0853 482.994 31.296 487.517 31.296C491.101 31.296 494.429 31.9147 497.501 33.152C500.573 34.3893 503.24 36.2027 505.501 38.592C507.762 40.9387 509.533 43.84 510.813 47.296C512.136 50.752 512.797 54.72 512.797 59.2C512.797 60.1387 512.669 60.7787 512.413 61.12C512.157 61.4613 511.73 61.632 511.133 61.632H464.797Z" stroke="#F4F6F5" stroke-width="4" mask="url(#path-1-outside-1_5_9)"/>
</svg>

Which is just an svg of the word "Welcome" in the Lato font

When applying an AnimeJS line drawing animation to it with the following:

Why am I getting these cutoffs?

I've tried different fonts such as Inter, and they work fine. Is this just an issue of the font, or is there something going on with AnimeJS that I'm not understanding?

Answer 1

This issue is caused by dashed strokes.

<svg viewBox="0 0 100 100">
  <path pathLength="100" d="M10 10 h 50 v30 h -50 z" fill="none" stroke="#000" stroke-width="4" stroke-dasharray="100"></path>
</svg>

Although the dashed stroke is closed you see a tiny gap in the upper left corner – Firefox renders a closed stroke.

Anime.js apparently animates the stroke-dasharray/stroke-dashoffset values.

As a workaround you can add extend the dash length by adding a line cap value like stroke-linecap="round"

body {
  background: #000
}

<svg viewBox="0 0 420 99" fill="none" xmlns="http://www.w3.org/2000/svg">
<mask id="path-1-outside-1_5_9" maskUnits="userSpaceOnUse" x="0.00800323" y="0.879997" width="515" height="98" fill="black">
<rect fill="white" x="0.00800323" y="0.879997" width="515" height="98"/>
<path id="pathW" pathLength="100" d="M127.104 5.43999L98.624 96H92.736L65.984 17.408C65.6427 16.3413 65.344 15.232 65.088 14.08C64.832 15.232 64.5333 16.3413 64.192 17.408L37.376 96H31.552L3.008 5.43999H8.448C9.68534 5.43999 10.4747 6.016 10.816 7.168L33.664 81.6C34.1333 83.3067 34.56 85.248 34.944 87.424C35.1573 86.3147 35.3707 85.2907 35.584 84.352C35.7973 83.3707 36.0533 82.4533 36.352 81.6L61.952 7.168C62.1227 6.69866 62.4213 6.29333 62.848 5.952C63.2747 5.61066 63.7867 5.43999 64.384 5.43999H66.176C66.7733 5.43999 67.264 5.61066 67.648 5.952C68.032 6.25066 68.3307 6.656 68.544 7.168L94.144 81.6C94.4427 82.4107 94.6987 83.3067 94.912 84.288C95.168 85.2693 95.4027 86.2933 95.616 87.36C95.8293 86.2933 96.0213 85.2907 96.192 84.352C96.4053 83.3707 96.6187 82.4533 96.832 81.6L119.68 7.168C119.808 6.69866 120.085 6.29333 120.512 5.952C120.981 5.61066 121.515 5.43999 122.112 5.43999H127.104Z"/>
</mask>
  
<use href="#pathW" stroke="#F4F6F5" stroke-width="4" stroke-linecap="round" stroke-linejoin="miter" stroke-dasharray ="100" mask="url(#path-1-outside-1_5_9)" />
<use x="140" href="#pathW" stroke="#F4F6F5" stroke-width="4" stroke-dasharray="100" mask="url(#path-1-outside-1_5_9)" />
<use x="280" href="#pathW" stroke="#F4F6F5" stroke-width="4" mask="url(#path-1-outside-1_5_9)" />

</svg>