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/SVG

pointsAtX

The pointsAtX attribute represents the x location in the coordinate system established by attribute primitiveUnits on the <filter> element of the point at which the light source is pointing.

Only one element is using this attribute: <feSpotLight>

<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">

  <filter id="lighting1" x="0" y="0" width="100%" height="100%">
    <feDiffuseLighting in="SourceGraphic">
      <feSpotLight x="60" y="60" z="50" pointsAtX="0" />
    </feDiffuseLighting>
  </filter>
  <filter id="lighting2" x="0" y="0" width="100%" height="100%">
    <feDiffuseLighting in="SourceGraphic">
      <feSpotLight x="60" y="60" z="50" pointsAtX="400" />
    </feDiffuseLighting>
  </filter>

  <rect x="0" y="0" width="200" height="200" style="filter: url(#lighting1);" />
  <rect x="0" y="0" width="200" height="200" style="filter: url(#lighting2); transform: translateX(220px);" />
</svg>

Usage notes

Default value	`0`
Value	`<number>`
Animatable	Yes

Specifications

Specification	Status	Comment
Filter Effects Module Level 1 The definition of 'pointsAtX' in that specification.	Working Draft	No change
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of 'pointsAtX' in that specification.	Recommendation	Initial definition

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
`pointsAtX`	Yes	12	4	Yes	9	?

	Mobile
	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`pointsAtX`	Yes	Yes	Yes	?	?	Yes

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https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/pointsAtX