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+<!DOCTYPE html>
+<title>SVGTextContentElement.getSubStringLength on Emoji with ligatures</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<svg>
+ <g font-size="50" text-rendering="geometricPrecision">
+ <text y="50">๐Ÿ‘ฆ</text>
+ <text y="100">๐Ÿ‘จโ€๐Ÿ‘ฉโ€๐Ÿ‘งโ€๐Ÿ‘ฆ</text>
+ <text y="50" x="100">๐Ÿ‘จโ€</text>
+ <text y="100" x="100">๐Ÿ‘ฉ๐Ÿฝโ€๐ŸŒพ</text>
+ <text y="50" x="150">๐Ÿ‘จโ€๐Ÿ‘ฆ</text>
+ <text y="100" x="150">๐Ÿ‘ฑ๐Ÿฝโ€โ™‚๏ธ</text>
+ <text y="50" x="200">๐ŸŽ…๐Ÿฝ</text>
+ </g>
+</svg>
+<script>
+test(function() {
+ for (const element of Array.from(document.getElementsByTagName('text'))) {
+ const subStringLength = element.getSubStringLength(0, element.getNumberOfChars());
+ const bboxWidth = element.getBBox().width;
+ // Expect the value computed by getSubStringLength() to roughly
+ // match the value computed for the bbox.
+ assert_approx_equals(subStringLength, bboxWidth, 1);
+ }
+});
+</script>