<!DOCTYPE html><html><head><metacharset="utf-8"><title>Unique Identifier</title><linkrel="help"href="https://w3c.github.io/mathml-core/#attributes-common-to-html-and-mathml-elements"><linkrel="help"href="https://w3c.github.io/mathml-core/#dom-and-javascript"><metaname="assert"content="Verify whether the getElementById() works for MathML elements."><scriptsrc="/resources/testharness.js"></script><scriptsrc="/resources/testharnessreport.js"></script><script>setup({explicit_done:true});window.addEventListener("DOMContentLoaded",function(){varmtext=document.getElementById("MTEXT");test(function(){assert_equals(mtext,document.body.lastElementChild.lastElementChild);},"getElementById()");done();});</script></head><body><divid="log"></div><math><mtextid="MTEXT_"></mtext><mtextid="MTEX"></mtext><mtextid="MTEXT"></mtext></math></body></html>