chromium/third_party/blink/web_tests/fast/multicol/hit-test-end-of-column.html

<!DOCTYPE html>
<div id="target" style="
    outline: dashed lightblue;
    width: 400px;
    -webkit-columns: 2;
    -webkit-column-gap: 0;
    columns: 2;
    column-gap: 0;
    column-fill: auto;
    height: 90px;
    font: 20px Ahem;
">Lorem ipsum dolor sit amet consectetur elit.</div>
<p id="result">
    FAIL: Test did not run.
</p>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();

    // Clicking below the last line in the first column should not select anything from the first
    // line on the second column.
    var target = document.getElementById("target");
    var hitOffset = document.caretRangeFromPoint(target.offsetLeft + 45, target.offsetTop + 87).startOffset;
    document.getElementById("result").innerText = hitOffset === 26 || hitOffset === 24 ? "PASS" : "FAIL: hit offset " + hitOffset + ".";
</script>