css/css-tables/visibility-collapse-rowspan-003.html

<!doctype html>
<meta charset="utf-8">
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<link rel='stylesheet' href='support/base.css' />
<link rel="author" title="Joy Yu" href="mailto:joysyu@mit.edu">
<link rel="help" href="https://drafts.csswg.org/css-tables-3/#computing-the-table-height">
<style>
table {
    border-spacing: 0;
    border-collapse: collapse;
}
table td {
    border: 1px solid blue;
    padding: 5px;
}
</style>
<main>
    <h1>Visibility collapse</h1>
    <a href="https://drafts.csswg.org/css-tables-3/#computing-the-table-height">Spec</a>
    <p>
    Setting a row to visibility:collapse changes table height but not width.
    Here the spanning cell and another cell are in the same row.
    </p>
    <table id="one">
        <tr id="firstRowRef">
            <td>aaaa</td>
        </tr>
        <tr id="secondRowRef">
            <td>bbbb</td>
        </tr>
        <tr id="collapsedRowRef">
            <td rowspan="2">spanning</td>
            <td>cccc</td>
        </tr>
        <tr id="fourthRowRef">
            <td>dddd</td>
        </tr>
        <tr id="fifthRowRef">
            <td>eeee</td>
        </tr>
    </table>
    Bottom table is identical to top except third row has been collapsed.
    <table id="two">
        <tr id="firstRow">
            <td>aaaa</td>
        </tr>
        <tr id="secondRow">
            <td>bbbb</td>
        </tr>
        <tr style="visibility:collapse;" id="collapsedRow">
            <td rowspan="2">spanning</td>
            <td>cccc</td>
        </tr>
        <tr id="fourthRow">
            <td>dddd</td>
        </tr>
        <tr id="fifthRow">
            <td>eeee</td>
        </tr>
    </table>
</main>

<script>
    tests = [
        [
            document.getElementById('two').offsetWidth,
            document.getElementById('one').offsetWidth,
            "spanning row visibility:collapse doesn't change table width"
        ],
        [
            document.getElementById('collapsedRow').offsetHeight,
            0,
            "collapsed row has zero height"
        ],
        [
            document.getElementById('firstRow').offsetHeight,
            document.getElementById('firstRowRef').offsetHeight,
            "first row height doesn't change"
        ],
        [
            document.getElementById('secondRow').offsetHeight,
            document.getElementById('secondRowRef').offsetHeight,
            "second row height doesn't change"
        ],
        [
            document.getElementById('fourthRow').offsetHeight,
            document.getElementById('fourthRowRef').offsetHeight,
            "fourth row height doesn't change"
        ],
        [
            document.getElementById('fifthRow').offsetHeight,
            document.getElementById('fifthRowRef').offsetHeight,
            "fifth row height doesn't change"
        ]];
    for (i = 0; i< tests.length; i++) {
        test(function()
            {
                assert_equals.apply(this, tests[i]);
            },
            tests[i][2]);
    };
</script>
</html>