File: transform-matrix-009.html

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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Test (Transforms): matrix() with zeros in the diagonal</title>
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
<link rel="help" href="https://www.w3.org/TR/css-transforms-1/#funcdef-transform-matrix">
<link rel="help" href="https://www.w3.org/TR/css-transforms-1/#transform-function-lists">
<link rel="help" href="https://github.com/servo/servo/issues/37146">
<link rel="match" href="../reference/ref-filled-green-200px-square.html">
<meta name="assert" content="Tests that the element is still rendered,
    even though the current transformation matrix has zeros in the diagonal,
    as long as the matrix remains invertible.">

<style>
.wrapper {
  width: 200px;
  height: 200px;
  background: red;
}
.test {
  width: 200px;
  height: 200px;
  background: green;
  transform: matrix(0,1, 1,0, 0,0);
  /*
    The resulting matrix is:
    ┌         ┐
    │ 0 1 0 0 │
    │ 1 0 0 0 │
    │ 0 0 1 0 │
    │ 0 0 0 1 │
    └         ┘
    It could result from e.g. `scaleX(-1) rotate(90deg)`.
  */
}
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div class="wrapper">
  <div class="test"></div>
</div>