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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>name attribute changes among multiple meta viewport tags</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<meta name="viewport" content="width=980">
<meta id="viewport" name="initial-name" content="width=device-width, initial-scale=1">
<script src="viewport_helpers.js"></script>
</head>
<body>
<script>
"use strict";
add_task(async function change_name_attribute() {
await SpecialPowers.pushPrefEnv(scaleRatio(1.0));
let viewport = document.getElementById("viewport");
let info = getViewportInfo(800, 480);
// The "width=980" content is a valid one.
fuzzeq(info.defaultZoom, 800/980, "initial scale is calculated based on width");
is(info.minZoom, 0.25, "minimum scale defaults to the absolute minimum");
is(info.maxZoom, 10, "maximum scale defaults to the absolute maximum");
is(info.width, 980, "width is the default width");
is(info.height, 588, "height is proportional to displayHeight");
// Now the second meta tag is a valid viewport.
viewport.setAttribute("name", "viewport");
info = getViewportInfo(800, 480);
is(info.defaultZoom, 1, "initial zoom is 1");
is(info.width, 800, "width should be 800");
is(info.height, 480, "height should be 480");
// Now it's invalid again, but it's retained.
viewport.setAttribute("name", "other");
info = getViewportInfo(800, 480);
is(info.defaultZoom, 1, "initial zoom is 1");
is(info.width, 800, "width should be 800");
is(info.height, 480, "height should be 480");
});
</script>
</body>
</html>
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