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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Overflow: getComputedStyle() for display: -webkit-box in the presence of line-clamp or continue</title>
<link rel="help" href="https://drafts.csswg.org/css-overflow-4/#continue">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id="target"></div>
<script>
// Checks the computed value of `display` in an element with the specified
// properties in `properties`. If `expectedDisplayComputedValue` is not given,
// it will be assumed to be the same as the specified value of `display`.
function test_display_computed(properties, expectedDisplayComputedValue) {
test((t) => {
const target = document.getElementById('target');
for (const [prop, value] of Object.entries(properties)) {
target.style[prop] = value;
}
t.add_cleanup(() => {
for (const prop of Object.keys(properties)) {
target.style.removeProperty(prop);
}
});
assert_equals(
getComputedStyle(target).display,
expectedDisplayComputedValue ?? properties.display
);
}, Object.entries(properties).map(([k, v]) => `${k}: ${v};`).join(" "));
}
test_display_computed({
"display": "-webkit-box"
});
test_display_computed({
"display": "-webkit-box",
"-webkit-box-orient": "vertical"
});
test_display_computed({
"display": "-webkit-box",
"-webkit-box-orient": "vertical",
"-webkit-line-clamp": "none"
});
test_display_computed({
"display": "-webkit-box",
"-webkit-line-clamp": "3"
});
test_display_computed({
"display": "-webkit-box",
"-webkit-box-orient": "horizontal",
"-webkit-line-clamp": "3"
});
test_display_computed({
"display": "-webkit-box",
"-webkit-box-orient": "vertical",
"-webkit-line-clamp": "3"
}, "flow-root");
test_display_computed({
"display": "-webkit-inline-box"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-box-orient": "vertical"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-box-orient": "vertical",
"-webkit-line-clamp": "none"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-line-clamp": "3"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-box-orient": "horizontal",
"-webkit-line-clamp": "3"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-box-orient": "vertical",
"-webkit-line-clamp": "3"
}, "inline-block");
// -webkit-box and -webkit-inline-box are defined in the Compat spec as keyword
// mappings to flex and inline-flex, respectively (along with -webkit-flex and
// -webkit-inline-flex). However, only -webkit(-inline)-box changes computed
// value in the presence of -webkit-line-clamp.
test_display_computed({
"display": "flex",
"-webkit-box-orient": "vertical",
"-webkit-line-clamp": "3"
});
test_display_computed({
"display": "inline-flex",
"-webkit-box-orient": "vertical",
"-webkit-line-clamp": "3"
});
test_display_computed({
"display": "-webkit-flex",
"-webkit-box-orient": "vertical",
"-webkit-line-clamp": "3"
}, "flex");
test_display_computed({
"display": "-webkit-inline-flex",
"-webkit-box-orient": "vertical",
"-webkit-line-clamp": "3"
}, "inline-flex");
if (CSS.supports("line-clamp: none")) {
test_display_computed({
"display": "-webkit-box",
"-webkit-box-orient": "vertical",
"line-clamp": "none"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-box-orient": "vertical",
"line-clamp": "none"
});
}
if (CSS.supports("line-clamp: 2")) {
test_display_computed({
"display": "-webkit-box",
"line-clamp": "2"
});
test_display_computed({
"display": "-webkit-box",
"-webkit-box-orient": "vertical",
"line-clamp": "2"
}, "flow-root");
test_display_computed({
"display": "-webkit-inline-box",
"line-clamp": "2"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-box-orient": "vertical",
"line-clamp": "2"
}, "inline-block");
}
if (CSS.supports("line-clamp: auto")) {
test_display_computed({
"display": "-webkit-box",
"line-clamp": "auto"
});
test_display_computed({
"display": "-webkit-box",
"-webkit-box-orient": "vertical",
"line-clamp": "auto"
}, "flow-root");
test_display_computed({
"display": "-webkit-inline-box",
"line-clamp": "auto"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-box-orient": "vertical",
"line-clamp": "auto"
}, "inline-block");
}
if (CSS.supports("continue: none")) {
test_display_computed({
"display": "-webkit-box",
"-webkit-box-orient": "vertical",
"continue": "none"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-box-orient": "vertical",
"continue": "none"
});
}
if (CSS.supports("continue: discard")) {
test_display_computed({
"display": "-webkit-box",
"continue": "discard"
});
test_display_computed({
"display": "-webkit-box",
"-webkit-box-orient": "vertical",
"continue": "discard"
}, "flow-root");
test_display_computed({
"display": "-webkit-inline-box",
"continue": "discard"
});
test_display_computed({
"display": "-webkit-inline-box",
"-webkit-box-orient": "vertical",
"continue": "discard"
}, "inline-block");
}
</script>
</body>
</html>
|
