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at-property-cssom.html
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<!DOCTYPE html>
<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api-1/#cssom">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
@property --valid {
syntax: "<color> | none";
inherits: false;
initial-value: red;
}
@property --valid-reverse {
initial-value: 0px;
inherits: true;
syntax: "<length>";
}
@property --valid-universal {
syntax: "*";
inherits: false;
}
@property --valid-whitespace {
syntax: " <color># ";
inherits: false;
initial-value: red, blue;
}
@property --vALId {
syntax: "<color> | none";
inherits: false;
initial-value: red;
}
@property --no-descriptors {
}
@property --no-syntax {
inherits: false;
initial-value: red;
}
@property --no-inherits {
syntax: "<color> | none";
initial-value: red;
}
@property --no-initial-color-value {
syntax: "<color> | none";
inherits: false;
}
@property --no-initial-universal-value {
syntax: "*";
inherits: false;
}
@property --syntax-only {
syntax: "<color> | none";
}
@property --inherits-only {
inherits: true;
}
@property --initial-value-only {
initial-value: red;
}
/* U+0009 CHARACTER TABULATION */
@property --tab\9 tab {
syntax: "*";
inherits: true;
}
</style>
<script>
function find_at_property_rule(name) {
for (let rule of document.styleSheets[0].cssRules) {
if (rule.constructor.name != "CSSPropertyRule")
continue;
if (rule.name == name)
return rule;
}
return null;
}
function test_invalid(name) {
test(() => {
let rule = find_at_property_rule(name);
assert_true(!rule);
}, `Rule for ${name} is invalid`);
}
function test_css_text(name, expected) {
test(() => {
let rule = find_at_property_rule(name);
assert_true(!!rule);
assert_equals(rule.cssText, expected);
}, `Rule for ${name} has expected cssText`);
}
function test_name(name) {
test(() => {
let rule = find_at_property_rule(name);
assert_true(!!rule);
assert_equals(rule.name, name);
}, `Rule for ${name} returns expected value for CSSPropertyRule.name`);
}
function test_syntax(name, expected) {
test(() => {
let rule = find_at_property_rule(name);
assert_true(!!rule);
assert_equals(rule.syntax, expected);
}, `Rule for ${name} returns expected value for CSSPropertyRule.syntax`);
}
function test_inherits(name, expected) {
test(() => {
let rule = find_at_property_rule(name);
assert_true(!!rule);
assert_equals(rule.inherits, expected);
}, `Rule for ${name} returns expected value for CSSPropertyRule.inherits`);
}
function test_initial_value(name, expected) {
test(() => {
let rule = find_at_property_rule(name);
assert_true(!!rule);
assert_equals(rule.initialValue, expected);
}, `Rule for ${name} returns expected value for CSSPropertyRule.initialValue`);
}
// Invalid @property rules.
test_invalid('--no-descriptors');
test_invalid('--no-syntax');
test_invalid('--no-inherits');
test_invalid('--no-initial-color-value');
test_invalid('--syntax-only', '@property --syntax-only { syntax: "<color> | none"; }');
test_invalid('--inherits-only', '@property --inherits-only { inherits: true; }');
test_invalid('--initial-value-only', '@property --initial-value-only { initial-value: red; }');
// CSSPropertyRule.cssText
test_css_text('--valid', '@property --valid { syntax: "<color> | none"; inherits: false; initial-value: red; }');
test_css_text('--valid-reverse', '@property --valid-reverse { syntax: "<length>"; inherits: true; initial-value: 0px; }');
test_css_text('--valid-universal', '@property --valid-universal { syntax: "*"; inherits: false; }');
test_css_text('--valid-whitespace', '@property --valid-whitespace { syntax: " <color># "; inherits: false; initial-value: red, blue; }');
test_css_text('--vALId', '@property --vALId { syntax: "<color> | none"; inherits: false; initial-value: red; }');
test_css_text('--no-initial-universal-value', '@property --no-initial-universal-value { syntax: "*"; inherits: false; }');
test_css_text('--tab\ttab', '@property --tab\\9 tab { syntax: "*"; inherits: true; }');
// CSSRule.type
test(() => {
let rule = find_at_property_rule('--valid');
assert_equals(rule.type, 0);
}, 'CSSRule.type returns 0');
// CSSPropertyRule.name
test_name('--valid');
test_name('--valid-reverse');
test_name('--valid-universal');
test_name('--valid-whitespace');
test_name('--vALId');
test_name('--no-initial-universal-value');
// CSSPropertyRule.syntax
test_syntax('--valid', '<color> | none');
test_syntax('--valid-reverse', '<length>');
test_syntax('--valid-universal', '*');
test_syntax('--valid-whitespace', ' <color># ');
test_syntax('--vALId', '<color> | none');
test_syntax('--no-initial-universal-value', '*');
// CSSPropertyRule.inherits
test_inherits('--valid', false);
test_inherits('--valid-reverse', true);
test_inherits('--valid-universal', false);
test_inherits('--valid-whitespace', false);
test_inherits('--vALId', false);
test_inherits('--no-initial-universal-value', false);
// CSSPropertyRule.initialValue
test_initial_value('--valid', 'red');
test_initial_value('--valid-reverse', '0px');
test_initial_value('--valid-universal', null);
test_initial_value('--valid-whitespace', 'red, blue');
test_initial_value('--vALId', 'red');
test_initial_value('--no-initial-universal-value', null);
</script>