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LibWeb: Remove first rule if no argument is given for remove_rule()
While this isn't explicitly mentioned in the specification, there is a WPT test that checks for this behavior.
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5 changed files with 57 additions and 4 deletions
12
Tests/LibWeb/Text/expected/css/CSSStyleSheet-removeRule.txt
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Tests/LibWeb/Text/expected/css/CSSStyleSheet-removeRule.txt
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Exception thrown when removeRule() called on empty sheet: IndexSizeError
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Rule count after adding 3 rules: 3
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Rule text: .test { padding: 10px; }
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Rule text: .test { margin: 5px; }
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Rule text: .test { font-size: 14px; }
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Rule count after calling removeRule with no arguments: 2
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Rule text: .test { margin: 5px; }
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Rule text: .test { font-size: 14px; }
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Rule count after calling removeRule with explicit index: 1
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Rule text: .test { margin: 5px; }
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Exception thrown when given a negative index: IndexSizeError
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Exception thrown when index out of range: IndexSizeError
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41
Tests/LibWeb/Text/input/css/CSSStyleSheet-removeRule.html
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Tests/LibWeb/Text/input/css/CSSStyleSheet-removeRule.html
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<!DOCTYPE html>
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<script src="../include.js"></script>
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<script>
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test(() => {
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const sheet = new CSSStyleSheet();
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try {
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sheet.removeRule();
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println("FAIL");
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} catch (e) {
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println(`Exception thrown when removeRule() called on empty sheet: ${e.name}`);
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}
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sheet.addRule(".test", "padding: 10px");
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sheet.addRule(".test", "margin: 5px");
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sheet.addRule(".test", "font-size: 14px");
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println(`Rule count after adding 3 rules: ${sheet.cssRules.length}`);
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for (const rule of sheet.cssRules) {
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println(`Rule text: ${rule.cssText}`);
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}
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sheet.removeRule();
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println(`Rule count after calling removeRule with no arguments: ${sheet.cssRules.length}`);
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for (const rule of sheet.cssRules) {
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println(`Rule text: ${rule.cssText}`);
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}
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sheet.removeRule(1);
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println(`Rule count after calling removeRule with explicit index: ${sheet.cssRules.length}`);
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println(`Rule text: ${sheet.cssRules[0].cssText}`);
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try {
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sheet.removeRule(-1);
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println("FAIL");
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} catch (e) {
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println(`Exception thrown when given a negative index: ${e.name}`);
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}
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try {
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sheet.removeRule(1);
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println("FAIL");
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} catch (e) {
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println(`Exception thrown when index out of range: ${e.name}`);
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}
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});
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</script>
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