| <!DOCTYPE html> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <div id="outer"> |
| <div id="inner"> |
| <div id="innermost"> |
| </div> |
| </div> |
| </div> |
| <script> |
| test(function(t) |
| { |
| if (!window.internals) |
| assert_unreached('This test requires window.internals.'); |
| |
| outer.style.fontSize = "16px"; |
| innermost.style.fontSize = "1em"; |
| |
| inner.offsetTop; // Force recalc. |
| assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 0); |
| |
| assert_equals(getComputedStyle(outer).fontSize, "16px"); |
| assert_equals(getComputedStyle(inner).fontSize, "16px"); |
| assert_equals(getComputedStyle(innermost).fontSize, "16px"); |
| |
| inner.offsetTop; // Force recalc. |
| outer.style.fontSize = '10px'; |
| assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 3); |
| |
| assert_equals(getComputedStyle(outer).fontSize, "10px"); |
| assert_equals(getComputedStyle(inner).fontSize, "10px"); |
| assert_equals(getComputedStyle(innermost).fontSize, "10px"); |
| |
| inner.offsetTop; // Force recalc. |
| inner.style.fontSize = '16px'; |
| assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 2); |
| |
| assert_equals(getComputedStyle(outer).fontSize, "10px"); |
| assert_equals(getComputedStyle(inner).fontSize, "16px"); |
| assert_equals(getComputedStyle(innermost).fontSize, "16px"); |
| }, "Changing font-size (a non-independent inherited property) in a way that results in an identical ComputedStyle still triggers a style recalc for its children."); |
| |
| test(function(t) |
| { |
| if (!window.internals) |
| assert_unreached('This test requires window.internals.'); |
| |
| outer.style.fontWeight = "normal"; |
| innermost.style.fontWeight = "lighter"; |
| |
| inner.offsetTop; // Force recalc. |
| assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 0); |
| |
| assert_equals(getComputedStyle(outer).fontWeight, "400"); |
| assert_equals(getComputedStyle(inner).fontWeight, "400"); |
| assert_equals(getComputedStyle(innermost).fontWeight, "100"); |
| |
| inner.offsetTop; // Force recalc. |
| inner.style.fontWeight = 'bolder'; |
| assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 2); |
| |
| assert_equals(getComputedStyle(outer).fontWeight, "400"); |
| assert_equals(getComputedStyle(inner).fontWeight, "700"); |
| assert_equals(getComputedStyle(innermost).fontWeight, "400"); |
| |
| inner.offsetTop; // Force recalc. |
| outer.style.fontWeight = 'bold'; |
| assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 3); |
| |
| assert_equals(getComputedStyle(outer).fontWeight, "700"); |
| assert_equals(getComputedStyle(inner).fontWeight, "900"); |
| assert_equals(getComputedStyle(innermost).fontWeight, "700"); |
| }, "Changing font-weight (a non-independent inherited property) in a way that results in an identical ComputedStyle still triggers a style recalc for its children."); |
| </script> |
