<!DOCTYPE html> <html> <head> <title>variable definition cascading tests</title> <meta rel="author" title="Kevin Babbitt"> <meta rel="author" title="Greg Whitworth"> <link rel="author" title="Microsoft Corporation" href="http://microsoft.com" /> <link rel="help" href="http://www.w3.org/TR/css-variables-1/#using-variables"> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <style> * { --var0:x; } </style> </head> <body> <!-- test global selector --> <div id="t0"></div> <!-- multiple unique variables cascading together --> <div id="t1a" style="--var1:a"> <div id="t1b" style="--var2:b"> <div id="t1c" style="--var3:c"></div> <div id="t1d" style="--var4:d"></div> </div> </div> <!-- testing overwriting --> <div id="t2a" style="--var0:a"> <div id="t2b" style="--var0:b;--var1:c"> <div id="t2c" style="--var0:d;--var1:e"></div> <div id="t2d" style="--var2:f"></div> </div> </div> <script type="text/javascript"> "use strict"; var tests = [ {"divid": "t0", "expectedValues":["x"]}, {"divid": "t1a", "expectedValues":["x","a"]}, {"divid": "t1b", "expectedValues":["x","a","b"]}, {"divid": "t1c", "expectedValues":["x","a","b","c"]}, {"divid": "t1d", "expectedValues":["x","a","b","","d"]}, {"divid": "t2a", "expectedValues":["a"]}, {"divid": "t2b", "expectedValues":["b","c"]}, {"divid": "t2c", "expectedValues":["d","e"]}, {"divid": "t2d", "expectedValues":["x","c","f"]} ]; let maxVariables = 5; tests.forEach(function (testCase) { test( function () { let div = document.getElementById(testCase.divid); let computedStyle = window.getComputedStyle(div); for (var i = 0; i < maxVariables; ++i) { let testVar = "--var" + i; let actualValue = computedStyle.getPropertyValue(testVar); let expectedValue = testCase.expectedValues[i]; if (expectedValue === undefined){ expectedValue = ""; } assert_equals(actualValue, expectedValue, "Actual Value for '" + testVar + "' should match expected value"); } }, "testing cascaded CSS Variables on div '" + testCase.divid + "'"); }); </script> </body> </html>