<!DOCTYPE html> <html> <head> <title>Testing new font-matching algorithm for font-weight values introduced in CSS Fonts level 4</title> <link rel="help" href="https://www.w3.org/TR/css-fonts-4/#font-matching-algorithm" /> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <style> .testcase { float:left; margin: 5px; font-size:48pt; font-feature-settings: "kern" 1; color: rgba(0,0,0,0.5); background: linear-gradient(to left, lime 0%, lime 91px, red 91px); } @font-face { font-family: fontMatch; src: local('CSSTest Weights 900'), url('./resources/csstest-weights-900-kerned.ttf'); font-weight: 100; } @font-face { font-family: fontMatch; src: local('CSSTest Weights 800'), url('./resources/csstest-weights-800-kerned.ttf'); font-weight: 250; } @font-face { font-family: fontMatch; src: local('CSSTest Weights 700'), url('./resources/csstest-weights-700-kerned.ttf'); font-weight: 400; } @font-face { font-family: fontMatch; src: local('CSSTest Weights 600'), url('./resources/csstest-weights-600-kerned.ttf'); font-weight: 450; } @font-face { font-family: fontMatch; src: local('CSSTest Weights 300'), url('./resources/csstest-weights-300-kerned.ttf'); font-weight: 500; } @font-face { font-family: fontMatch; src: local('CSSTest Weights 200'), url('./resources/csstest-weights-200-kerned.ttf'); font-weight: 750; } @font-face { font-family: fontMatch; src: local('CSSTest Weights 100'), url('./resources/csstest-weights-100-kerned.ttf'); font-weight: 900; } </style> </head> <body> <span style="position: absolute; top: -100vh;"> <span style="font-family: fontMatch; font-weight: 100;">A</span> <span style="font-family: fontMatch; font-weight: 250;">A</span> <span style="font-family: fontMatch; font-weight: 400;">A</span> <span style="font-family: fontMatch; font-weight: 450;">A</span> <span style="font-family: fontMatch; font-weight: 500;">A</span> <span style="font-family: fontMatch; font-weight: 750;">A</span> <span style="font-family: fontMatch; font-weight: 900;">A</span> </span> <div id="testcases" style="overflow: hidden"> <!-- These testcases work using the new kerned CSSTest Weights fonts. The letter A and its corresponding numeric digit kern as one character. --> <div class="testcase" style="font-family:'CSSTest Weights W2569'; font-weight: 375;"> A2 </div> </div> <script> var testFontFaceMatch = [ { weight: 99, expectedFont: "CSSTest Weights 900" }, { weight: 100, expectedFont: "CSSTest Weights 900" }, { weight: 249, expectedFont: "CSSTest Weights 900" }, { weight: 250, expectedFont: "CSSTest Weights 800" }, { weight: 399, expectedFont: "CSSTest Weights 800" }, { weight: 400, expectedFont: "CSSTest Weights 700" }, { weight: 420, expectedFont: "CSSTest Weights 600" }, { weight: 470, expectedFont: "CSSTest Weights 300" }, { weight: 500, expectedFont: "CSSTest Weights 300" }, { weight: 600, expectedFont: "CSSTest Weights 200" }, { weight: 750, expectedFont: "CSSTest Weights 200" }, { weight: 751, expectedFont: "CSSTest Weights 100" }, { weight: 900, expectedFont: "CSSTest Weights 100" }, { weight:1000, expectedFont: "CSSTest Weights 100" }, ]; // wait for the fonts to load // -- this should not be necessary if the fonts are installed as required // -- but if they are not, the test is otherwise unstable var once_fonts_are_ready = (document.fonts ? document.fonts.ready : new Promise(function(ready) { window.onload = time => [...document.querySelectorAll('body > span:nth-child(1) > span')].every(e => e.offsetWidth > 20) ? ready() : requestAnimationFrame(window.onload) })); var testcases = document.querySelector("#testcases"); var testcaseTemplate = document.querySelector('.testcase'); testcaseTemplate.remove(); testFontFaceMatch.forEach(function(element) { var testcase = testcaseTemplate.cloneNode(true); // setup the test case style testcase.style.fontFamily = 'fontMatch'; testcase.style.fontWeight = element.weight; // create the assertion var assertText = 'A' + /\d/.exec(element.expectedFont)[0]; testcase.textContent = assertText; // append the testcase testcases.appendChild(testcase); // verify the testcase promise_test( assert => once_fonts_are_ready.then(assert => { assert_approx_equals(testcase.getBoundingClientRect().width, 90, 2, "@font-face should be mapped to " + element.expectedFont + "."); }), "Test @font-face matching for weight " + element.weight ); }); </script> </body> </html>