| <!DOCTYPE html> |
| <meta name="viewport" content="width=device-width,initial-scale=1"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <div id="root"></div> |
| |
| <script> |
| test(function() { |
| var observer = new IntersectionObserver(function(e) {}, {}); |
| test(function() { assert_equals(observer.root, null) }, |
| "observer.root"); |
| test(function() { assert_array_equals(observer.thresholds, [0]) }, |
| "observer.thresholds"); |
| test(function() { assert_equals(observer.rootMargin, "0px 0px 0px 0px") }, |
| "observer.rootMargin"); |
| |
| observer = new IntersectionObserver(function(e) {}, { |
| rootMargin: " ", |
| threshold: [] |
| }); |
| test(function() { assert_array_equals(observer.thresholds, [0]) }, |
| "empty observer.thresholds"); |
| test(function() { assert_equals(observer.rootMargin, "0px 0px 0px 0px") }, |
| "whitespace observer.rootMargin"); |
| |
| var rootDiv = document.getElementById("root"); |
| observer = new IntersectionObserver(function(e) {}, { |
| root: rootDiv, |
| threshold: [0, 0.25, 0.5, 1.0], |
| rootMargin: "10% 20px" |
| }); |
| test(function() { assert_equals(observer.root, rootDiv) }, |
| "set observer.root"); |
| test(function() { assert_array_equals(observer.thresholds, [0, 0.25, 0.5, 1.0]) }, |
| "set observer.thresholds"); |
| test(function() { assert_equals(observer.rootMargin, "10% 20px 10% 20px") }, |
| "set observer.rootMargin"); |
| }, "Observer attribute getters."); |
| |
| </script> |
