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| 1 <html> | |
| 2 <import src="../resources/chai.sky" /> | |
| 3 <import src="../resources/mocha.sky" /> | |
| 4 <script> | |
| 5 describe('MutationObserver.observe', function() { | |
| 6 it('should observe attributes', function() { | |
| 7 var observer = new MutationObserver(function() {}); | |
| 8 var element = document.createElement('div'); | |
| 9 element.setAttribute('data-test', '1'); | |
| 10 | |
| 11 observer.observe(element, {attributeOldValue: true}); | |
| 12 element.setAttribute('data-test', '2'); | |
| 13 var records = observer.takeRecords(); | |
| 14 assert.equal(records.length, 1); | |
| 15 assert.equal(records[0].oldValue, 1); | |
| 16 observer.disconnect(); | |
| 17 | |
| 18 observer.observe(element, {attributeOldValue: false}); | |
| 19 element.setAttribute('data-test', '3'); | |
| 20 var records = observer.takeRecords(); | |
| 21 assert.equal(records.length, 1); | |
| 22 assert.isNull(records[0].oldValue); | |
| 23 observer.disconnect(); | |
| 24 | |
| 25 observer.observe(element, {attributeFilter: ['data-test']}); | |
| 26 element.setAttribute('data-test', '4'); | |
| 27 var records = observer.takeRecords(); | |
| 28 assert.equal(records.length, 1); | |
| 29 assert.isNull(records[0].oldValue); | |
| 30 observer.disconnect(); | |
| 31 }); | |
| 32 }); | |
| 33 </script> | |
| 34 </html> | |
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