getRangeAt.html (1057B)
1 <!DOCTYPE html> 2 <title>The getRangeAt method</title> 3 <script src=/resources/testharness.js></script> 4 <script src=/resources/testharnessreport.js></script> 5 <link rel="help" href="https://w3c.github.io/selection-api/#dom-selection-getrangeat"> 6 <body> 7 <script> 8 const sel = getSelection(); 9 10 test(function() { 11 var range = document.createRange(); 12 sel.addRange(range); 13 assert_throws_dom("INDEX_SIZE_ERR", function() { sel.getRangeAt(-1); }) 14 assert_throws_dom("INDEX_SIZE_ERR", function() { sel.getRangeAt(1); }) 15 }, "Only supports index 0"); 16 17 test(() => { 18 sel.removeAllRanges(); 19 assert_throws_dom("INDEX_SIZE_ERR", () => sel.getRangeAt(0)) 20 }, "Throws when with no range"); 21 22 test(() => { 23 sel.addRange(document.createRange()); 24 assert_equals(sel.getRangeAt(0), sel.getRangeAt(0)); 25 }, "Returns the same range object when with no selection change"); 26 27 test(() => { 28 const range = sel.getRangeAt(0); 29 sel.collapse(document.body); 30 assert_not_equals(range, sel.getRangeAt(0)); 31 }, "Returns a different range object when with selection change"); 32 </script>