| <!doctype html> |
| <head> |
| <meta charset=utf-8> |
| <title>Modify HTMLScriptElement's text after #prepare-a-script</title> |
| <link rel=help href="https://html.spec.whatwg.org/multipage/scripting.html#prepare-a-script"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <script> |
| var t = async_test("Modify inline script element's text " + |
| "after prepare-a-script before evaluation"); |
| |
| function changeScriptText() { |
| document.querySelector('#script0').textContent = |
| 't.unreached_func("This should not be evaluated")();'; |
| } |
| |
| t.step_timeout(changeScriptText, 500); |
| </script> |
| |
| <!-- This is "a style sheet that is blocking scripts" and thus ... --> |
| <link rel="stylesheet" href="/common/slow.py?pipe=trickle(d1)"></link> |
| |
| <!-- This inline script becomes a parser-blocking script, and thus |
| the step_timeout is evaluated after script0 is inserted into DOM, |
| prepare-a-script'ed, but before its evaluation. --> |
| <script id="script0"> |
| t.step(() => { |
| // When this is evaluated after the stylesheet is loaded, |
| // script0's innerText is modified by the async script above, |
| // but the evaluated script is still the original script here, |
| // not what is overwritten, because "child text content" is taken in |
| // #prepare-a-script and passed to "creating a classic script". |
| var s = document.getElementById('script0'); |
| assert_equals(s.innerText, |
| 't.unreached_func("This should not be evaluated")();', |
| "<script>'s innerText should be already modified"); |
| assert_equals(s.text, |
| 't.unreached_func("This should not be evaluated")();', |
| "<script>'s text should be already modified"); |
| t.done(); |
| }); |
| </script> |
