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Test document.currentScript when script is moved during evaluation #20775

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Mar 10, 2021
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Test document.currentScript when script is moved during evaluation #20775

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792d8f6
Test `document.currentScript` when script is moved during evaluation
hiroshige-g Dec 13, 2019
304daa9
Fix typo
hiroshige-g Dec 13, 2019
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59 changes: 59 additions & 0 deletions .../semantics/scripting-1/the-script-element/moving-between-documents-during-evaluation.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<meta charset="utf-8">
<title>Moving script elements between documents during evaluation</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/#execute-the-script-block">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<body>
<script id="outerScript">
"use strict";

async_test(t => {
const outerScript = document.querySelector('#outerScript');
assert_equals(document.currentScript, outerScript);

const innerScript = document.createElement('script');
window.innerScript = innerScript;

window.innerScriptEvaluated = false;
window.anotherDocument = null;

innerScript.innerText = `
window.innerScriptEvaluated = true;
const innerScript = window.innerScript;
assert_equals(document.currentScript, innerScript,
'[1] Before move: currentScript of source Document');
assert_equals(innerScript.ownerDocument, document,
'[1] Before move: ownerDocument');

window.anotherDocument = document.implementation.createHTMLDocument();
window.anotherDocument.body.appendChild(innerScript);

assert_equals(innerScript.ownerDocument, anotherDocument,
'[2] Just after move: ownerDocument');
assert_equals(document.currentScript, innerScript,
'[2] Just after move: currentScript of source Document');
assert_equals(anotherDocument.currentScript, null,
'[2] Just after move: currentScript of destination Document');
`;

document.body.appendChild(innerScript);
assert_true(window.innerScriptEvaluated,
'Inner script should be evaluated synchronously');

assert_equals(document.currentScript, outerScript,
'[3] After inner script: currentScript of source Document');
assert_equals(window.anotherDocument.currentScript, null,
'[3] After inner script: currentScript of destination Document');

t.step_timeout(() => {
assert_equals(document.currentScript, null,
'[4] After outer script: currentScript of source Document');
assert_equals(anotherDocument.currentScript, null,
'[4] After outer script: currentScript of destination Document');
t.done();
}, 0);
}, 'Script moved between documents during evaluation');
</script>