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Test script child mutation doees not trigger script execution #58601

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Test script child mutation doees not trigger script execution #58601

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36 changes: 36 additions & 0 deletions ...semantics/scripting-1/the-script-element/script-runs-on-character-data-mutation.window.js
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Original file line number Diff line number Diff line change
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// https://github.com/whatwg/html/issues/12279
test(() => {
window.script_did_run = false;

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

// This prevents execution on insertion.
script.type = '0';

const text = document.createTextNode('script_did_run = true;');
script.append(text);
document.body.append(script);
assert_false(script_did_run,
'Appending script with invalid type does not trigger execution');

// This enables, but does not trigger, execution.
script.type = '';
assert_false(script_did_run,
'Unsetting script type does not trigger execution');

text.data = 'script_did_run = true;';
assert_false(script_did_run,
'Setting CharacterData.data does not trigger execution');

text.appendData(' /* still should not run */');
assert_false(script_did_run,
'appendData() does not trigger execution');

text.replaceData(0, text.length, 'script_did_run = true;');
assert_false(script_did_run,
'replaceData() does not trigger execution');

text.deleteData(text.length - 1, 1);
assert_false(script_did_run,
'deleteData() does not trigger execution');
}, "Script execution is never triggered on child mutation");
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