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Async scripts execute before preceding synchronous scripts, causing ReferenceError and premature load event

Async scripts execute before preceding synchronous scripts, causing ReferenceError and premature load event: a task in LegoFlow-SWE (Harbor dataset). When an HTML document contains both synchronous ( <script ) and asynchronous ( <script async ) scripts, jsdom may execute the async script before…

The task

When an HTML document contains both synchronous (`<script>`) and asynchronous (`<script async>`) scripts, jsdom may execute the async script **before** the synchronous script that precedes it in the DOM. This breaks real browser semantics and leads to unpredictable runtime errors, such as `ReferenceError`, when the…

Part of Lego-X/LegoFlow-SWE.