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Version: <b>0.9.9</b><br>
Last Updated: <b>2021-11-25</b>
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<a href=../>Home</a> > <a href=../debugging.html>Debugging Tools</a> > Script Window
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<li><a href=#built-in-scripts>Built-in Scripts</a></li>
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<h1>Script Window</h1>
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<li><a href=#built-in-scripts>Built-in Scripts</a></li>
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<p>The Script Window allows <a href=https://www.lua.org/>Lua</a> scripting via a <a href=../apireference.html>Mesen-specific API</a>. Using this API, you can interact with the emulation core to perform a variety of things (e.g: logging, drawing, implementing an AI).</p>
<p>The code editor contains an autocomplete feature for all of Mesen&rsquo;s API &ndash; typing <code>emu.</code> will display an autocomplete popup displaying all available functions. Select a function in the list to see its parameters, return value and description.<br>
Multiple script windows can be opened at once to combine the effects of several scripts together.</p>
<p>Scripts can be loaded from the disk and edited in any other text editor. When using an external editor to modify the script, it is suggested to turn on the <strong>Script→Auto-reload when file changes</strong> option to automatically reload the script each time it is saved to the disk.</p>
<p>To start a script, press <strong>F5</strong>.<br>
To stop a script, press <strong>Escape</strong> or close the script window.</p>
<p>The Log Window at the bottom will display any Lua errors that occur while running the script.
Additionally, any calls to <code>emu.log()</code> will also display their content in the log window.</p>
<h3 id=built-in-scripts>Built-in Scripts</h3>
<p>A number of built-in scripts are accessible from the script window&rsquo;s UI. They can be accessed from the <strong>File→Built-in Scripts</strong> menu, or directly from the toolbar.
These scripts serve as both examples for the Lua API and can also be useful in a number of ways.</p>
<p>The scripts have (mostly) been contributed by users of Mesen (see the top of each script for proper credits) - <strong>if you have useful/interesting scripts that you have written and would like to have included, let me know!</strong></p>
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