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playground: set default LANGUAGE_BASE_URL to "." to fix subfolder hosting

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Previously with the empty string base URL, the playground would not work when hosted at a subfolder of the domain. This is because playground.js has this code:

      const url = `${LANGUAGE_BASE_URL}/tree-sitter-${newLanguageName}.wasm`;

With an empty string, it would look for wasm at the root of the website and 404.

Github code search shows that this is an issue which lots of people have run into, and everyone has to work around it: https://github.com/search?q=%2FLANGUAGE_BASE_URL+%3D+%22%22%2F+-language%3AHTML&type=code

Related to https://www.github.com/tree-sitter/tree-sitter/issues/5230
This commit is contained in:
katrinafyi 2026-03-21 01:13:30 +10:00 committed by Will Lillis
parent c6c137a329
commit ac17c8d003
1 changed files with 1 additions and 1 deletions
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crates/cli/src/playground.html
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@ -470,7 +470,7 @@
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/6.65.7/codemirror.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/clusterize.js/0.19.0/clusterize.min.js"></script>
<script>LANGUAGE_BASE_URL = "";</script>
<script>LANGUAGE_BASE_URL = ".";</script>
<script type="module" src="playground.js"></script>
<script type="module">
import * as TreeSitter from './web-tree-sitter.js';