From 0d723d3e0514b27285cb36d42a4fd477f4997571 Mon Sep 17 00:00:00 2001
From: Leon Zandman <leon@wirwar.com>
Date: Sun, 10 May 2026 00:26:47 +0200
Subject: [PATCH] Init fix.

---
 src/core/lib/Zstd.mjs |  3 ++-
 webpack.config.js     | 15 +++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/core/lib/Zstd.mjs b/src/core/lib/Zstd.mjs
index a7e013be..6178307b 100644
--- a/src/core/lib/Zstd.mjs
+++ b/src/core/lib/Zstd.mjs
@@ -22,7 +22,8 @@ let initPromise = null;
  */
 export function zstdInit() {
     if (!initPromise) {
-        initPromise = init();
+        const wasmUrl = `${self.docURL}/assets/zstd.wasm`;
+        initPromise = init(wasmUrl);
     }
     return initPromise;
 }
diff --git a/webpack.config.js b/webpack.config.js
index 4c6c00ba..564040f0 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -99,6 +99,10 @@ module.exports = {
                     context: "node_modules/node-forge/dist",
                     from: "prime.worker.min.js",
                     to: "assets/forge/"
+                }, {
+                    context: "node_modules/@bokuweb/zstd-wasm/dist/web/",
+                    from: "zstd.wasm",
+                    to: "assets/"
                 }
             ]
         }),
@@ -110,6 +114,17 @@ module.exports = {
                     operations: [
                         new ReplaceOperation("once", "if (pixelSize < elementMinSize)", "if (false)")
                     ]
+                },
+                {
+                    // @bokuweb/zstd-wasm's init() unconditionally evaluates
+                    // `new URL("./zstd.wasm", import.meta.url)` before checking
+                    // whether a path was passed in. Webpack's `publicPath: ""`
+                    // makes that base URL invalid and the constructor throws.
+                    // Neuter the offending line; we always pass a path from Zstd.mjs.
+                    test: /@bokuweb[\/\\]zstd-wasm[\/\\]dist[\/\\]web[\/\\]index\.web\.js$/,
+                    operations: [
+                        new ReplaceOperation("once", "new URL(`./zstd.wasm`, import.meta.url).href", "''")
+                    ]
                 }
             ]
         })