diff --git a/build/configure/src/aqt.rs b/build/configure/src/aqt.rs
index cad07ae4d..242c81f57 100644
--- a/build/configure/src/aqt.rs
+++ b/build/configure/src/aqt.rs
@@ -146,7 +146,7 @@ fn build_css(build: &mut Build) -> Result<()> {
             },
         )?;
     }
-    let other_ts_css = build.inputs_with_suffix(inputs![":ts:reviewer:reviewer.css"], ".css");
+    let other_ts_css = build.inputs_with_suffix(inputs![":ts:editor", ":ts:reviewer:reviewer.css"], ".css");
     build.add_action(
         "qt:aqt:data:web:css",
         CopyFiles {
@@ -188,7 +188,7 @@ fn build_js(build: &mut Build) -> Result<()> {
         },
     )?;
     let files_from_ts =
-        build.inputs_with_suffix(inputs![":ts:reviewer:reviewer.js", ":ts:mathjax"], ".js");
+        build.inputs_with_suffix(inputs![":ts:editor", ":ts:reviewer:reviewer.js", ":ts:mathjax"], ".js");
     build.add_action(
         "qt:aqt:data:web:js",
         CopyFiles {
diff --git a/build/configure/src/web.rs b/build/configure/src/web.rs
index 152a1a4d0..9e027fec3 100644
--- a/build/configure/src/web.rs
+++ b/build/configure/src/web.rs
@@ -29,6 +29,7 @@ pub fn build_and_check_web(build: &mut Build) -> Result<()> {
     build_sveltekit(build)?;
     declare_and_check_other_libraries(build)?;
     build_and_check_pages(build)?;
+    build_and_check_editor(build)?;
     build_and_check_reviewer(build)?;
     build_and_check_mathjax(build)?;
     check_web(build)?;
@@ -217,6 +218,33 @@ fn build_and_check_pages(build: &mut Build) -> Result<()> {
     Ok(())
 }
 
+/// Only used for the legacy editor page.
+fn build_and_check_editor(build: &mut Build) -> Result<()> {
+    let editor_deps = inputs![
+        ":ts:lib",
+        ":ts:components",
+        ":ts:domlib",
+        ":ts:sveltelib",
+        ":ts:html-filter",
+        ":sass",
+        ":sveltekit",
+        glob!("ts/lib/editable,routes/{editor,image-occlusion}/**")
+    ];
+
+    build.add_action(
+        "ts:editor",
+        EsbuildScript {
+            script: "ts/bundle_svelte.mjs".into(),
+            entrypoint: "ts/routes/editor/index.ts".into(),
+            output_stem: "ts/editor/editor",
+            deps: editor_deps.clone(),
+            extra_exts: &["css"],
+        },
+    )?;
+
+    Ok(())
+}
+
 fn build_and_check_reviewer(build: &mut Build) -> Result<()> {
     let reviewer_deps = inputs![
         ":ts:lib",
diff --git a/ts/routes/editor/index.ts b/ts/routes/editor/index.ts
new file mode 100644
index 000000000..d3de21cc3
--- /dev/null
+++ b/ts/routes/editor/index.ts
@@ -0,0 +1,10 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
+// Entry point for the legacy editor page.
+
+import { globalExport } from "@tslib/globals";
+
+import * as base from "./base";
+
+globalExport(base);