diff --git a/javascript/extraNetworks.js b/javascript/extraNetworks.js
index c7d5a306..c6702de4 100644
--- a/javascript/extraNetworks.js
+++ b/javascript/extraNetworks.js
@@ -283,7 +283,7 @@ function setupExtraNetworks() {
     setupExtraNetworksForTab("img2img");
 }
 
-let re_extranet = /<([^:^>]+:[^:]+):[\d.]+>(.*)/;
+var re_extranet = /<([^:^>]+:[^:]+):[\d.]+>(.*)/s;
 let re_extranet_g = /<([^:^>]+:[^:]+):[\d.]+>/g;
 
 let re_extranet_neg = /\(([^:^>]+:[\d.]+)\)/;
diff --git a/modules/ui_extra_networks.py b/modules/ui_extra_networks.py
index 06c9d6f4..3a0d215e 100644
--- a/modules/ui_extra_networks.py
+++ b/modules/ui_extra_networks.py
@@ -177,10 +177,8 @@ def add_pages_to_demo(app):
     app.add_api_route("/sd_extra_networks/get-single-card", get_single_card, methods=["GET"])
 
 
-def quote_js(s):
-    s = s.replace('\\', '\\\\')
-    s = s.replace('"', '\\"')
-    return f'"{s}"'
+def quote_js(s: str) -> str:
+    return json.dumps(s, ensure_ascii=False)
 
 
 class ExtraNetworksPage: