2 files changed, 20 insertions, 0 deletions
diff --git a/src/bun.js/bindings/BunString.cpp b/src/bun.js/bindings/BunString.cpp
index 8c5a1e66b..416d5d334 100644
--- a/src/bun.js/bindings/BunString.cpp
+++ b/src/bun.js/bindings/BunString.cpp
@@ -381,6 +381,17 @@ extern "C" BunString URL__getHref(BunString* input)
     return Bun::toStringRef(url.string());
 }
 
+extern "C" BunString URL__getHrefJoin(BunString* baseStr, BunString *relativeStr)
+{
+    auto base = Bun::toWTFString(*baseStr);
+    auto relative = Bun::toWTFString(*relativeStr);
+    auto url = WTF::URL(WTF::URL(base), relative);
+    if (!url.isValid() || url.isEmpty())
+        return { BunStringTag::Dead };
+
+    return Bun::toStringRef(url.string());
+}
+
 extern "C" WTF::URL* URL__fromString(BunString* input)
 {
     auto&& str = Bun::toWTFString(*input);
diff --git a/src/bun.js/bindings/bindings.zig b/src/bun.js/bindings/bindings.zig
index 870b78738..6729ab9ab 100644
--- a/src/bun.js/bindings/bindings.zig
+++ b/src/bun.js/bindings/bindings.zig
@@ -5480,12 +5480,21 @@ pub const URL = opaque {
     extern fn URL__getHrefFromJS(JSValue, *JSC.JSGlobalObject) String;
     extern fn URL__getHref(*String) String;
     extern fn URL__getFileURLString(*String) String;
+    extern fn URL__getHrefJoin(*String, *String) String;
+
     pub fn hrefFromString(str: bun.String) String {
         JSC.markBinding(@src());
         var input = str;
         return URL__getHref(&input);
     }
 
+    pub fn join(base: bun.String, relative: bun.String) String {
+        JSC.markBinding(@src());
+        var base_str = base;
+        var relative_str = relative;
+        return URL__getHrefJoin(&base_str, &relative_str);
+    }
+
     pub fn fileURLFromString(str: bun.String) String {
         JSC.markBinding(@src());
         var input = str;