1 files changed, 29 insertions, 0 deletions
diff --git a/components/script/dom/trustedscripturl.rs b/components/script/dom/trustedscripturl.rs
index ba1e0335abc..3f0aef248b3 100644
--- a/components/script/dom/trustedscripturl.rs
+++ b/components/script/dom/trustedscripturl.rs
@@ -7,10 +7,14 @@ use std::fmt;
 use dom_struct::dom_struct;
 
 use crate::dom::bindings::codegen::Bindings::TrustedScriptURLBinding::TrustedScriptURLMethods;
+use crate::dom::bindings::codegen::UnionTypes::TrustedScriptURLOrUSVString;
+use crate::dom::bindings::error::Fallible;
 use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
 use crate::dom::bindings::root::DomRoot;
 use crate::dom::bindings::str::DOMString;
 use crate::dom::globalscope::GlobalScope;
+use crate::dom::trustedtypepolicy::TrustedType;
+use crate::dom::trustedtypepolicyfactory::TrustedTypePolicyFactory;
 use crate::script_runtime::CanGc;
 
 #[dom_struct]
@@ -32,6 +36,31 @@ impl TrustedScriptURL {
     pub(crate) fn new(data: String, global: &GlobalScope, can_gc: CanGc) -> DomRoot<Self> {
         reflect_dom_object(Box::new(Self::new_inherited(data)), global, can_gc)
     }
+
+    pub(crate) fn get_trusted_script_url_compliant_string(
+        global: &GlobalScope,
+        value: TrustedScriptURLOrUSVString,
+        containing_class: &str,
+        field: &str,
+        can_gc: CanGc,
+    ) -> Fallible<String> {
+        match value {
+            TrustedScriptURLOrUSVString::USVString(value) => {
+                let sink = format!("{} {}", containing_class, field);
+                TrustedTypePolicyFactory::get_trusted_type_compliant_string(
+                    TrustedType::TrustedScriptURL,
+                    global,
+                    value.as_ref().to_owned(),
+                    &sink,
+                    "'script'",
+                    can_gc,
+                )
+            },
+            TrustedScriptURLOrUSVString::TrustedScriptURL(trusted_script_url) => {
+                Ok(trusted_script_url.to_string())
+            },
+        }
+    }
 }
 
 impl fmt::Display for TrustedScriptURL {