1 files changed, 17 insertions, 6 deletions
diff --git a/components/script/dom/htmlprogresselement.rs b/components/script/dom/htmlprogresselement.rs
index 62f05a5c7db..a4c39f3e9ec 100644
--- a/components/script/dom/htmlprogresselement.rs
+++ b/components/script/dom/htmlprogresselement.rs
@@ -10,6 +10,7 @@ use crate::dom::bindings::codegen::Bindings::HTMLProgressElementBinding::HTMLPro
 use crate::dom::bindings::inheritance::Castable;
 use crate::dom::bindings::num::Finite;
 use crate::dom::bindings::root::{DomRoot, MutNullableDom};
+use crate::dom::bindings::str::DOMString;
 use crate::dom::document::Document;
 use crate::dom::element::Element;
 use crate::dom::htmlelement::HTMLElement;
@@ -75,11 +76,15 @@ impl HTMLProgressElementMethods for HTMLProgressElement {
             })
     }
 
-    // https://html.spec.whatwg.org/multipage/#dom-progress-value
+    /// <https://html.spec.whatwg.org/multipage/#dom-progress-value>
     fn SetValue(&self, new_val: Finite<f64>) {
-        if 0.0 <= *new_val {
+        if *new_val >= 0.0 {
+            let mut string_value = DOMString::from_string((*new_val).to_string());
+
+            string_value.set_best_representation_of_the_floating_point_number();
+
             self.upcast::<Element>()
-                .set_string_attribute(&local_name!("value"), (*new_val).to_string().into());
+                .set_string_attribute(&local_name!("value"), string_value);
         }
     }
 
@@ -100,10 +105,16 @@ impl HTMLProgressElementMethods for HTMLProgressElement {
             })
     }
 
-    // https://html.spec.whatwg.org/multipage/#dom-progress-max
+    /// <https://html.spec.whatwg.org/multipage/#dom-progress-max>
     fn SetMax(&self, new_val: Finite<f64>) {
-        self.upcast::<Element>()
-            .set_string_attribute(&local_name!("max"), (*new_val).to_string().into());
+        if *new_val > 0.0 {
+            let mut string_value = DOMString::from_string((*new_val).to_string());
+
+            string_value.set_best_representation_of_the_floating_point_number();
+
+            self.upcast::<Element>()
+                .set_string_attribute(&local_name!("max"), string_value);
+        }
     }
 
     // https://html.spec.whatwg.org/multipage/#dom-progress-position