rebase to handle JsString

Author: sendilkumarn

src/js.rs

@@ -249,14 +249,14 @@ extern {
     ///
     /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toFixed
     #[wasm_bindgen(catch, method, js_name = toFixed)]
-    pub fn to_fixed(this: &Number, digits: u8) -> Result<String, JsValue>;
+    pub fn to_fixed(this: &Number, digits: u8) -> Result<JsString, JsValue>;
 
     /// The toExponential() method returns a string representing the Number
     /// object in exponential notation.
     ///
     /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toExponential
     #[wasm_bindgen(catch, method, js_name = toExponential)]
-    pub fn to_exponential(this: &Number, fraction_digits: u8) -> Result<String, JsValue>;
+    pub fn to_exponential(this: &Number, fraction_digits: u8) -> Result<JsString, JsValue>;
 
     /// The toString() method returns a string representing the
     /// specified Number object.

tests/all/js_globals/Number.rs

@@ -138,11 +138,11 @@ fn to_fixed() {
             use wasm_bindgen::js;
 
             #[wasm_bindgen]
-            pub fn to_fixed(this: &js::Number, digits: u8) -> String {
+            pub fn to_fixed(this: &js::Number, digits: u8) -> js::JsString {
                 let result = this.to_fixed(digits);
                 let result = match result {
                     Ok(num) => num,
-                    Err(_err) => "RangeError".to_string()
+                    Err(_err) => "RangeError".into()
                 };
                 result
             }
@@ -170,11 +170,11 @@ fn to_exponential() {
             use wasm_bindgen::js;
 
             #[wasm_bindgen]
-            pub fn to_exponential(this: &js::Number, fraction_digits: u8) -> String {
+            pub fn to_exponential(this: &js::Number, fraction_digits: u8) -> js::JsString {
                 let result = this.to_exponential(fraction_digits);
                 let result = match result {
                     Ok(num) => num,
-                    Err(_err) => "RangeError".to_string()
+                    Err(_err) => "RangeError".into()
                 };
                 result
             }