ScriptAttribute fix (#6750)

* Added guard around attribute assignment. Exposes attrToValue as static method

* linting fixes

src/framework/script/script-attributes.js

@@ -180,13 +180,18 @@ function attributeToValue(app, schema, value, current) {
  */
 export function assignAttributesToScript(app, attributeSchemaMap, data, script) {
 
+    if (!data) return;
+
     // Iterate over the schema and assign corresponding data
     for (const attributeName in attributeSchemaMap) {
         const attributeSchema = attributeSchemaMap[attributeName];
         const dataToAssign = data[attributeName];
 
+        // Skip if the data is not defined
+        if (dataToAssign === undefined) continue;
+
         // Assign the value to the script based on the attribute schema
-        script[attributeName] =  attributeToValue(app, attributeSchema, dataToAssign, script);
+        script[attributeName] =  attributeToValue(app, attributeSchema, dataToAssign, script[attributeName]);
     }
 }
 
@@ -200,6 +205,8 @@ export function assignAttributesToScript(app, attributeSchemaMap, data, script)
 class ScriptAttributes {
     static assignAttributesToScript = assignAttributesToScript;
 
+    static attributeToValue = attributeToValue;
+
     /**
      * Create a new ScriptAttributes instance.
      *