How do you declare a function in Ext JS?

Functions can be stored in variables, passed into other functions as arguments, passed out of functions as return values, and constructed at run-time. You can also have anonymous functions! coming back… someFunction = function() – In this case, you are storing a function in the variable ‘comeFunction’.

What is the Ext JS method to define a class?

Create an Object of a Class: JavaScript allows us to create an object using new keyword. create() method to create an object of a class which is created using Ext. define() method. The following example demonstrates creating an object of the Student class and calling getName() method.

What is EXT function?

Extension functions are a cool Kotlin feature that help you develop Android apps. They provide the ability to add new functionality to classes without having to inherit from them or to use design patterns like Decorator.

How do you declare global variables in Extjs?

To the right of the text box and the lock icon is an “Add” button. Click the “Add” button to add your global variable into the application.

How do you define Ext?

Ext. is the written abbreviation for extension when it is used to refer to a particular phone number.

What is namespace in Ext JS?

The Ext namespace (global object) encapsulates all classes, singletons, and utility methods provided by Sencha’s libraries. Also many frequently used methods from other classes are provided as shortcuts within the Ext namespace.

Which of the following is a higher order function?

For example, the map function on arrays is a higher order function. The map function takes a function as an argument. The map function is one of the many higher-order functions built into the language. sort, reduce, filter, forEach are other examples of higher-order functions built into the language.

What are the advantages of using ExtJS?

Pros

• ExtJS is like a superset of the widgets like simple label, textBox buttons to complex grids, drag-drop panel s etc.
• It has quite good documentation with tutorials, samples and user community.
• Active and currently most adopted javascript RIA framework.
• Good code quality/readability.

What is the use of Ext in Ext JS?

Ext is the namespace, which encapsulates all the classes in Ext JS. Defining a Class in Ext JS Ext provides more than 300 classes, which we can use for various functionalities. Ext.define () is used for defining the classes in Ext JS.

What is the use of callback function in Ext JS?

Callback function is optional. It is called when the class has loaded properly. As like other OOPS based languages, we can create objects in Ext JS as well. Following are the different ways of creating objects in Ext JS. Inheritance is the principle of using functionality defined in class A into class B.

What is an ext window?

The name of the property in the global namespace (The window in browser environments) which refers to the current instance of Ext. This is usually “Ext”, but if a sandboxed build of ExtJS is being used, this will be an alternative name.