What patterns drive UI behavior based on the type of content?

Question

What patterns drive UI behavior based on the type of content?

My web page is designed for editing various types of products, each with different behaviors depending on their product type.

The variations in behavior include minor changes such as: a specific field being mandatory only for one product type, a dropdown list having fewer options for certain product types, an ajax call being made to a different URL, and more.

1/ I am looking for an elegant way to write JavaScript code that follows the open-closed principle and avoids using conditional statements like:

var idType = $('#idtype').val();
if (idType == 3)

2/ Can enums be utilized in JavaScript?

3/ Is there a particular design pattern that addresses this situation? The Strategy pattern seems like the closest fit.

4/ While these changes can currently be handled on the client-side using JavaScript, how should I approach modeling cases where the behavior differs between client-side and server-side?

javascript asp.net design-patterns

Answer 1

Answer №1

To implement different behaviors based on a variable value, you can use a switch statement like the example below.

While native mode may not be available, you can create a simulation. Here's an example:

var MyEnum = {
    LittleBall: 1,
    MediumBall: 2,
    BigBall: 3
};

var idType = parseInt($("#idtype").val(), 10);

switch(idType) {
    case MyEnum.LittleBall:
        // perform actions for this case
        break;
    case MyEnum.MediumBall:
        // perform actions for this case
        break;
    case MyEnum.BigBall:
        // perform actions for this case
        break;
    default:
        break;
}

Could you provide more details about what you mean by patterns?
It's important to ensure that your client-side behavior aligns with your server-side logic.

Answer 2

To implement different behaviors based on a variable value, you can use a switch statement like the example below.

While native mode may not be available, you can create a simulation. Here's an example:

var MyEnum = {
    LittleBall: 1,
    MediumBall: 2,
    BigBall: 3
};

var idType = parseInt($("#idtype").val(), 10);

switch(idType) {
    case MyEnum.LittleBall:
        // perform actions for this case
        break;
    case MyEnum.MediumBall:
        // perform actions for this case
        break;
    case MyEnum.BigBall:
        // perform actions for this case
        break;
    default:
        break;
}

Could you provide more details about what you mean by patterns?
It's important to ensure that your client-side behavior aligns with your server-side logic.

Answer 3

Answer №2

One of the main reasons for inheritance is to streamline code organization. By grouping common functionalities in a base class like Product, you can create specialized versions such as ThatProductWithFewerOptions and ThatProductWithMandatoryField. Simply override any methods that need customization for each specific product type. Utilize a lookup table to map IDs to corresponding product constructors, falling back on the generic Product when necessary. This approach eliminates the need for lengthy conditional statements and allows for cleaner code execution.

Alternatively, centralize the logic differences on the server-side using classes to avoid redundant implementations. With Node.js, the same codebase can be utilized for both client and server interactions, maximizing efficiency and maintainability.

For those familiar with design patterns, this approach resembles the Factory pattern, where you dynamically create instances based on certain criteria (e.g., Product.getInstanceFor(idType)).

Answer 4

One of the main reasons for inheritance is to streamline code organization. By grouping common functionalities in a base class like Product, you can create specialized versions such as ThatProductWithFewerOptions and ThatProductWithMandatoryField. Simply override any methods that need customization for each specific product type. Utilize a lookup table to map IDs to corresponding product constructors, falling back on the generic Product when necessary. This approach eliminates the need for lengthy conditional statements and allows for cleaner code execution.

Alternatively, centralize the logic differences on the server-side using classes to avoid redundant implementations. With Node.js, the same codebase can be utilized for both client and server interactions, maximizing efficiency and maintainability.

For those familiar with design patterns, this approach resembles the Factory pattern, where you dynamically create instances based on certain criteria (e.g., Product.getInstanceFor(idType)).

What patterns drive UI behavior based on the type of content?

Answer №1

Answer №2

Similar questions

Angular 4 - The Promising Outcome: How to Retrieve the Value upon Completion

Ways to verify the data type of a column in a table

Tips for troubleshooting in Chrome when working with the webpack, ReactJS, and Babel combination

What could be causing my JavaScript try/catch block to not trigger?

The Jquery Datatable fails to display the accurate number of rows based on the selections made in the dropdown

Netbeans lacks compatibility with JavaScript

What could be causing all components on the page to re-render/update in React?

Steps for adding data to an object property within a mongodb document:

Adjust the Vue.js required property to allow null values but not undefined

Differences between visibility property manipulation in HTML and JS

Enhancing the AngularJS Login feature for server authentication

Having trouble updating state following a fetch request in React Native

Webpack resolve.alias is not properly identified by Typescript

Is your Node.js asynchronous parallel function not performing as expected?

Unsupported server component type: undefined in Next.js version 13 is not recognized by the server

Unleashing the Power of Aurelia's HTML Attribute Binding

Assign a value of null to SynchronizationContext rather than utilizing ConfigureAwait(false)

Trouble arises when jquery's "position().top" clashes with the CSS3 property "transform: scale()"

Experiencing difficulties with extracting information from mySQL for my web development assignment

Configuring the Simple Membership provider to utilize a MongoDB connection