A major key factor for creating a positive user experience is speed. The time that a user has to wait to first see content from your website or application matters.
Amazon reports a 1% sales loss for every 100ms load time, and Walmart reports a +2% conversion per one second load time improvement.
A decrease in user satisfaction can eventually lose customers. The solution to mitigating this is to properly optimize your application. Which you can attain with much ease by taking the professional help of our website development in Kochi.
React allows us to build those encapsulated components that will manage their state and then compose them to make complex UIs.
These components essentially make up small parts of our UI. It is a fact that a lot of times we unintentionally create redundant components and structure our code that impacts the overall loading time of our application.
The solution is optimization and doing the best way to write a particular code block, function, or component to achieve reusability and thereby reduce the time taken to return information.
We can optimize our components to ensure fast and efficient load times in our applications with the help of some inbuilt APIs like React.Component, React.PureComponent and life-cycle methods that React offers.
The components are typically composed of CSS, JS, and HTML code. If you can determine when certain pieces will show up can help to create a great impact on your page speed.
There are various optimization methods that use these inbuilt APIs, lifecycle methods, and some other general techniques that ensure you improve your React code.
How to use React.Fragment to avoid adding extra nodes to the DOM
You will need to return multiple elements like a table list to a group of related texts at some point in your application. By using a linter you will be able to see the error: JSX parent expressions must have one parent element and you will be forced to wrap both elements in a parent element aka div.
Though everything works fine, an extra unnecessary div is created in this case. This leads to so many useless elements created around our application and causes invalid HTML in some cases where the render data comes from a child component.
This was never your intended output as it is an invalid HTML syntax. Fragment has the solution for you. The column component can be rewritten.
The result is that you get the intended output and even better with no extra DOM nodes being created. This can seem small but in reality the more elements on a page the more time it will take to load.
Hence, auditing pieces of your code and updating them to use fragments to group data where necessary improves your code and its performance.
Find out more about fragments by getting in touch with our mobile application development company in Cochin.
Use React. Suspense and React.Lazy to load components declaratively
As your aim is to load parts of your app only when they are requested, lazy loading is a popular optimization technique that can speed up the load time of applications.
For instance, loading shopping cart data only when the cart icon is clicked or loading images at the bottom of a long image list when the user scrolls to that point, etc are all related examples.
React. Lazy helps to load components only on demand and thereby reduces the load time of our application as only the needed pieces will be present as requested.
It can be used easily without hassle with its simple syntax. It takes a callback function as a parameter that will load the component’s file using the dynamic import() syntax.
Use React Suspense
A small-time lag will occur leaving a screen freeze experience for your user during the time the component will be swapped in. React. Suspense is used to give the user update or feedback on the outcome of the process.
React. Suspense is used to wrap lazy components and show fallback content while loading the component.
Whenever the component is being loaded and there’s a delay a fallback text loading. . will be rendered.
Prevent unnecessary re-rendering with shouldComponentUpdate()
Most times in the application there are instances of one component present on the screen. For example, on a blog page, there might be different blog posts that show up via a blog post component, and that in turn also renders like button components. But, If this is not properly managed, a change in the state of a button component will cause all of the button components to re-render.
The solution to this is the shouldComponentUpdate method.
shouldComponentUpdate() lets React know if a component’s output is not affected by the current change in state or props. By default, it re-renders on every state change and always returns a boolean as a response if the component should re-render or not. The default is that it always returns true.
If the next prop hasn’t changed there’s no need to change the appearance of the component by re-rendering.
This may not be a huge improvement, however, in an application with so many components re-rendering shouldComponentUpdate will help improve performance.
Do you need assistance to perform these in a professional and effective manner? Do get in touch with our agency for mobile app development in Kerala.
The tips discussed here are the major ones, though there are lots of ways and tools that can be used to optimize an application.
Getting in touch with our marketing automation company in Kochi can help you in strategising and implementing the tools that will work for you.
Optimizing applications is essential because in some simple scenarios optimizing your components might be a killer.
The size and complexity of your project matter, to know whether it would be used for just demo or simple use cases or would be deployed to be used every day by people.
Got questions or know other efficient ways to optimize applications? Let’s talk!