Let's Start with API Call in ReactJS application. Every Reactjs application which wants to fetch data or send data to the server needs to integrate APIs. There are various lifecycle methods and it has been a topic of discussion if a component wants to integrate API, what is the right location?
There are various lifecycle methods to React and knowing about lifecycle methods will help you in becoming a better Reactjs developer.
Generally, there are two kinds of API call integration in any client-side Application:
- When the user demands :
This kind of API call is requested by the user on various events like click, scroll, drag & drop, etc. E.g the submission of forms and load more options. This kind of API calls has dedicated event functions and APIs are called from there.
- When the component loads :
In many scenarios, it is required that we want to get some data as soon as the component is loaded. E.g. Consider the component which shows a list of items, in this case, you need to call GET API automatically as soon as the component is loaded on the browser.
How to Call React API :
After the props and states are defined, the realm of lifecycle methods starts. Hence, these two methods are the most eligible candidates, where the APIs can be called:
- ComponentWillMount / UNSAFE_componentWillMount
1). ComponentWillMount / UNSAFE_componentWillMount
If you are seeing UNSAFE_ for the first time, let me tell you in React v16.3.0 released, it has been announced that
componentWillMount will only work until version 17 and UNSAFE_ will be prefixed to allow gradual migration.
This method is the right place to integrate the API as by this time the render method has been called once.
If our component is rendered on the server, the APIs will not be called twice, once because on server-side componentDidMount will not be called. Hence the API will be called only once in the client.
Why It is Best for Front End Development :
Let’s see why React is better than any other library or framework for frontend development as well as how to indicate the value of its advantages in the project life cycle to the fullest extent:
Simple to figure out :
Modular nature :
The React library was initially created for building web solutions based on the components that are gradually surrounded by more complex structures. This approach allows developers to form separate module blocks that, further on, could be very easily modernized and used in other projects. Moreover, it provides a wholesome representation of the whole project, i.e., all connections between separate components are defined along with their development, not at the beginning or finish of working on the project (which can be quite cumbersome when there is a large number of separate files and classes to deal with).
The simplicity of code testing :
The module nature of code not only significantly increases the speed of development. Reusing the existing code allows avoiding plenty of errors in new projects. If you repeatedly use initially efficiently designed components, you’ll need to write less code and just use them to build a new user interface. The less new code you need, the lesser are the chances of new errors appearing. You’ve already gone through them and tested everything while working with a real project, which means that when bugs appear in the code, it’ll be easier to define their origins.
The simplicity of code optimization :
A component-oriented approach to the creation of React-based solutions provides developers with an ability to easily customize the existing components, turning the software development process into a constant enhancement process. The components that were already created during some other project's life cycle don’t have additional dependencies. In this sense, nothing gets in the way of using them again for other projects, gradually optimizing them according to the changing client requirements and implicit UX requirements.
The propensity for creating dynamic web pages :
The creation of interactive elements and dynamic content is the forte of the library in the discussion. The thing is: standard tools and technologies, like the JS + HTML + CSS combination, don’t allow for creating something interactive and dynamic without sacrificing performance. For instance, the visual part of the HTML code, called DOM (Document Object Model - a tree of objects), is usually redrawn each time a user makes certain changes within the page (e.g. scrolls it down). The redrawing operation is quite resourced intensive if it isn’t optimized the right way. In the case of ReactJS, instead of regular DOM, its lightweight copy—Virtual DOM—is used. It doesn’t redraw the whole tree from scratch, only the nodes that were changed. As a result, from the user perspective, we get an almost immediate reaction to any manipulations.
Why Reactjs :
Reactjs is so accessible in use and so flexible in a performance that it becomes hard to overestimate all the benefits that website and app creators receive from it. You can also experience the great powers of React. Contact us and order a ReactJS-based project.