![]() ES6 and greater will work within the class component, but convention is to keep these methods in ES5 context. ![]() How does it differ?Īs an aside, you may notice that the lifecycle methods and render method are in ES5 context. Take a look at how we displayed information before when App was a functional component. Class components need a render method in order to display their content. On line 12, we have our lifecycle method. This is where we will place those images that we have fetched within our component. We put an empty array within our state object named, ‘photos’, on line 8. Then we added a constructor and super on lines 5–6, signifiers of the class components, as well as a state on line 7. It should all be working! We can tell by going over to localhost and make sure, but let’s dive into some concepts here.įirst, we imported Component from within React to access some lifestyle methods. Make sure that your new component looks a little something like this: In order to have access to these methods, we must make it a class component. As currently constructed, our App is a functional component. For example, the componentDidMount lifecycle method runs after the component has mounted, whereas the componentDidUpdate lifecycle method will run when the component has updated. What is important to know is that these methods with run at specific times within a component’s lifecycle. A lifecycle method, like so many other things, is super cool, but a bit beyond the scope of this lesson. We want to make a fetch call inside of a lifecycle method. The server will send back the info and then we can display it. Now, we need to make a fetch call to get some information so that we may display it on the page.Ī fetch call is the code telling the server that it needs specific information and where that information is located. We have reached the point where we need to go beyond what is just provided by React. Let’s go into the index.js file within the src directory. A public directory that includes images and our root HTML sheet. Some json files, package and package-lock, that are also beyond the scope of this entry, but worth examining if you are unfamiliar with them. What do we have? A whole lot of node modules that are beyond the scope of this entry. Open the file up in your text editor and explore a little. Go to the terminal and type: cd fetch-photos This will create a folder within that file path named, “fetch-photos”. This feature is available with react-scripts2.0. ![]() Don’t forget the curly braces in the import The ReactComponent import name is significant and tells Create React App that you want a React component that renders an SVG rather than its filename. Let’s go to the desired file path within the terminal and type: npm init react-app fetch-photos This is handy if you don’t want to load the SVG as a separate file. React bundles an application for us right out of the box. This tutorial will be done using React.įirst things first, we will create a React application. The goal of this tutorial will be to provide an example template for how to fetch data from an API and display that data on the page in pictures. Fetch from an API and Display Some Pictures: React ![]()
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