Easy Way Use an arrow function: return ( <th value={column} onClick={() => this.handleSort(column)}>{column}</th> ); This will create a new function that calls handleSort with the right params. Better Way Extract it into a sub-component. The problem with using an arrow function in the render call is it will create a new function every time, which … Read more
What is wrong with this approach? Why would I want to use Redux Thunk or Redux Promise, as the documentation suggests? There is nothing wrong with this approach. It’s just inconvenient in a large application because you’ll have different components performing the same actions, you might want to debounce some actions, or keep some local … Read more
@Dhiraj’s answer is correct, and for convenience you can use the autoFocus prop to have an input automatically focus when mounted: <input autoFocus name=… Note that in jsx it’s autoFocus (capital F) unlike plain old html which is case-insensitive.
Introducing npx: an npm package runner NPM – Manages packages but doesn’t make life easy executing any.NPX – A tool for executing Node packages. NPX comes bundled with NPM version 5.2+ NPM by itself does not simply run any package. It doesn’t run any package as a matter of fact. If you want to run … Read more
Apparently, for certain attributes, React is intelligent enough to omit the attribute if the value you pass to it is not truthy. For example: const InputComponent = function() { const required = true; const disabled = false; return ( <input type=”text” disabled={disabled} required={required} /> ); } will result in: <input type=”text” required> Update: if anyone … Read more
ReactJS is a JavaScript library, supporting both front-end web and being run on a server, for building user interfaces and web applications. It follows the concept of reusable components. React Native is a mobile framework that makes use of the JavaScript engine available on the host, allowing you to build mobile applications for different platforms … Read more
You should add a key to each child as well as each element inside children. This way React can handle the minimal DOM change. In your code, each <TableRowItem key={item.id} data={item} columns={columnNames}/> is trying to render some children inside them without a key. Check this example. Try removing the key={i} from the <b></b> element inside … Read more
In class components, you can call this.forceUpdate() to force a rerender. Documentation: https://facebook.github.io/react/docs/component-api.html In function components, there’s no equivalent of forceUpdate, but you can contrive a way to force updates with the useState hook.
Server-side vs Client-side The first big thing to understand about this is that there are now 2 places where the URL is interpreted, whereas there used to be only 1 in ‘the old days’. In the past, when life was simple, some user sent a request for http://example.com/about to the server, which inspected the path … Read more
Redux author here! Redux is not that different from Flux. Overall it has same architecture, but Redux is able to cut some complexity corners by using functional composition where Flux uses callback registration. There is not a fundamental difference in Redux, but I find it makes certain abstractions easier, or at least possible to implement, … Read more