components

ReactJS difference between stateful and stateless

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Yes, that is sort of the difference. Except with the stateful component you can also change the state, using this.setState for example: var React = require(‘react’); var Header = React.createClass({ getInitialState: function() { return { imageSource: “mypicture.png” }; }, changeImage: function() { this.setState({imageSource: “differentpicture.png”}); }, render: function() { return( <img src={this.state.imageSource} onClick={this.changeImage.bind(this)} /> ); } … Read more

When to use Standalone Components or Modules in Angular 14?

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Standalone components are not mandatory and will never be, there is no rule when to use them. However, Angular Architects recommend to always use Standalone components at least for new components you create. They are simply more treeshakeable and less boiler. You can mix standalone components and modules also. For the mentioned recommendation of the … Read more

How to Two-way Data Binding Between Parents and grandchildren in Vue.js

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There are several ways of doing it, and some are mentioned in other answers: Use props on components Use v-model attribute Use the sync modifier (for Vue 2.0) Use v-model arguments (for Vue 3.0) Use Pinia Here are some details to the methods that are available: 1.) Use props on components Props should ideally only … Read more

How to map an array of objects in React

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What you need is to map your array of objects and remember that every item will be an object, so that you will use for instance dot notation to take the values of the object. In your component [ { name: ‘Sam’, email: ‘somewhere@gmail.com’ }, { name: ‘Ash’, email: ‘something@gmail.com’ } ].map((anObjectMapped, index) => { … Read more

When to use which constructor for ComponentName in Android?

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The ComponentName constructor taking two Strings can be used to refer to a component in another application. But, the first argument is not the package name of the class; it is the package name of the application—the package attribute of the manifest element in that application’s AndroidManifest.xml. So your first example should be ComponentName cn … Read more

Angular4 Components inheritance with abstract class

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Update for Angular 10+ As of Angular 10, when using the IVY compiler, components that are inherited, and which contain Angular functionality, must be decorated with an empty @Directive() decorator. Read more about it here There’s no need to add @Component() annotations to abstract classes or register them to any module. It could be that … Read more

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