Security News
ESLint is Now Language-Agnostic: Linting JSON, Markdown, and Beyond
ESLint has added JSON and Markdown linting support with new officially-supported plugins, expanding its versatility beyond JavaScript.
Inferno is a fast, lightweight, and highly performant JavaScript library for building modern user interfaces. It is similar to React in terms of API and functionality but is optimized for speed and performance.
Component Creation
Inferno allows you to create components using a class-based approach similar to React. This example demonstrates how to create a simple component that renders a 'Hello, Inferno!' message.
const { Component } = require('inferno');
class MyComponent extends Component {
render() {
return <div>Hello, Inferno!</div>;
}
}
module.exports = MyComponent;
JSX Support
Inferno supports JSX syntax, which allows you to write HTML-like code within your JavaScript. This example shows how to use JSX to create a simple component.
const Inferno = require('inferno');
const MyComponent = () => (
<div>
<h1>Welcome to Inferno</h1>
<p>This is a JSX example.</p>
</div>
);
module.exports = MyComponent;
State Management
Inferno provides state management capabilities similar to React. This example demonstrates a simple counter component that increments the count when a button is clicked.
const { Component } = require('inferno');
class Counter extends Component {
constructor(props) {
super(props);
this.state = { count: 0 };
}
increment = () => {
this.setState({ count: this.state.count + 1 });
};
render() {
return (
<div>
<p>Count: {this.state.count}</p>
<button onClick={this.increment}>Increment</button>
</div>
);
}
}
module.exports = Counter;
Lifecycle Methods
Inferno supports lifecycle methods that allow you to hook into different stages of a component's lifecycle. This example demonstrates the use of `componentDidMount` and `componentWillUnmount` lifecycle methods.
const { Component } = require('inferno');
class LifecycleDemo extends Component {
componentDidMount() {
console.log('Component mounted');
}
componentWillUnmount() {
console.log('Component will unmount');
}
render() {
return <div>Check the console for lifecycle logs.</div>;
}
}
module.exports = LifecycleDemo;
React is a popular JavaScript library for building user interfaces, developed by Facebook. It offers a similar component-based architecture and lifecycle methods as Inferno but is more widely adopted and has a larger ecosystem.
Preact is a fast 3kB alternative to React with the same modern API. It is similar to Inferno in terms of performance and size but has a slightly different approach to handling components and state.
Vue.js is a progressive JavaScript framework for building user interfaces. It offers a more opinionated approach compared to Inferno and includes features like directives and a built-in state management system.
Inferno is a lightweight isomorphic framework for building shockingly performant user interfaces. Unlike typical virtual DOM libraries like React, Mitrhil, Cycle and Om, Inferno does not rely on diffing DOM virtual elements, but instead it differentiates static content from dynamic content and only diffs the values that change within a given fragment of virtual DOM elements (we call them virtual fragments).
In addition to this, we've painstakingly optimized the code to make sure that there is as little overhead as possible. We believe that Inferno is currently the fastest vDOM implementation on out there - as shown by some of our benchmarks. Inferno is all about performance, whilst keeping a robust API that replicates the best features from libraries such as React.
In principle, Inferno is compatible with the standard React API, allowing for painless transition from React to Inferno in most use cases. Furthermore Inferno has a Babel plugin allowing JSX syntax to transpile to optimised Inferno templates.
To be more technically correct, Inferno is a "virtual fragment" framework, which provides the same flexibility as a Virtual DOM does, but with a much smaller memory footprint and greater performance.
npm install --save inferno
npm run test:browser // browser tests
npm run test:server // node tests
npm run test // browser and node tests
npm run build
npm run lint:source // lint the source
Let's start with some code. As you can see, Inferno intentionally keeps the same good (in our opinion) design ideas regarding components, one-way data passing and separation of concerns. In these examples, JSX is used via the Inferno JSX Babel Plugin to provide a very easy way to express virtual fragments.
const message = "Hello world";
Inferno.render(
<MyComponent message={ message } />,
document.getElementById("app")
)
Furthermore, Inferno also uses ES6 components like React:
class Component extends Inferno.Component {
constructor(props) {
super(props);
this.state = {
counter: 0
}
}
render() {
return (
<div>
<h1>Header!</h1>
<span>Counter is at: { this.state.counter }</span>
</div>
)
}
}
Inferno.render(<Component />, document.body);
The real difference between React and Inferno is the performance offered at run-time. Inferno can handle large, complex DOM models without breaking a sweat. This is essential for low-power devices such as tablets and phones, where users of those devices are quickly demanding desktop like performance on their slower hardware.
// TODO
Stateful component:
class MyComponent extends Component {
render() {
...
}
}
This is the base class for Inferno Components when they're defined using ES6 classes.
Stateless component:
const MyComponent => ({ name, age }) =>
<span>My name is: { name } and my age is: {age}</span>
);
Stateless components are first-class functions where their only argument is the props
passed through from their parent.
Inferno.render(<div />, document.body);
Render a fragment into the DOM in the supplied container and return a reference to the component. If the fragment was previously rendered into container, this will perform an update on it and only mutate the DOM as necessary to reflect the latest Inferno component.
Inferno.renderToString(<MyComponent />);
[Note: currently in development]
Render a fragment to its initial HTML. This should only be used on the server. Inferno will return an HTML string.
const template = Inferno.createTemplate(() => ({
tag: 'div',
attrs: { className: 'test'},
children: [
'This', ' is ', 'a test!'
]
}));
Inferno.render(template(), document.body);
class BasicComponent extends Inferno.Component {
render() {
const template = Inferno.createTemplate((name, title) =>
TemplateFactory("div", {
className: "basic"
},
TemplateFactory("span", {
className: name
}, "The title is ", title)
)
);
return template(this.props.name, this.props.title);
}
}
const template = Inferno.createTemplate((Component, title) =>
TemplateFactory('div', null,
TemplateFactory(Component, {
title: title,
name: "basic-render"
})
)
);
Inferno.render(template(BasicComponent, 'abc'), container);
Inferno.TemplateFactory is hyperscript function that works the same way as React.creactElement(). It's first argument is the node, second argument is the attributes and the third and last argument is it's children.
const divRef = Inferno.createRef();
Inferno.render(<div ref={ divRef } />, document.body);
divRef.element.textContent = 'Modifying the DOM node directly!';
Creates a mutable object that links an Inferno rendered template node to its real DOM node upon being mounted to the DOM.
Inferno tries to address two problems with creating UI components:
Writing code should be fun. Browsers are getting more advanced and the technologies being supported are growing by the week. It's about time a framework offered more fun without compromising performance.
Inferno has it's own JSX Babel plugin.
Inferno is still under development, and there are some missing features and optimizations to be made.The high priority now is the server side rendring (SSR).
FAQs
An extremely fast, React-like JavaScript library for building modern user interfaces
The npm package inferno receives a total of 113,685 weekly downloads. As such, inferno popularity was classified as popular.
We found that inferno demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
ESLint has added JSON and Markdown linting support with new officially-supported plugins, expanding its versatility beyond JavaScript.
Security News
Members Hub is conducting large-scale campaigns to artificially boost Discord server metrics, undermining community trust and platform integrity.
Security News
NIST has failed to meet its self-imposed deadline of clearing the NVD's backlog by the end of the fiscal year. Meanwhile, CVE's awaiting analysis have increased by 33% since June.