Nathan Hunzaker
fe4a5b4004
* Only re-assign defaultValue if it is different * Do not set value if it is the same * Properly cover defaultValue * Use coercion to be smart about value assignment * Add explanation of loose type checks in value assignment. * Add test coverage for setAttribute update. * Only apply loose value check to text inputs * Fix case where empty switches to zero * Handle zero case in controlled input * Correct mistake with default value assignment after rebase * Do not assign bad input to number input * Only trigger number input value attribute updates on blur * Remove reference to LinkedValueUtils * Record new fiber tests * Add tests for blurred number input behavior * Replace onBlur wrapper with rule in ChangeEventPlugin * Sift down to only number inputs * Re-record fiber tests * Add test case for updating attribute on uncontrolled inputs. Make related correction * Handle uncontrolled inputs, integrate fiber * Reorder boolean to mitigate DOM checks * Only assign value if it is different * Add number input browser test fixtures During the course of the number input fix, we uncovered many edge cases. This commit adds browser test fixtures for each of those instances. * Address edge case preventing number precision lower than 1 place 0.0 coerces to 0, however they are not the same value when doing string comparision. This prevented controlled number inputs from inputing the characters `0.00`. Also adds test cases. * Accommodate lack of IE9 number input support IE9 does not support number inputs. Number inputs in IE9 fallback to traditional text inputs. This means that accessing `input.value` will report the raw text, rather than parsing a numeric value. This commit makes the ReactDOMInput wrapper check to see if the `type` prop has been configured to `"number"`. In those cases, it will perform a comparison based upon `parseFloat` instead of the raw input value. * Remove footnotes about IE exponent issues With the recent IE9 fix, IE properly inserts `e` when it produces an invalid number. * Address exception in IE9/10 ChangeEventPlugin blur event On blur, inputs have their values assigned. This is so that number inputs do not conduct unexpected behavior in Chrome/Safari. Unfortunately, there are cases where the target instance might be undefined in IE9/10, raising an exception. * Migrate over ReactDOMInput.js number input fixes to Fiber Also re-record tests * Update number fixtures to use latest components * Add number input test case for dashes and negative numbers * Replace trailing dash test case with replace with dash Also run prettier
React 
React is a JavaScript library for building user interfaces.
- Declarative: React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Declarative views make your code more predictable, simpler to understand, and easier to debug.
- Component-Based: Build encapsulated components that manage their own state, then compose them to make complex UIs. Since component logic is written in JavaScript instead of templates, you can easily pass rich data through your app and keep state out of the DOM.
- Learn Once, Write Anywhere: We don't make assumptions about the rest of your technology stack, so you can develop new features in React without rewriting existing code. React can also render on the server using Node and power mobile apps using React Native.
Learn how to use React in your own project.
Examples
We have several examples on the website. Here is the first one to get you started:
class HelloMessage extends React.Component {
render() {
return <div>Hello {this.props.name}</div>;
}
}
ReactDOM.render(
<HelloMessage name="John" />,
document.getElementById('container')
);
This example will render "Hello John" into a container on the page.
You'll notice that we used an HTML-like syntax; we call it JSX. JSX is not required to use React, but it makes code more readable, and writing it feels like writing HTML. We recommend using Babel with a React preset to convert JSX into native JavaScript for browsers to digest.
Installation
React is available as the react package on npm. It is also available on a CDN.
React is flexible and can be used in a variety of projects. You can create new apps with it, but you can also gradually introduce it into an existing codebase without doing a rewrite.
The recommended way to install React depends on your project. Here you can find short guides for the most common scenarios:
Contributing
The main purpose of this repository is to continue to evolve React core, making it faster and easier to use. If you're interested in helping with that, check out our contribution guide.
Code of Conduct
Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.
Good First Bug
To help you get your feet wet and get you familiar with our contribution process, we have a list of good first bugs that contain bugs which are fairly easy to fix. This is a great place to get started.
License
React is BSD licensed. We also provide an additional patent grant.
React documentation is Creative Commons licensed.
Examples provided in this repository and in the documentation are separately licensed.
Troubleshooting
See the Troubleshooting Guide