Why is this an issue?
React components often render HTML elements, and developers can pass various props (properties) to these elements. However, React has its own set
of supported properties and attributes, and it’s essential to avoid using unknown or invalid properties when working with such elements to prevent
unexpected behavior at runtime.
The rule reports any instances where you are using a property or attribute that is not recognized by React or the HTML element you are
rendering.
How to fix it
Replace any unknown property or attribute with a known one, or add it to the list of exceptions.
Code examples
Noncompliant code example
class Welcome extends React.Component {
render() {
return <div class="hello">Hello, World!</div>; // Noncompliant: 'class' is a reserved keyword in JavaScript
}
}
Compliant solution
class Welcome extends React.Component {
render() {
return <div className="hello">Hello, World!</div>;
}
}
Noncompliant code example
const Image = <img source={myImage} />; // Noncompliant: The 'img' tag does not recognize any 'source' attribute
Compliant solution
const Image = <img src={myImage} />;
Resources
Documentation
