no-component-will-mount

Full Name in eslint-plugin-react-x

react-x/no-component-will-mount

Full Name in @eslint-react/eslint-plugin

@eslint-react/no-component-will-mount

Features

🔍 🔄

Presets

• core
• recommended
• recommended-typescript
• recommended-type-checked

What it does

Prevents usage of componentWillMount in class components.

This API has been renamed from componentWillMount to UNSAFE_componentWillMount. The old name has been deprecated. In a future major version of React, only the new name will work.

A safe codemod is available for this rule.

Examples

Failing

import React from "react";
 
interface MyComponentProps {
  name: string;
}
 
class MyComponent extends React.Component<MyComponentProps> {
  componentWillMount() {
    // ...
  }
}

Passing

import React from "react";
 
interface MyComponentProps {
  name: string;
}
 
class MyComponent extends React.Component<MyComponentProps> {
  UNSAFE_componentWillMount() {
    // ...
  }
}

Implementation

• Rule source
• Test source

Further Reading

• React: Legacy React APIs componentWillMount