no-component-will-update

Full Name in eslint-plugin-react-x

react-x/no-component-will-update

Full Name in @eslint-react/eslint-plugin

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

Features

🔄

Presets

x recommended recommended-typescript recommended-type-checked strict strict-typescript strict-type-checked

Rule Details

This API was renamed from componentWillUpdate to UNSAFE_componentWillUpdate. The old name is deprecated. In a future major version of React, only the new name will work.

Examples

Using the legacy lifecycle method name in class components

React has renamed componentWillUpdate to UNSAFE_componentWillUpdate. The old name will no longer work in future versions.

import React from "react";

// Problem: Continuing to use the deprecated componentWillUpdate
class MyComponent extends React.Component {
  componentWillUpdate() {
    // ...
  }
}

import React from "react";

// Recommended: Use UNSAFE_componentWillUpdate instead
class MyComponent extends React.Component {
  UNSAFE_componentWillUpdate() {
    // ...
  }
}

Versions

Resources

• Rule Source
• Test Source
• Rule Changelog

Further Reading

• React Docs: UNSAFE_componentWillUpdate
• Legacy React APIs: componentWillUpdate
• React Docs: Updating to Async Rendering
• React Docs: How to migrate to a function component