Is it good to use setState() in componentWillMount() method?

**Historical Context:**
While it was technically safe to use `setState()` inside `componentWillMount()`, this lifecycle method is now deprecated and removed because:
- It caused issues with server-side rendering
- Created confusion about the right place for async operations
- Was problematic with React's concurrent rendering features

**Modern Alternative:**
Use `componentDidMount()` for side effects and async initialization in class components:

    componentDidMount() {
      axios.get(`api/todos`)
        .then((result) => {
          this.setState({
            messages: [...result.data]
          })
        })
    }