Detailed explanation of two ways to dynamically change CSS styles in react

import React, { Component, Fragment } from 'react';
import './style.css';
class Demo extends Component{
    constructor(props) {
        super(props);
        this.state = {
            display: true
        }
        this.handleshow = this.handleshow.bind(this)
        this.handlehide = this.handlehide.bind(this)
    }
    render() {
        return (
            <Fragment>
                {/*Dynamically add a class to change the style*/}
                <p className={this.state.display?"active":"active1"}>You are my only one</p>
                <button onClick={this.handlehide}>Click to hide</button>
                <button onClick={this.handleshow}>Click to show</button>
            </Fragment>
        )
    }
    handleshow() {
        this.setState({
            display:true
        })
    }
    handlehide() {
        this.setState({
            display:false
        })
    }
}
export default Demo;

 .active{
      display: block;
  }
  .active1{
    display: none;
  }

import React, { Component, Fragment } from 'react';
class Demo extends Component{
    constructor(props) {
        super(props);
        this.state = {
            display2: true
        }
        this.handleshow2 = this.handleshow2.bind(this)
        this.handlehide2 = this.handlehide2.bind(this)
    }
    render() {
        const display2 = {
            display:this.state.display2 ? 'block' : 'none'
        }
        return (
            <Fragment>
                 {/*Dynamically add a style to change the style*/}
                 <p style={display2}>You are my only one</p>
                <button onClick={this.handlehide2}>Click to hide 2</button>
                <button onClick={this.handleshow2}>Click to show 2</button>
            </Fragment>
        )
    }
    handleshow2() {
        this.setState({
            display2:true
        })
    }
    handlehide2() {
        this.setState({
            display2:false
        })
    }
}
export default Demo;