dropdown with react js code example

Example 1: axios js and react

import React from 'react';

import axios from 'axios';

export default class PersonList extends React.Component {
  state = {
    persons: []
  }

  componentDidMount() {
    axios.get(`https://jsonplaceholder.typicode.com/users`)
      .then(res => {
        const persons = res.data;
        this.setState({ persons });
      })
  }

  render() {
    return (
      <ul>
        { this.state.persons.map(person => <li>{person.name}</li>)}
      </ul>
    )
  }
}

Example 2: button in vanilla js

let newButton = document.createElement('button');
newButton.setAttribute("id", "myNewButton");
newButton.className = "myClassName";
newButton.innerText = "clickMe";
newButton.addEventListener("click", clickMe);
document.body.appendChild(newButton);
function clickMe(){
    console.log("Hi! I  am a new Button.");
}