How to get input value during onSubmit event?

Question

JavaScript

Can you tell me how to get input values?
Here, of course, an incorrect assignment occurs, because event refers to the form, and not to the input.
const payload = event.target.value
Full code:

import React from 'react'
import Input from '../../UI/Input/Input';
import Button from '../../UI/Button/Button';
import classes from './Main.module.css'

export default class Main extends React.Component {

  submitHandler = (event) => {
    event.preventDefault()
    const {getValueInput} = this.props
    const payload = event.target.value
    getValueInput(payload)
  }

  render() {

    return (
      <div className={classes.main}>
        <div className={classes.main_inner}>
          <div className={classes.form_outer}>
            <form onSubmit={this.submitHandler}>
              <Input />
              <Button>Добавить</Button>
            </form>
          </div>
        </div>
      </div>
    )
  }
}

Answer 1

If I understand you correctly, then:
Add state,

state = {
        inputEntry: '',
    }

in submitHandlerreplace const payload = event.target.valuewith const payload = this.state.inputEntry
and add a new handler to the input

handleInputChange = (e) => {
        this.setState({inputEntry: e.target.value})
    };

Answer 2

RedirectMatch ^(.*?)/link1$ http://vash-site.ru/$1/link2

Answer 3

In your case, the regular season cannot be compiled because the minimum number of elements in it is to list stupidly all domains (msk|spb|uk|kz), and so on.
Or, for example, like this,
(.+[^/]) one or more characters but not a slash (that is, select everything up to the first slash)

RedirectMatch ^(.+[^/])/link1$ http://vash-site.ru/$1/link2