React Higher Order Component forces re-render of wrapped component

Question

I am struggling to understand how to correctly implement this validation behaviour in a higher order component.

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EDIT: TLDR: Thanks to user @noa-dev 's excellent suggestion I have created a React Fiddle here: https://jsfiddle.net/8nLumb74/1/ to show the issue.

Simply put: Why does my textbox lose focus on editing when wrapped by this HOC?

What am I doing wrong?

The Textbox component:

import React from 'react'

export default React.createClass({
    changeText(e) {
        if (this.props.validate)
            this.props.validate(e.target.value)
        this.props.update(e.target.value)
    },
    componentDidMount() {
        console.log('should only be fired once')
    },
    render() {
        return (<input type="text"
            value={this.props.text}
            onChange={this.changeText} />)
    }
})

The Validator component:

import React from 'react'

export default function (WrappedComponent) {
    const Validation = React.createClass({
        validate(text) {
            console.log('validating', text)
        },
        render() {
            return (
                <WrappedComponent
                {...this.props}
                validate={this.validate}
                />
            )
        }
    })
    return Validation
}

The parent Form component:

import React from 'react'
import TextBox from './text-box'
import Validator from './validator'

export default React.createClass({
    getInitialState() {
        return ({text: 'oh hai'})
    },
    update(text) {
        this.setState({text})
    },
    render() {
        const ValidatingTextBox = Validator(TextBox)
        return (<ValidatingTextBox
            text={this.state.text}
            update={this.update} />)
    }
})

Answer 1

In the render method of the Form component, you are creating a new ValidatingTextBox every time:

    render() {
        const ValidatingTextBox = Validator(TextBox)
        return (<ValidatingTextBox
            text={this.state.text}
            update={this.update} />)
    }

Instead, you should make the component and then use it so the instance gets maintained. A possible Form component would look like:

import React from 'react'
import TextBox from './text-box'
import Validator from './validator'

const ValidatingTextBox = Validator(TextBox) 

export default React.createClass({
    getInitialState() {
        return ({text: 'oh hai'})
    },
    update(text) {
        this.setState({text})
    },
    render() {
        return (<ValidatingTextBox
            text={this.state.text}
            update={this.update} />)
    }
})