static-cms/src/components/Widgets/NumberControl.js

import React, { PropTypes } from 'react';

export default class NumberControl extends React.Component {
  handleChange = (e) => {
    const valueType = this.props.field.get('valueType');
    const { onChange } = this.props;
    if(valueType === 'int') {
      onChange(parseInt(e.target.value, 10));
    } else if(valueType === 'float') {
      onChange(parseFloat(e.target.value));
    } else {
      onChange(e.target.value);
    }
  };

  render() {
    const { field, value, forID } = this.props;
    const min = field.get('min', '');
    const max = field.get('max', '');
    const step = field.get('step', field.get('valueType') === 'int' ? 1 : '');
    return <input
      type="number"
      id={forID}
      value={value || ''}
      step={step}
      min={min}
      max={max}
      onChange={this.handleChange}
    />;
  }
}

NumberControl.propTypes = {
  onChange: PropTypes.func.isRequired,
  value: PropTypes.node,
  forID: PropTypes.string,
  valueType: PropTypes.string,
  step: PropTypes.number,
  min: PropTypes.number,
  max: PropTypes.number,
};