Netlify CMS base64 encode widget

encodeWidget.js

var EncodeControl = createClass({
  handleChange: function (e) {
    this.props.onChange(btoa(e.target.value.trim()))
  },

  render: function () {
    var value = this.props.value ? atob(this.props.value) : ''
    return h('input', {
      type: 'text',
      value: value,
      onChange: this.handleChange,
      className: 'nc-controlPane-widget'
    })
  }
})

CMS.registerWidget('encode', EncodeControl)