extra gutenberg block js

extra.js

wp.blocks.registerBlockType('my_new-block', {
  title: 'My Extra Block',
  icon: 'heart',
  category: 'common',
  attributes: {
    content: {type: 'string'}
  },
  edit: function(props) {
    function somename(event) {
      props.setAttributes({content: event.target.value})
    }

    return wp.element.createElement(
      "div",
      null,
      wp.element.createElement(
        "h3",
        null,
        "Enter your sample text"
      ),
      wp.element.createElement("input", { type: "text", value: props.attributes.content, onChange: somename })
    );
  },
  save: function(props) {
    return null
  }
})