Simple Embedding

You can create a form with the simple JSON schema as follows.

<link
  rel="stylesheet"
  href="https://cdn.jsdelivr.net/npm/bootstrap-icons/font/bootstrap-icons.css"
/>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap/dist/css/bootstrap.min.css" />
<script src="https://cdn.form.io/js/formio.embed.js"></script>
<div id="formio"></div>
Formio.createForm(document.getElementById('formio'), {
  components: [
    {
      type: 'textfield',
      key: 'firstName',
      label: 'First Name',
      placeholder: 'Enter your first name.',
      input: true,
      tooltip: 'Enter your <strong>First Name</strong>',
      description: 'Enter your <strong>First Name</strong>',
    },
    {
      type: 'textfield',
      key: 'lastName',
      label: 'Last Name',
      placeholder: 'Enter your last name',
      input: true,
      tooltip: 'Enter your <strong>Last Name</strong>',
      description: 'Enter your <strong>Last Name</strong>',
    },
    {
      type: 'select',
      label: 'Favorite Things',
      key: 'favoriteThings',
      placeholder: 'These are a few of your favorite things...',
      data: {
        values: [
          {
            value: 'raindropsOnRoses',
            label: 'Raindrops on roses',
          },
          {
            value: 'whiskersOnKittens',
            label: 'Whiskers on Kittens',
          },
          {
            value: 'brightCopperKettles',
            label: 'Bright Copper Kettles',
          },
          {
            value: 'warmWoolenMittens',
            label: 'Warm Woolen Mittens',
          },
        ],
      },
      dataSrc: 'values',
      template: '<span>{{ item.label }}</span>',
      multiple: true,
      input: true,
    },
    {
      type: 'button',
      action: 'submit',
      label: 'Submit',
      theme: 'primary',
    },
  ],
}).then(function (form) {
  form.on('submit', function (submission) {
    console.log(submission);
  });
});

Result