Method connectedCallback

app/javascript/elements/fetch_form.js:2–12

()

export default class extends HTMLElement {
  connectedCallback () {
    this.form.addEventListener('submit', (e) => {
      e.preventDefault()

      this.submit()
    })

    if (this.dataset.onload === 'true') {
      this.form.querySelector('button').click()
    }
  }

  submit () {
    fetch(this.form.action, {