API response do not return date for some events

I have Events API on my website, some of the events do not return/display date – there is an empty string(?).
Is there any way to replace it with “Check website” sting in case if it’s empty?

my code:

.fetch(url)

.then((response) => response.json())
    .then((response) => {
      let data = response.data;
      let html = "";
      data.forEach((item) => {
html += `
      <div class="card" style="width: 18rem;">
      <img src=${item.image} alt="img" class="images">
      <div class="card-body">
        <h5 class="name">${item.name}</h5>
        <p class="city">${item.location.address.addressLocality} - ${
          item.location.name
        }</p>
        <p class="date">Date: ${item.startDate.slice(
          0,
          -14
        )} ${item.startDate.slice(11, -8)} </p>
        <a href="${
          item.location.sameAs
        }" target="_blank" class="btn btn-outline-danger">More Info</a>
      </div>
    </div>
      `;
  document.getElementById("root").innerHTML = html;
    });

Checked google and nothing helped me.