main-source

var post = [
  {
    type: "plain",
    content: {
      title: "Main",
      description: "Maybe this is work?"
    }
  }
];

function newpost(id) {
  var type = post[id].type;
  var content = post[id].content;

  if (type == "plain") {
    var new_post = document.createElement("DIV");
    new_post.setAttribute("class","post type-plain");
    document.getElementsByClassName("workspace")[0].appendChild(new_post);

    var pcontent1 = document.createElement("H3");
    pcontent1.innerHTML = content.title;
    new_post.appendChild(pcontent1);

    var pcontent2 = document.createElement("P");
    pcontent2.innerHTML = content.description;
    new_post.appendChild(pcontent2);
  }
}

newpost(0);