Function insert

static/vuejs/vue.common.js:4711–4719

(parent, elm, ref)

  }

  function insert (parent, elm, ref) {
    if (isDef(parent)) {
      if (isDef(ref)) {
        nodeOps.insertBefore(parent, elm, ref);
      } else {
        nodeOps.appendChild(parent, elm);
      }
    }
  }

  function createChildren (vnode, children, insertedVnodeQueue) {
    if (Array.isArray(children)) {