Function updateDOMProps

static/vuejs/vue.esm.js:5914–5955

(oldVnode, vnode)

/*  */

function updateDOMProps (oldVnode, vnode) {
  if (!oldVnode.data.domProps && !vnode.data.domProps) {
    return
  }
  var key, cur;
  var elm = vnode.elm;
  var oldProps = oldVnode.data.domProps || {};
  var props = vnode.data.domProps || {};
  // clone observed objects, as the user probably wants to mutate it
  if (props.__ob__) {
    props = vnode.data.domProps = extend({}, props);
  }

  for (key in oldProps) {
    if (props[key] == null) {
      elm[key] = '';
    }
  }
  for (key in props) {
    cur = props[key];
    // ignore children if the node has textContent or innerHTML,
    // as these will throw away existing DOM nodes and cause removal errors
    // on subsequent patches (#3360)
    if (key === 'textContent' || key === 'innerHTML') {
      if (vnode.children) { vnode.children.length = 0; }
      if (cur === oldProps[key]) { continue }
    }

    if (key === 'value') {
      // store value as _value as well since
      // non-string values will be stringified
      elm._value = cur;
      // avoid resetting cursor position when value is the same
      var strCur = cur == null ? '' : String(cur);
      if (shouldUpdateValue(elm, vnode, strCur)) {
        elm.value = strCur;
      }
    } else {
      elm[key] = cur;
    }
  }
}

// check platforms/web/util/attrs.js acceptValue