Function processKey

m3u8/vue.js:9961–9986

(el)

  }

  function processKey (el) {
    var exp = getBindingAttr(el, 'key');
    if (exp) {
      {
        if (el.tag === 'template') {
          warn$2(
            "<template> cannot be keyed. Place the key on real elements instead.",
            getRawBindingAttr(el, 'key')
          );
        }
        if (el.for) {
          var iterator = el.iterator2 || el.iterator1;
          var parent = el.parent;
          if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
            warn$2(
              "Do not use v-for index as key on <transition-group> children, " +
              "this is the same as not using keys.",
              getRawBindingAttr(el, 'key'),
              true /* tip */
            );
          }
        }
      }
      el.key = exp;
    }
  }

  function processRef (el) {
    var ref = getBindingAttr(el, 'ref');