Function checkTerminalDirectives

06.Router/basic/js/vue.js:7374–7409

* Check an element for terminal directives in fixed order. * If it finds one, return a terminal link function. * * @param {Element} el * @param {Array} attrs * @param {Object} options * @return {Function} terminalLinkFn

(el, attrs, options)

   */

  function checkTerminalDirectives(el, attrs, options) {
    // skip v-pre
    if (getAttr(el, 'v-pre') !== null) {
      return skip;
    }
    // skip v-else block, but only if following v-if
    if (el.hasAttribute('v-else')) {
      var prev = el.previousElementSibling;
      if (prev && prev.hasAttribute('v-if')) {
        return skip;
      }
    }

    var attr, name, value, modifiers, matched, dirName, rawName, arg, def, termDef;
    for (var i = 0, j = attrs.length; i < j; i++) {
      attr = attrs[i];
      name = attr.name.replace(modifierRE, '');
      if (matched = name.match(dirAttrRE)) {
        def = resolveAsset(options, 'directives', matched[1]);
        if (def && def.terminal) {
          if (!termDef || (def.priority || DEFAULT_TERMINAL_PRIORITY) > termDef.priority) {
            termDef = def;
            rawName = attr.name;
            modifiers = parseModifiers(attr.name);
            value = attr.value;
            dirName = matched[1];
            arg = matched[2];
          }
        }
      }
    }

    if (termDef) {
      return makeTerminalNodeLinkFn(el, dirName, value, options, termDef, rawName, arg, modifiers);
    }
  }

  function skip() {}
  skip.terminal = true;