Function genChildren

static/vuejs/vue.common.js:8745–8759

(el, checkSkip)

}

function genChildren (el, checkSkip) {
  var children = el.children;
  if (children.length) {
    var el$1 = children[0];
    // optimize single v-for
    if (children.length === 1 &&
        el$1.for &&
        el$1.tag !== 'template' &&
        el$1.tag !== 'slot') {
      return genElement(el$1)
    }
    var normalizationType = checkSkip ? getNormalizationType(children) : 0;
    return ("[" + (children.map(genNode).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
  }
}

// determine the normalization needed for the children array.
// 0: no normalization needed