2017 年 04 月，学习总结 about demo HOT 3 OPEN

new webpack.HotModuleReplacementPlugin({
  multiStep: true
})

new webpack.HotModuleReplacementPlugin()

this.items[index] = newValue;

// Vue.set
Vue.set(this.items, index, newValue);

// Array.prototype.splice
this.items.splice(index, 1, newValue);

let methods = {};
Object.keys($parent).forEach(key => {
  const func = $parent[key];
  if (typeof(func) === 'function' && (func.name  === 'boundFn' || func.name === 'n')) {
    methods[key] = func;
  }
});

const component = new Vue({
  methods: methods,
  // ...
});

var isIE = function(ver) {
  var b = document.createElement('b');
  b.innerHTML = '<!--[if IE ' + ver + ']><i></i><![endif]-->';
  return b.getElementsByTagName('i').length === 1;
}

if (isIE(6)) {
  // IE 6
}

if (isIE(9)) {
  // IE 9
}