SOURCE

function Point(x, y) {
  this.x = x;
  this.y = y;
}
Point.prototype.move = function(x, y) {
  this.x += x;
  this.y += y;
}
var type = new Vue({
  el: '#table',
  data: {
    bg: 'red',
    md: ['typeof','Object.prototype.toString','constructor.name','instanceof'],
    gd: [
      {
        t: undefined,
        n: 'undefined'
      },
      {
      	t: null, 
      	n: 'null'
      },
      {
      	t: true,
      	n: 'boolean'
      },
      {
      	t: 1,
      	n: 'number'
      },
      {
      	t: 'string',
      	n: 'string'
      },
      {
      	t: {},
      	n: 'object'
      },
      {
      	t: Symbol(),
      	n: 'Symbol()'
      },
  		{
  			t: new Boolean(),
  			n: Boolean
			},
      {
  			t: new Number(),
  			n: Number
			},
			{
  			t: new String(),
  			n: String
			},
      {
  			t: new Array(),
  			n: Array
			},
      {
  			t: new Object(),
  			n: Object
			},
      {
  			t: new Function(),
  			n: Function
			},
      {
  			t: new Date(),
  			n: Date
			},
			{
  			t: new Error(),
  			n: Error
			},
      {
  			t: new RegExp(),
  			n: RegExp
			},
			{
  			t: new Point(1,2),
  			n: Point
			}
    ]
  }
})

<h1>JavaScript类型判断</h1>
<table id="table">
  <tr>
    <th>数据类型\判断方式</th>
    <th v-for="(m,i) in md">{{ m }}</th>
  </tr>
  <tr v-for="(o,i) in gd">
    <td>{{ o.t ? (i > 6 && i < 16 ?  Object.prototype.toString.call(o.t).split('[')[1].replace(']','()').replace('object', 'new ') : i < 7 ? o.n : 'new Point(1,2)') : o.n }}</td>
    <td :class="[(i !== 1 && i < 7) || i === 12 ? '' : bg]">{{ typeof o.t }}</td>
    <td :class="[i < 16 ? '' : bg]">{{ Object.prototype.toString.call(o.t) }}</td>
    <td :class="[o.t ? '' : bg]">{{ o.t ? o.t.constructor.name : 'x' }}</td>
    <td :class="[i>6 ? '' : bg]">{{ i>6 ? (o.t instanceof o.n) : 'x' }}</td>
  </tr>
  <tr>
    <td>总结</td>
    <td>不能判断null<br />不能区分具体引用类型(Function除外)</td>
    <td>不能判断自定义对象</td>
    <td>不可判断undefined与null</td>
    <td>不可判断原始类型</td>
  </tr>
</table>
<h3>封装函数</h3>
<pre>
  <code>
    function typeOf(o) {
      if(typeof o === 'undefined') return 'Undefined'
      if(Object.prototype.toString.call(o) === '[object Null]') return 'Null'
      return o.constructor.name
    }
  </code>
</pre>

body {
  text-align: center
}
table {
  width: 100%
}
td {
  color: #fff;
  background-color: green
}
.red {
  background-color: red
}
pre {
  text-align: left;
  background-color: #000;
  color: #fff
}