Vue/if

new Vue({
  el: '#sample',
  data: {
    select1: "",
    select2 : "",
    selectes2: [],
    woods : [
      "常緑樹",
      "落葉樹"
    ],
    names : [
      [
        "マツ",
        "モッコク",
        "ツバキ"
      ],
      [
        "イチョウ",
        "ムクゲ",
        "カエデ"
      ]
    ]
  },
  methods : {
    selectFunc : function(){
      this.select2 = "";
      this.selectes2 = this.names[this.select1];
    }
  }
});