new Vue({
  el: '.app',
  data: {
    options: ['不限', '咸的', '酸的', '辣的'],
    selects: ['不限']
  },
  methods: {
    check: function(o){
      if(o === '不限'){
      	this.selects = ['不限']
      }else {
        if(this.selects.indexOf(o) !== -1){
          if(this.selects.indexOf('不限') !== -1){
        		this.selects.splice(this.selects.indexOf('不限'), 1)
        	}
        }else{
          if(this.selects.length === 0){
          	this.selects = ['不限']
          }  
        }
      }
    }
  }
})