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HTML 

              
                #app
  .block_area
    .block(v-for="(b,bid) in blocks",
           :class="{circle: b.type==1,cross: b.type==-1}",
           @click="player_go(b)")
      .small_num {{bid+1}}
  ul.debug_list
    li(v-for="wdata in pattern_data") {{wdata.pattern}}: {{wdata.value}}
    
  br
  h1 {{who_win}}
  .block.turn_block(:class="{circle: turn==1,cross: turn==-1}",
         @click="player_go(b)")
  .btn(v-if="who_win.length!=0",
       @click="restart") Restart
!

CSS 

              
                $color_blue: #46f
$color_red: #f35
$block_size: 100px

@mixin size($w,$h:$w)
  width: $w
  height: $h
  
html,body,#app
  display: flex
  justify-content: center
  align-items: center
  background-color: #111
  flex-direction: column
  color: white
  +size(100%)

.block_area
  display: flex
  flex-wrap: wrap
  +size($block_size*3)
  
//每一個方塊
.block
  +size($block_size)
  box-sizing: border-box
  padding: 20px
  // border: solid 1px
  position: relative
  cursor: pointer
  border: solid 1px #333
  transition: 0.5s
  
  &:hover
    background-color: rgba(white,0.05)
  
  &.none
    &:before,&:after
      +size(0)

  &:before,&:after
    content: ""
    transition: 0.5s
    transform-origin: center center
    position: absolute
    transform: translate(-50%,-50%)
    left: 50%
    top: 50%
  
  &.circle
    &:before
      +size(90%)
      background-color: $color_red
      border-radius: 50%
    &:after
      +size(60%)
      background-color: #111
      border-radius: 50%

  &.cross
    &:after,&:before
      +size(90%,15%)
      background-color: $color_blue
      border-radius: 0px
    &:before
      transform: translate(-50%,-50%) rotate(135deg)
    &:after
      transform: translate(-50%,-50%) rotate(45deg)
  
.btn
  font-size: 30px
  border-bottom: solid 4px white
  cursor: pointer
  position: fixed
  left: 50%
  bottom: 30px
  transform: translateX(-50%)
  &:hover
    color: #eee
  
.debug_list
  position: absolute
  right: 10px
  top: 10px
  list-style: none
  padding: 0
  opacity: 0.4
  
.small_num 
  opacity: 0.2 
  
.turn_block
  +size(40px)
!

JS 

              
                var vm = new Vue({
  el: "#app",
  data: {
    blocks: [],
    turn: -1
  },
  mounted(){
    this.restart()
  },
  methods: {
    player_go(block){
      // if (block.type==0){
        block.type=this.turn
        this.turn=-this.turn
      // }else{
      //   alert("Block has value!")
      // }
    },
    restart(){
      this.blocks=Array.from({length: 9},()=>({
        type: 0
      }))
    }
  },
  computed:{
    pattern_data(){
      var verify_list = "123,456,789,147,258,369,159,357"
      var results=
        verify_list.split(",")
          .map((vtext)=>{
            var result= this.blocks
            .filter((d,i)=>vtext.indexOf(i+1)!=-1)
            .map(o=>o.type)
            .reduce((a,b)=>(a+b),0)
            return {pattern: vtext,value: result}
          })
          ;
      return results
    },
    who_win(){
      var results= this.pattern_data.filter(o=>Math.abs(o.value)==3)
      if (results.length>0){
        return (results[0].value>0?"O":"X") + " Wins!"
      }else{
        return "Player:"
      }
      
      return results
    }
  }
})
!
999px

Console