.js
page({
data:{
isopen:true,
state:“开”
},
buttontap:function(){
if(this.data.isopen){
this.setData({
state:"关"
})
}else{
this.setData({
state:"开"
})
}
this.data.isopen = !this.data.isopen
}
})
.wxml
<button type="primary" bindtap="buttontap">{{state}}</button>