wxml可以动态调用js

<!-- index.wxml -->
<button bindtap="handleClick">点击我</button>

// index.js
Page({
  handleClick: function() {
    console.log('按钮被点击了！');
  }
});

<!-- index.wxml -->
<view>{{formatDate(date)}}</view>
<wxs module="utils">
  var formatDate = function(date) {
    return date.toLocaleDateString();
  }
  module.exports.formatDate = formatDate;
</wxs>

// index.js
Page({
  data: {
    date: new Date()
  }
});

<!-- index.wxml -->
<wxs module="utils">
  var formatDate = function(dateStr) {
    var date = new Date(dateStr);
    return date.toLocaleDateString();
  }
  module.exports.formatDate = formatDate;
</wxs>
<view>{{utils.formatDate(dateStr)}}</view>

// index.js
Page({
  data: {
    dateStr: new Date().toISOString()
  }
});