小程序如何获取多个formId实现详解

<form bindsubmit="formSubmit" report-submit class="layout">
 <button formType="submit" class="button" hover-class="none">
  <view class="fixed"><slot></slot></view>
 </button>
</form>

.layout {
  display: inline-block;
  padding-left: 0;
  padding-right: 0;
  box-sizing: border-box;
  font-size: inherit;
  text-align: left;
  text-decoration: none;
  line-height: inherit;
  -webkit-tap-highlight-color: transparent;
  color: inherit;
  width: 100%;
  position: relative;
}
.layout .button{
  display: inline-block;
  padding-left: 0;
  padding-right: 0;
  box-sizing: border-box;
  font-size: inherit;
  text-align: left;
  text-decoration: none;
  line-height: inherit;
  -webkit-tap-highlight-color: #000;
  color: inherit;
  width: 100%;
  position: relative;
}
.layout .button .fixed{
  position:relative;
  z-index: 9999;
  width: 100%;
}
.layout .button:before,.layout .button:after{
  border-width: 0;
}

Component({
 methods: {
  formSubmit: function (e) {
   let formId = e.detail.formId
   console.log(formId)
  }
 }
})

{
 "component": true
}

"usingComponents": {
  "layout": "/components/layout/index"
 }

<layout>
 <view class="container">
  ...
 </view>
</layout>