java-mall-app/unpackage/dist/dev/mp-weixin/components/verify-code/imgcode.wxml

<view class="canvas-img-code"><canvas style="{{'width:'+(width+'px')+';'+('height:'+(height+'px')+';')}}" canvas-id="imgcanvas" data-event-opts="{{[['error',[['canvasIdErrorCallback',['$event']]]]]}}" binderror="__e"></canvas></view>