初始化

yunbainian/etms_wechat_mini/components/icon/icon.json

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+{
+  "component": true,
+  "usingComponents": {}
+}

yunbainian/etms_wechat_mini/components/icon/icon.wxml

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+<wxs module="utils">
+    var double = function(a) {
+        return 2*a
+    };
+    var ifSpecialIcon = function(v) {
+      return v === 'arrow' || v === 'back'
+    }
+    module.exports = {
+      double: double,
+      ifSpecialIcon: ifSpecialIcon
+    }
+</wxs>
+
+<view class="{{extClass}} weui-icon" style="background:{{color}};width:{{size}}px;height:{{ utils.ifSpecialIcon(icon) ? utils.double(size) : size}}px;mask-image:url({{src}});-webkit-mask-image:url({{src}});-moz-mask-image:url({{src}})"></view>

yunbainian/etms_wechat_mini/components/icon/icon.wxss

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+.weui-icon{vertical-align:middle;display:inline-block;background:black;mask-repeat:no-repeat;-webkit-mask-repeat:no-repeat;-moz-mask-repeat:no-repeat;mask-size:cover;-webkit-mask-size:cover;-moz-mask-size:cover}