微信小程序报错：Component is not found in path "components/comp/comp.js"

完整错误#

jsEnginScriptError:
Component is not found in path "components/comp/comp.js" (using by pages/index/index); onAppRoute
Error: Component is not found in path "components/comp/comp.js" (using by pages/index/index)
	in e(...)
	...

错误代码（json）#

{
  "backgroundTextStyle": "light",
  "navigationBarBackgroundColor": "#fff",
  "navigationBarTitleText": "WeApp",
  "navigationBarTextStyle": "black",
  "usingComponents": {
    "MyComp": "../../components/comp/comp.js"
  }
}

解决

去掉.js, 改为../../components/comp/comp：

{
  "backgroundTextStyle": "light",
  "navigationBarBackgroundColor": "#fff",
  "navigationBarTitleText": "WeApp",
  "navigationBarTextStyle": "black",
  "usingComponents": {
    "MyComp": "../../components/comp/comp"
}