I got the answer..
In we-retail project, they are including some clientLibs in "customheaderlibs.html" so we have to include that clientLibs in our project also. We-retail using these lines:
<sly data-sly-use.clientLib="/libs/granite/sightly/templates/clientlib.html"
data-sly-call="${clientlib.all @ categories='we-retail.dependencies'}"/>
<sly data-sly-use.clientLib="/libs/granite/sightly/templates/clientlib.html"
data-sly-call="${clientlib.css @ categories='we-retail.base'}"/>
If we will add these clientLib in our page component that will work fine.