How we can call the external javascript inside a Visualforce page?

Hi Mohit,

You can use the below tag to include the external script on Vf Pages:-

<apex:includescript value=”The Url of the specified script”/>

In case if you also want to include external StyleSheet in Vf Page you can use the tag given below:-

<apex:stylesheet value=”The URL of the specified stylesheet” />.

Hope that helps.

Thanks.