Sending messages from file system html page to a chrome extension

问题

I'm new to creating chrome extensions. I want to test sending messages from a web page to an extension as described here: https://developer.chrome.com/extensions/messaging#external-webpage.

I'd like to just use an html file in my file system, like "file:///C:/Users/johng/Documents/TestExtensionCall.html", to do the initial testing but the developer documentation indicates that you need to include "externally_connectable" in your extension manifest to expose the messaging api and the url pattern must include a second-level domain.

Can an html file from the file system be used to test sending messages from a web page to a chrome extension? Do I actually need to use a web page from a web site to do the testing?

Thanks, John

回答1:

For testing externally_connectable, you have¹ to use a web server.

Though, you can still use a local development web server. Normally, it would have a localhost hostname, but you can specify an alias for it in your DNS hosts file, say, my.localhost, and it would satisfy Chrome's requirements.

See here for more information about the hosts file.

¹To the best of my knowledge

来源：https://stackoverflow.com/questions/24835565/sending-messages-from-file-system-html-page-to-a-chrome-extension