Using URL object from extension

[xtal256]

I am writing some code for an extension, and I would like to get the hostname part of a URL. The easiest way to do this is to construct a new URL object then access the hostname property. However, when I do that I get an error that "URL" is not defined. Does this object not exist in the scope of XUL extensions?

[vannilla]

I'm not sure about the state of URL in extensions, but you can use nsIURI if you don't have to do anything special that requires specifically the URL class.

Code: Select all

const IOService = Components.classes['@mozilla.org/network/io-service;1'].getService(Components.interfaces.nsIIOService);
const myURI = IOService.newURI('https://example.org', null, null);

[Moonchild]

If you insist you could use a Web API in a XUL extension but that would be a kludge at best. XUL extensions have access to native interfaces for a reason; depending on what exactly you want to do, nsIURI, the window mediator or browser object may be best suited.
https://duckduckgo.com/?t=palemoonsp&q= ... XUL&ia=web has a few starting points for those.

[xtal256]

Ok thanks, I will use nsIURI.

[Moonchild]

A more specialized version of it is nsIURL

[moonbat]

Code: Select all

const IOService = Components.classes['@mozilla.org/network/io-service;1'].getService(Components.interfaces.nsIIOService);
const myURI = IOService.newURI('https://example.org', null, null);

Far easier and performance wise better to import Services.jsm and use the exposed cached service from there instead of directly accessing the service classes, like so:

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Components.utils.import("resource://gre/modules/Services.jsm");
const myURI = Services.io.newURI('https://example.org', null, null);

Lots of additional services are cached by this module and you can refer to them above.
You will find most of the XUL documentation there at the main site from that link as well.