When the Slack app opens, it receives the URL that was used to open it.

Like with Slack, you can tell the operating system that you want to handle a custom scheme. For example, when you get a Magic Link email from Slack, the Launch Slack button is an anchor tag with an href that looks something like: slack://secret/magic-login/other-secret. Like using the mailto scheme, it's possible to link to other applications by using custom url schemes. Read more about built-in URL schemes below. Similarly, there are schemes for making phone calls and sending SMS. When you open a link with the mailto scheme, your operating system will open an installed mail application. In addition to https, you're likely also familiar with the mailto scheme. It’s a powerful tool that has a lot of usage potential.Linking gives you a general interface to interact with both incoming and outgoing app links.Įvery Link (URL) has a URL Scheme, some websites are prefixed with or and the http is the URL Scheme. We’ve used the open trick on numerous occasions with a variety of tips, whether just opening a GUI app, to launch multiple instances of a single app, and even to open the present working directory in Finder from the command line. The open utility comes from Mac OS X’s ancestral NextStep roots and offers the ability to launch files and GUI apps from the command line. That may be different down the road, but for now that’s the way it’s done in all versions of OS X. Remember that you can change the Mac default web browser at any time by using Safari Preferences – yes, you use Safari to change the OS X browser even if you have no intention on using Safari and want to set something like Chrome or Firefox as the default.

You can also use https and even specify port numbers:īe sure to include or or it will look for a local file instead, while also offering a suggestion that you made an error: “Perhaps you meant ‘’?” You can try this with any URL, even complex URL strings, although long query strings are best when placed into quotations.

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