to an external USB drive which I use for my Time Machine backups and for external storage Time Machine. log ( "Hello" ) setTimeout ( ( ) => delayedGreeting ( ) console. external-diskmacbook prosleep-waketime-machine. The standard way of creating a delay in JavaScript is to use its setTimeout method. Now that we have a better understanding of JavaScript’s execution model, let’s have a look at how JavaScript handles delays and asynchronous operations. In the below script, replace CapsLock with the key you want to press and Shift with the target key you want it to act like. For example, you can make the CapsLock key act like Shift. You Might Not Actually Need a JS Sleep Function In case of damaged or unused keys, you can remap them to act like any other key. If any of this is news to you, you should watch this excellent conference talk: What the heck is the event loop anyway?. Rather, it will continue on its way, output “Hello!” to the console, then when the request returns a couple of hundred milliseconds later, it will output the number of repos. It will not, however, wait for the request to complete. Screams if some filesystem can't be unmounted. The following script does the following: Automatically unmounts the relevant filesystems and power off the Ultrabay when the Ultrabay eject lever is released. It will take 10 seconds before you get control back in Terminal. Now create the below ultrabay-eject script Script for Ultrabay eject. Type in the following command into Terminal.app: sleep 10. The JavaScript interpreter will encounter the fetch command and dispatch the request. If you don't terminate a shell-command with an ampersand, then AppleScript will wait for the command to finish before proceeding. This is because fetching data from an API is an asynchronous operation in JavaScript. If you run this code, it will output “Hello!” to the screen, then the number of public repos attributed to my GitHub account. Execution goes from top to bottom.Ĭontrast that with the equivalent JavaScript version: fetch ( '' ). ![]() It then parses the response, outputs the number of public repos attributed to my GitHub account and finally prints “Hello!” to the screen. The passed parameters include the USB device name. The USB events are triggered as devices are added and removed. ![]() The volume name and path is supplied to any scripts EventScripts executes. get (uri ) )Īs one might expect, this code makes a request to the GitHub API to fetch my user data. Volume, USB & Time Machine Events The volume events are triggered before and after OS X mounts an external volume or server. Understanding JavaScript’s Execution Modelīefore we get going, it’s important to make sure we understand JavaScript’s execution model correctly.Ĭonsider the following Ruby code: require 'net/http' require 'json'
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