A simple JS library that detects mobile devices in both the browser and Deno.
You might not need this library. In most cases, responsive design solves the problem of controlling how to render things across different screen sizes. I recommend a mobile first approach. But there are always edge cases. If you have an edge case, then this library might be for you.
My edge case at the time was redirecting users to a completely separate mobile site. I tried to keep this script small (currently ~1.3k bytes, minified) and simple, because it would need to execute in the <head>, which is generally a bad idea, since JS blocks the downloading and rendering of all assets while it parses and executes. In the case of mobile redirection, I don't mind so much, because I want to start the redirect as soon as possible, before the device has a chance to start downloading and rendering other stuff. For non-mobile platforms, the script should execute fast, so the browser can quickly get back to downloading and rendering.
isMobile runs quickly during initial page load to detect mobile devices; it then creates a JavaScript object with the results.
In a browser, the following properties of the global isMobile object will either be true or false. In Node, isMobile will be whatever you named the variable.
isMobile.apple.phoneisMobile.apple.ipodisMobile.apple.tabletisMobile.apple.universalisMobile.apple.device(any mobile Apple device)
isMobile.android.phoneisMobile.android.tabletisMobile.android.device(any mobile Android device; OkHttp user agents will match this)
isMobile.amazon.phoneisMobile.amazon.tabletisMobile.amazon.device(any mobile Amazon Silk device)
isMobile.windows.phoneisMobile.windows.tabletisMobile.windows.device(any mobile Windows device)
isMobile.other.blackberry_10isMobile.other.blackberryisMobile.other.opera(Opera Mini)isMobile.other.firefoxisMobile.other.chromeisMobile.other.device(any "Other" device)
isMobile.any- any device matchedisMobile.phone- any device in the 'phone' groups aboveisMobile.tablet- any device in the 'tablet' groups above
import isMobile from "https://code4fukui.github.io/isMobile/isMobile.js";
console.log(isMobile(window.navigator).any);Or pass in a window.navigator-shaped object that includes at least a userAgent property. To properly detect iPad on iOS 13, the object should also include the platform and maxTouchPoints properties.
// this is just an example. window.navigator is readonly in the browser
window.navigator = {
...
userAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15) AppleWebKit/605.1.15 (KHTML, like Gecko)',
platform: 'MacIntel',
maxTouchPoints: 2,
..
}This library uses Spotify's web-scripts project to build, lint, test, format and release the this library.
You must use yarn commit rather than git commit to commit files. This enforced commit messages to following a specific format and enables automation of release notes and version bump.