The Vibration API is an API specifically made for mobile devices as they are thankfully the only devices that have a vibrate function. The API allows developers to vibrate a device (in a pattern) for a given duration.
| Device | Support |
|---|---|
| iOS Safari | NO |
| Opera Mini | NO |
| IE | NO |
| BlackBerry | NO |
| Android Browser | Since Android 4.4 |
| Opera | Yes! |
| Chrome | Yes! |
| Chrome for Android | Yes! |
| Firefox | Yes! |
| Your Browser |
The vibration API is implemented in navigator.vibrate. So calling the function makes your phone vibrate. You can test if your browser is recent enough to have the vibrate function in navigator.
Mozilla had their own implementation mozVibrate so some browsers may support that instead.
var canVibrate = "vibrate" in navigator || "mozVibrate" in navigator;
if (canVibrate && !("vibrate" in navigator))
navigator.vibrate = navigator.mozVibrate;
However, this doesn't mean that your device can vibrate. Just that it's recent enough. There are a few requirements you need to meet.
The navigator.vibrate function either accepts a number or an array of numbers.
In the following example the device will vibrate for 1000 milliseconds (ms):
// vibrate for 1000 ms
navigator.vibrate(1000);
// or alternatively
navigator.vibrate([1000]);
The vibration pattern is formed by milliseconds of duration of the vibration and the duration of the waiting period.
In this example the devices will vibrate for 1000 ms, wait 500 ms and vibrate again.
// device will vibrate wait vibrate
navigator.vibrate([1000, 500, 1000]);
Any new call stops the previous vibration sequence. If the page is no longer visible, like locking the device, minimizing the window, moving to another tab then the vibration also stops.
In this example the devices will stop vibrating.
// Stop vibrating
navigator.vibrate();
navigator.vibrate(0);
navigator.vibrate([]);
We can keep vibrating until the user stops touching the device. The vibration stops after a while though. But it's not meant to be pressed infinitely anyway.
In this example the device will keep vibrating until the touch event has stopped
var isMobile = (/iPhone|iPod|iPad|Android|BlackBerry/).test(navigator.userAgent);
$(".button").on(isMobile ? 'touchstart' : 'mousedown', function(e) {
navigator.vibrate(Infinity); // Infinity is a number
});
$(".button").on(isMobile ? 'touchend' : 'mouseup', function(e) {
navigator.vibrate(0);
});
The best use case I can imagine for this API is for buttons. You get a little haptic feedback like you get for native apps. This can be done by setting the vibration to a very low number. For me 50ms seems ideal.
In this example all buttons and links on this page vibrate on tap. We also detect if the device is mobile and use touchend.
var isMobile = (/iPhone|iPod|iPad|Android|BlackBerry/).test(navigator.userAgent);
$(".button, a").on(isMobile ? 'touchend' : 'click', function(e) {
navigator.vibrate(50);
});
Vibrating after clicking a sliding checkbox is also very helpful. It feels really natural. There is a short vibration at the start, then a period of waiting whilst the checkbox is moving and then a longer vibration at the end.
In this example, the checkbox will vibrate.
<div class="ui slider checkbox">
<input id="product-1" type="checkbox">
<label for="product-1">Duvel</label>
</div>
<div class="ui slider checkbox">
<input id="product-2" type="checkbox">
<label for="product-2">Jupiler</label>
</div>
$(".ui.checkbox").click(function() {
navigator.vibrate([5, 200, 20]);
});
If you're not sure how long the haptic feedback should be. You can experiment with various timespans. Try all of these buttons out a mobile device. Anything above 100ms seems to long for me.
In this example the following buttons vibrate each on a different timespan.
Another great use case are for notifications. These can be a bit longer than haptic feedback. Patterns can also be used to differentiate.
Please be aware of the vibration notification on the phone and try not to replicate them as to not to confuse the user. Some visual feedback together with the vibration would be ideal.
Click the buttons below. When the progress bar reaches the end. You get a notification! Each button is a different vibration pattern.
// Vibrate on completion
var pattern = [500, 100, 500];
$(".progress .bar")
.css({width: "0%"})
.animate({width: "100%"}, {
duration: 1000,
complete: function() {
if (canVibrate) navigator.vibrate(pattern);
}
});
If doing it manually seems difficult for you, I've written a jquery plugin that can get you started right away.
Download and embed the code then initialize in one of the following ways.
// Vibration for 50ms on all .button on click
$(".button").vibrate();
// Vibrate for 20ms on click
$(".button").vibrate("short");
// Vibrate for 50ms on click
$(".button").vibrate("medium");
$(".button").vibrate("default");
$(".button").vibrate(50);
// Vibrate for 100ms on click
$(".button").vibrate("long");
// Vibrate for 1000ms on touchstart. Stop vibrating on touchend.
$(".button").vibrate({
duration: 1000,
trigger: "touchstart"
});
Groggie mentioned his blog post on using the Vibration API for music and theme songs. It's a really cool example of what can be done using the Vibration API and some creative thought. Click on the titles below to play.
navigator.vibrate([125,75,125,275,200,275,125,75,125,275,200,600,200,600]);
navigator.vibrate([200,100,200,275,425,100,200,100,200,275,425,100,75,25,75,125,75,25,75,125,100,100]);
navigator.vibrate([500,110,500,110,450,110,200,110,170,40,450,110,200,110,170,40,500]);
navigator.vibrate([100,30,100,30,100,200,200,30,200,30,200,200,100,30,100,30,100]);
Here are some other links to get you some inspiration:
I also made a slideshow: Learn About The Vibration API from Illyism. Feel free to share it and show it around.