The "Apple Siri" wave replicated in pure Javascript using the Canvas API. To learn more about the project, read the blog post here, check the demo or codepen.

The classic, pre-iOS9 style.

The new fluorescent wave introduced in iOS9.

work in progress

The wave reinvented as a bubble.

Import the UMD package via the unpkg CDN and it's ready to use.

<script src="https://unpkg.com/siriwave/dist/siriwave.umd.min.js"></script>

Install it through npm install siriwave or npm add siriwave first:

import SiriWave from "siriwave";

Create a div container and instantiate a new SiriWave object:

<div id="siri-container"></div>
<script>
  var siriWave = new SiriWave({
    container: document.getElementById("siri-container"),
    width: 640,
    height: 200,
  });
</script>

Each wave chooses a random parameter for each of these ranges that factors into their creation. You can override these ranges by passing a ranges object to the constructor.

Here is the type of the ranges object:

export type IiOS9Ranges = {
  noOfCurves?: [number, number];
  amplitude?: [number, number];
  offset?: [number, number];
  width?: [number, number];
  speed?: [number, number];
  despawnTimeout?: [number, number];
};

By passing this argument, you're overriding the default curve definition resulting in a completely different style.

The default definition for the ios classic style is:

[
  { attenuation: -2, lineWidth: 1, opacity: 0.1 },
  { attenuation: -6, lineWidth: 1, opacity: 0.2 },
  { attenuation: 4, lineWidth: 1, opacity: 0.4 },
  { attenuation: 2, lineWidth: 1, opacity: 0.6 },
  { attenuation: 1, lineWidth: 1.5, opacity: 1 },
];

and it results in 5 different sin-waves with different parameters and amplitude.

You can set 4 attributes for each curve:

• attenuation: the power factor determining the attenuation
• lineWidth: the line width
• opacity: the opacity
• color: the color, default to SiriWave.color; optional

The ios9 style definition is instead:

[
  { color: "255,255,255", supportLine: true },
  { color: "15, 82, 169" }, // blue
  { color: "173, 57, 76" }, // red
  { color: "48, 220, 155" }, // green
];

and it results in 3 different colored waves + 1 support wave that needs to be there.

Here you set:

• supportLine: only one of these curves must have this to true, it will be used to draw the support line
• color: the color of the wave

Start the animation

Stop the animation.

Set the new value of speed (animated)

Set the new value of amplitude (animated)

Stop the animation and destroy the canvas, by removing it from the DOM. Subsequent start() calls on this SiriWave instance will fail with an exception.

• GCX default
• GCX iOS 9

If you wanna make some modifications in your local environment, use:

npm dev

this will create a watchable build with RollupJS and automatically create a server to see your changes in the browser.

To finally build all targets:

npm build

You can find an excellent demo here by @semmel