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@maiscrm/inobounce

v0.1.4

Published

Stop your iOS webapp from bouncing around when scrolling

Downloads

3

Readme

iNoBounce

Stop your iOS webapp from bouncing around when scrolling

The problem

You've built a nice full-screen mobile webapp, complete with scrollable elements using the -webkit-overflow-scrolling property. Everything is great, however, when you scroll to the top or bottom of your scrollable element, the window exhibits rubber band-like behavior, revealing a gray tweed pattern. Sometimes, your scrollable element doesn't scroll at all, but the window still insists on bouncing around.

The solution

No dependencies, no configuration, just include iNoBounce.

<script src="inobounce.js"></script>

Example

All you need is an element with height or max-height, overflow: auto and -webkit-overflow-scrolling: touch.

<script src="inobounce.js"></script>

<style>
    ul {
        height: 115px;
        border: 1px solid gray;
        overflow: auto;
        -webkit-overflow-scrolling: touch;
    }
</style>

<ul>
    <li>List Item 1</li>
    <li>List Item 2</li>
    <li>List Item 3</li>
    <li>List Item 4</li>
    <li>List Item 5</li>
    <li>List Item 6</li>
    <li>List Item 7</li>
    <li>List Item 8</li>
    <li>List Item 9</li>
    <li>List Item 10</li>
</ul>

See the examples/ folder for more examples, including a full-screen list, a canvas drawing app, and a fully skinned iOS-style app.

API

Loading inobounce.js will define the iNoBounce namespace. If the loading environment supports AMD, iNoBounce will register itself as a model and forgo defining the namespace.

  • iNoBounce.enable()
    Enable iNoBounce. It's enabled by default on platforms that support -webkit-overflow-scrolling, so you only need to call this method if you explicitly disable it or want to enable it on a platform that doesn't support -webkit-overflow-scrolling.

  • iNoBounce.disable()
    Disable iNoBounce.

  • iNoBounce.isEnabled()
    Returns a boolean indicating if iNoBounce is enabled.

Will it break my app that uses touch events like other solutions?

It shouldn't. iNoBounce includes an example of a canvas drawing app and has been used in conjunction with Hammer.js without affecting functionality.

How does it work?

iNoBounce detects if the browser supports -webkit-overflow-scrolling by checking for the property on a fresh CSSStyleDeclaration. If it does, iNoBounce will listen to touchmove and selectively preventDefault() on move events that don't occur on a child of an element with -webkit-overflow-scrolling: touch set. In addition, iNoBounce will preventDefault() when the user is attemping to scroll past the bounds of a scrollable element, preventing rubberbanding on the element itself (an unavoidable caveat).

Shoutouts

How can I get that awesome iOS CSS skin from the app example?

Check out iOCSS for a lightweight and easy to use iOS skin for your mobile webapp.

Tapping stuff has a delay, what the heck?

You need FastClick by FT Labs.

Now I want awesome multi-touch gestures too!

It's hammer time, baby. Check out Hammer.js from Eight Media.

License

iNoBounce is licensed under the permissive BSD license.