---
title: `keyman.util` - Utility Module
---

The KeymanWeb Utility Function module is exposed to the developer as `window.keyman.util`.

[`addStyleSheet` Function](addStyleSheet)
:   Add or override default On-Screen Keyboard styles.

[`alert` Function](alert)
:   Customized alert window.

[`attachDOMEvent` Function](attachDOMEvent)
:   Attach user-defined event handler for any DOM event for an element.

[`createElement` Function](createElement)
:   Create an unselectable HTML element for the KeymanWeb On-Screen
    keyboard and User Interfaces.

[`detachDOMEvent` Function](detachDOMEvent)
:   Detach DOM event handler from element to prevent memory leaks.

[`getAbsolute` Function](getAbsolute)
:   Get the absolute position of an element.

[`getAbsoluteX` Function](getAbsoluteX)
:   Get the absolute y-coordinate of an element.

[`getAbsoluteY` Function](getAbsoluteY)
:   Get the absolute y-coordinate of an element.

[`getOption` Function](getOption)
:   Get a KeymanWeb, On-Screen Keyboard or User Interface option value.

[`isTouchDevice` Function](isTouchDevice)
:   Allow external callers (such as UIs) to detect if the active device
    is touch sensitive.

[`linkStyleSheet` Function](linkStyleSheet)
:   Add a reference to an external stylesheet file.

[`loadCookie` Function](loadCookie)
:   Get a document cookie, or an array of all document cookies.

[`removeStyleSheet` Function](removeStyleSheet)
:   Remove user-defined style sheet.

[`rgba` Function](rgba)
:   Browser-independent alpha-channel management.

[`saveCookie` Function](saveCookie)
:   Save document variables as a cookie.

[`setOption` Function](setOption)
:   Set a KeymanWeb, On-Screen Keyboard or User Interface option value.

[`toFloat` Function](toFloat)
:   Floating conversion with default.

[`toNumber` Function](toNumber)
:   Integer conversion with default.

[`toNzString` Function](toNzString)
:   Returns default string value if argument is null, false, an empty
    string, or undefined.