spiegel-keyman/web/docs/engine/reference/util/rgba.md
Marc Durdin 1f82507730 docs(web): deprecate unused and obsolete API endpoints and docs cleanup
Deprecate the following obsolete functions and properties:
* `keyman.helpURL`
* `keyman.util.rgba`
* `keyman.util.toFloat`
* `keyman.util.toNumber`
* `keyman.util.toNzString`

Use correct language for code blocks in Keyman Engine for Web
documentation.

Test-bot: skip
2026-08-12 16:07:22 +02:00

53 lines
788 B
Markdown

---
title: rgba (deprecated)
---
## Summary
Browser-independent alpha-channel management.
## Syntax
```js
keyman.util.rgba(s, r, g, b, a);
```
### Parameters
`s`
: Type: `Element`
: Element style object
`r`
: Type: `number`
: Value for red (0-255)
`g`
: Type: `number`
: Value for green (0-255)
`b`
: Type: `number`
: Value for blue (0-255)
`a`
: Type: `number`
: Value for alpha/opacity (0-1.0)
### Return Value
`string`
: Background color CSS value.
## Description
This function returns the required string value for setting background
transparency, and applies an appropriate `a` filter to the element for IE
versions before IE9.
This function has been deprecated and will be removed in a future version of
KeymanWeb.
## History
19.0: deprecated