@flourish/colors
v7.0.0
Published
Adds color settings
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Flourish colors
Add settings and logic to easily add custom colors to your template
Install
npm install @flourish/colors
Unit tests
Test using:
npm run test
Test a specific test file using:
npm run test test/name-of-test.test.mjs
Basic usage
The settings.yml
file should be imported into your template’s template.yml
file, like this:
- Colours
- property: color
import: "@flourish/colors"
You can use overrides
to control whether to show categorical or numerical color settings. See below for an example. Replace [dataset]
and [binding]
with the relevant dataset and binding name (learn more about conditional settings).
- Colours
- property: color
import: "@flourish/colors"
overrides:
- tag: discrete
show_if:
data.[dataset].[binding].type: string
- tag: numeric
show_if:
data.[dataset].[binding].type: number
Add a color object to your template state:
export var state = {
color: {},
...
}
Import the package like import createColors from "@flourish/colors"
var colors = createColors(state.color)
creates a new object colors
.
You only need to pass in a state to get the color function working.
Methods
colors.getColor(value)
finds the correct color for value
. Will just return the fallback value unless the updateColorScale method has been called at some point.
colors.fallback([value])
returns the current fallback value if value
is undefined or (usually) sets it to value
if it is defined and returns the colors
object. The value
"default" (re)sets the fallback to be the default value of null. The fallback value is returned whenever the getColor
method cannot interpret the value passed into it (for example if that value is non-numeric when in sequential or diverging mode).
colors.updateColorScale(domain)
updates the color scale based on the domain
array. In general the domain array is an array of data values that the scale should be based on. For a categorical scale, this'll be an array of strings. For numeric (sequential or diverging) scales, this'll be an array of numbers (e.g. [10, 50, 30, 20, 50, 10, 30, 60, 100, 90]
).