Canvas functions

Behind the scenes, Canvas is driven by a powerful expression language that allows you to compose together a litany of flexible functions to create entirely new capabilities. Most of the time, this is hidden away, but since you’re here, we can guess you’ve figured out how it works. Below you will find a reference guide to all of the functions Canvas provides.

Canvas functions can run on the Kibana server, in the browser, or wherever is best for performance. For the most part you don’t need to know where a function will run unless you’re using Canvas to drive an alerting engine, in which case you can’t use client functions because there is likely no browser context to run them in.

In any case, we’ve divided the functions up by the environment they run in for the purpose of the documentation below. A * denotes a required argument.

Common functions

These functions can run anywhere, so they'll execute whereever the expression is currently executing. Eg, if the engine is currently running on the server, things will continue to run on the server.

all

Return true if all of the conditions are true

Arguments

Name Aliases Types Default Description
Unnamed* boolean The conditions to check

alterColumn

Converts between core types, eg string, number, null, boolean, date and rename columns

Arguments

Name Aliases Types Default Description
column* _ string The name of the column to alter
type string null The type to convert the column to. Leave blank to not change type.
name string null The resultant column name. Leave blank to not rename.

any

Return true if any of the conditions are true

Arguments

Name Aliases Types Default Description
Unnamed* boolean The conditions to check

as

Creates a datatable with a single value

Arguments

Name Aliases Types Default Description
Unnamed name string value A name to give the column

axisConfig

Configure axis of a visualization

Arguments

Name Aliases Types Default Description
show boolean true Show the axis labels?
position string `` Position of the axis labels. Eg, top, bottom, left, and right.

clog

Outputs the context to the console

columns

Include or exclude columns from a data table. If you specify both, this will exclude first

Arguments

Name Aliases Types Default Description
include string null A comma separated list of column names to keep in the table
exclude string null A comma separated list of column names to remove from the table

compare

Compare the input to something else to determine true or false. Usually used in combination with {if}. This only works with primitive types, such as number, string, and boolean.

Arguments

Name Aliases Types Default Description
Unnamed op string eq The operator to use in the comparison: eq (equal), ne (not equal), lt (less than), gt (greater than), lte (less than equal), gte (greater than eq)
to this, b Any The value to compare the context to, usually returned by a subexpression

containerStyle

Creates an object used for describing the properties of a series on a chart. You would usually use this inside of a charting function

Arguments

Name Aliases Types Default Description
border string Valid CSS border string
borderRadius string Number of pixels to use when rounding the border
padding string Content distance in pixels from border
backgroundColor string Valid CSS background color string
backgroundImage string Valid CSS background image string
backgroundSize string contain Valid CSS background size string
backgroundRepeat string no-repeat Valid CSS background repeat string
opacity number A number between 0 and 1 representing the degree of transparency of the element

context

Returns whatever you pass into it. This can be useful when you need to use context as argument to a function as a sub-expression

csv

Create datatable from csv input

Arguments

Name Aliases Types Default Description
Unnamed* string CSV data to use
delimiter* string Data separation character
newline* string Row separation character

date

Returns the current time, or a time parsed from a string, as milliseconds since epoch.

Arguments

Name Aliases Types Default Description
Unnamed string An optional date string to parse into milliseconds since epoch. Can be either a valid Javascript Date input or a string to parse using the format argument. Must be an ISO 8601 string or you must provide the format.
format* string The momentJS format for parsing the optional date string (See https://momentjs.com/docs/#/displaying/).

do

Runs multiple sub-expressions. Returns the passed in context. Nice for running actions producing functions.

Arguments

Name Aliases Types Default Description
Unnamed Any One or more sub-expressions. The value of these is not available in the root pipeline as this function simply returns the passed in context

Configure a drop down filter control element

Arguments

Name Aliases Types Default Description
filterColumn Any The column or field to attach the filter to
valueColumn Any The datatable column from which to extract the unique values for the drop down

eq

Return if the context is equal to the argument

Arguments

Name Aliases Types Default Description
Unnamed* boolean, number, string The value to compare the context to

exactly

Create a filter that matches a given column for a perfectly exact value

Arguments

Name Aliases Types Default Description
column* field, c string The column or field to attach the filter to
value* v, val string The value to match exactly, including white space and capitalization

filterrows

Filter rows in a datatable based on the return value of a subexpression.

Arguments

Name Aliases Types Default Description
Unnamed* fn boolean An expression to pass each rows in the datatable into. The expression should return a boolean. A true value will preserve the row, and a false value will remove it.

font

Create a font style

Arguments

Name Aliases Types Default Description
size number 14 Font size (px)
lHeight* lineHeight number Line height (px)
family string "'Open Sans', Helvetica, Arial, sans-serif" An acceptable CSS web font string
color string Text color
weight string normal Set the font weight, e.g. normal, bold, bolder, lighter, 100, 200, 300, 400, 500, 600, 700, 800, 900
underline boolean false Underline the text, true or false
italic boolean false Italicize, true or false
align string left Horizontal text alignment

formatdate

Output a ms since epoch number as a formatted string

Arguments

Name Aliases Types Default Description
Unnamed* string MomentJS Format with which to bucket (See https://momentjs.com/docs/#/displaying/)

formatnumber

Turn a number into a string using a NumberJS format

Arguments

Name Aliases Types Default Description
Unnamed* string NumeralJS format string http://numeraljs.com/#format

getCell

Fetch a single cell in a table

Arguments

Name Aliases Types Default Description
Unnamed* column, c string The name of the column value to fetch
row r number 0 The row number, starting at 0

gt

Return if the context is greater than the argument

Arguments

Name Aliases Types Default Description
Unnamed* boolean, number, string The value to compare the context to

gte

Return if the context is greater than or equal to the argument

Arguments

Name Aliases Types Default Description
Unnamed* boolean, number, string The value to compare the context to

Get the first N rows from the datatable. Also see tail

Arguments

Name Aliases Types Default Description
Unnamed number 1 Return this many rows from the beginning of the datatable

if

Perform conditional logic

Arguments

Name Aliases Types Default Description
Unnamed condition boolean A boolean true or false, usually returned by a subexpression. If this is not supplied then the input context will be used
then Any The return value if true
else Any The return value if false. If else is not specified, and the condition is falsethen the input context to the function will be returned

image

Display an image

Arguments

Name Aliases Types Default Description
dataurl _, url string data:image/svg+xml;base64,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 The HTTP(S) URL or base64 data of an image.
mode string contain "contain" will show the entire image, scaled to fit."cover" will fill the container with the image, cropping from the sides or bottom as needed."stretch" will resize the height and width of the image to 100% of the container

lt

Return if the context is less than the argument

Arguments

Name Aliases Types Default Description
Unnamed* boolean, number, string The value to compare the context to

lte

Return if the context is less than or equal to the argument

Arguments

Name Aliases Types Default Description
Unnamed* boolean, number, string The value to compare the context to

mapColumn

Add a column calculated as the result of other columns, or not

Arguments

Name Aliases Types Default Description
Unnamed* column string The name of the resulting column
expression exp, fn boolean, number, string A canvas expression which will be passed each row as a single row datatable

markdown

An element for rendering markdown text. Great for single numbers, metrics or paragraphs of text.

Arguments

Name Aliases Types Default Description
Unnamed string "" A string containing markdown. You can pass this multiple times to achieve concatenation
font style {font} Font settings. Technically you can stick other styles in here too!

math

Interpret a math expression, with a number or datatable as context. Datatable columns are available by their column name. If you pass in a number it is available as "value" (without the quotes)

Arguments

Name Aliases Types Default Description
Unnamed* string An evaluated TinyMath expression. (See TinyMath Functions)

metric

A number with a label

Arguments

Name Aliases Types Default Description
Unnamed string "" Text describing the metric
metricFont style {font size=48 family="'Open Sans', Helvetica, Arial, sans-serif" color="#000000" align=center lHeight=48} Font settings for the metric. Technically you can stick other styles in here too!
labelFont style {font size=14 family="'Open Sans', Helvetica, Arial, sans-serif" color="#000000" align=center} Font settings for the label. Technically you can stick other styles in here too!

neq

Return if the context is not equal to the argument

Arguments

Name Aliases Types Default Description
Unnamed* boolean, number, string The value to compare the context to

palette

Create a color palette

Arguments

Name Aliases Types Default Description
Unnamed* string Palette colors, rgba, hex, or HTML color string. Pass this multiple times.
gradient boolean false Prefer to make a gradient where supported and useful?
reverse Any false Reverse the palette

pie

Configure a pie chart element

Arguments

Name Aliases Types Default Description
palette palette {palette} A palette object for describing the colors to use on this pie
seriesStyle seriesStyle A style of a specific series
radius Any auto Radius of the pie as a percentage (between 0 and 1) of the available space. Set to 'auto' to automatically set radius
hole number 0 Draw a hole in the pie, 0-100, as a percentage of the pie radius
labels boolean true Show pie labels
labelRadius number 100 Percentage of area of container to use as radius for the label circle
font style {font} Label font
legend string, boolean false Legend position, nw, sw, ne, se or false
tilt number 1 Percentage of tilt where 1 is fully vertical and 0 is completely flat

plot

Configure a plot element

Arguments

Name Aliases Types Default Description
seriesStyle seriesStyle A style of a specific series
defaultStyle seriesStyle {seriesStyle points=5} The default style to use for every series
palette palette {palette} A palette object for describing the colors to use on this plot
font style {font} Legend and tick mark fonts
legend string, boolean ne Legend position, nw, sw, ne, se or false
yaxis boolean, axisConfig true Axis configuration, or false to disable
xaxis boolean, axisConfig true Axis configuration, or false to disable

ply

Subdivide a datatable and pass the resulting tables into an expression, then merge the output

Arguments

Name Aliases Types Default Description
by* string The column to subdivide on
expression* fn, function datatable An expression to pass each resulting data table into. Tips:

Expressions must return a datatable. Use as to turn literals into datatables. Multiple expressions must return the same number of rows. If you need to return a differing row count, pipe into another instance of ply. If multiple expressions return the same columns, the last one wins. |

render

Render an input as a specific element and set element level options such as styling

Arguments

Name Aliases Types Default Description
as string The element type to use in rendering. You probably want a specialized function instead, such as plot or grid
css string "* > * {}" Any block of custom CSS to be scoped to this element.
containerStyle containerStyle Style for the container, including background, border, and opacity

repeatImage

Configure a repeating image element

Arguments

Name Aliases Types Default Description
image string 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The image to repeat. Usually a dataURL or an asset
size number 100 The maximum height or width of the image, in pixels. Eg, if you images is taller than it is wide, this will limit its height
max number 1000 Maximum number of times the image may repeat
emptyImage string null Fill the difference between the input and the max= parameter with this image

replace

Use a regular expression to replace parts of a string

Arguments

Name Aliases Types Default Description
Unnamed* pattern, regex string The text or pattern of a JavaScript regular expression, eg "[aeiou]". You can use capture groups here.
flags modifiers string g Specify flags. See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp for reference.
replacement string "" The replacement for the matching parts of string. Capture groups can be accessed by their index, eg $1

revealImage

Configure a image reveal element

Arguments

Name Aliases Types Default Description
image string data:image/svg+xml,%3C%3Fxml%20version%3D%221.0%22%20encoding%3D%22utf-8%22%3F%3E%0A%3Csvg%20viewBox%3D%22-3.948730230331421%20-1.7549896240234375%20245.25946044921875%20241.40370178222656%22%20width%3D%22245.25946044921875%22%20height%3D%22241.40370178222656%22%20style%3D%22enable-background%3Anew%200%200%20686.2%20235.7%3B%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%0A%20%20%3Cdefs%3E%0A%20%20%20%20%3Cstyle%20type%3D%22text%2Fcss%22%3E%0A%09.st0%7Bfill%3A%232D2D2D%3B%7D%0A%3C%2Fstyle%3E%0A%20%20%3C%2Fdefs%3E%0A%20%20%3Cg%20transform%3D%22matrix%281%2C%200%2C%200%2C%201%2C%200%2C%200%29%22%3E%0A%20%20%20%20%3Cg%3E%0A%20%20%20%20%20%20%3Cpath%20class%3D%22st0%22%20d%3D%22M329.4%2C160.3l4.7-0.5l0.3%2C9.6c-12.4%2C1.7-23%2C2.6-31.8%2C2.6c-11.7%2C0-20-3.4-24.9-10.2%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc-4.9-6.8-7.3-17.4-7.3-31.7c0-28.6%2C11.4-42.9%2C34.1-42.9c11%2C0%2C19.2%2C3.1%2C24.6%2C9.2c5.4%2C6.1%2C8.1%2C15.8%2C8.1%2C28.9l-0.7%2C9.3h-53.8%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc0%2C9%2C1.6%2C15.7%2C4.9%2C20c3.3%2C4.3%2C8.9%2C6.5%2C17%2C6.5C312.8%2C161.2%2C321.1%2C160.9%2C329.4%2C160.3z%20M325%2C124.9c0-10-1.6-17.1-4.8-21.2%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc-3.2-4.1-8.4-6.2-15.6-6.2c-7.2%2C0-12.7%2C2.2-16.3%2C6.5c-3.6%2C4.3-5.5%2C11.3-5.6%2C20.9H325z%22%2F%3E%0A%20%20%20%20%20%20%3Cpath%20class%3D%22st0%22%20d%3D%22M354.3%2C171.4V64h12.2v107.4H354.3z%22%2F%3E%0A%20%20%20%20%20%20%3Cpath%20class%3D%22st0%22%20d%3D%22M443.5%2C113.5v41.1c0%2C4.1%2C10.1%2C3.9%2C10.1%2C3.9l-0.6%2C10.8c-8.6%2C0-15.7%2C0.7-20-3.4c-9.8%2C4.3-19.5%2C6.1-29.3%2C6.1%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc-7.5%2C0-13.2-2.1-17.1-6.4c-3.9-4.2-5.9-10.3-5.9-18.3c0-7.9%2C2-13.8%2C6-17.5c4-3.7%2C10.3-6.1%2C18.9-6.9l25.6-2.4v-7%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc0-5.5-1.2-9.5-3.6-11.9c-2.4-2.4-5.7-3.6-9.8-3.6l-32.1%2C0V87.2h31.3c9.2%2C0%2C15.9%2C2.1%2C20.1%2C6.4C441.4%2C97.8%2C443.5%2C104.5%2C443.5%2C113.5%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bz%20M393.3%2C146.7c0%2C10%2C4.1%2C15%2C12.4%2C15c7.4%2C0%2C14.7-1.2%2C21.8-3.7l3.7-1.3v-26.9l-24.1%2C2.3c-4.9%2C0.4-8.4%2C1.8-10.6%2C4.2%26%2310%3B%26%239%3B%26%239%3B%26%239%3BC394.4%2C138.7%2C393.3%2C142.2%2C393.3%2C146.7z%22%2F%3E%0A%20%20%20%20%20%20%3Cpath%20class%3D%22st0%22%20d%3D%22M491.2%2C98.2c-11.8%2C0-17.8%2C4.1-17.8%2C12.4c0%2C3.8%2C1.4%2C6.5%2C4.1%2C8.1c2.7%2C1.6%2C8.9%2C3.2%2C18.6%2C4.9%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc9.7%2C1.7%2C16.5%2C4%2C20.5%2C7.1c4%2C3%2C6%2C8.7%2C6%2C17.1c0%2C8.4-2.7%2C14.5-8.1%2C18.4c-5.4%2C3.9-13.2%2C5.9-23.6%2C5.9c-6.7%2C0-29.2-2.5-29.2-2.5%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bl0.7-10.6c12.9%2C1.2%2C22.3%2C2.2%2C28.6%2C2.2c6.3%2C0%2C11.1-1%2C14.4-3c3.3-2%2C5-5.4%2C5-10.1c0-4.7-1.4-7.9-4.2-9.6c-2.8-1.7-9-3.3-18.6-4.8%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc-9.6-1.5-16.4-3.7-20.4-6.7c-4-2.9-6-8.4-6-16.3c0-7.9%2C2.8-13.8%2C8.4-17.6c5.6-3.8%2C12.6-5.7%2C20.9-5.7c6.6%2C0%2C29.6%2C1.7%2C29.6%2C1.7%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bv10.7C508.1%2C99%2C498.2%2C98.2%2C491.2%2C98.2z%22%2F%3E%0A%20%20%20%20%20%20%3Cpath%20class%3D%22st0%22%20d%3D%22M581.7%2C99.5h-25.9v39c0%2C9.3%2C0.7%2C15.5%2C2%2C18.4c1.4%2C2.9%2C4.6%2C4.4%2C9.7%2C4.4l14.5-1l0.8%2C10.1%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc-7.3%2C1.2-12.8%2C1.8-16.6%2C1.8c-8.5%2C0-14.3-2.1-17.6-6.2c-3.3-4.1-4.9-12-4.9-23.6V99.5h-11.6V88.9h11.6V63.9h12.1v24.9h25.9V99.5z%22%2F%3E%0A%20%20%20%20%20%20%3Cpath%20class%3D%22st0%22%20d%3D%22M598.7%2C78.4V64.3h12.2v14.2H598.7z%20M598.7%2C171.4V88.9h12.2v82.5H598.7z%22%2F%3E%0A%20%20%20%20%20%20%3Cpath%20class%3D%22st0%22%20d%3D%22M663.8%2C87.2c3.6%2C0%2C9.7%2C0.7%2C18.3%2C2l3.9%2C0.5l-0.5%2C9.9c-8.7-1-15.1-1.5-19.2-1.5c-9.2%2C0-15.5%2C2.2-18.8%2C6.6%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc-3.3%2C4.4-5%2C12.6-5%2C24.5c0%2C11.9%2C1.5%2C20.2%2C4.6%2C24.9c3.1%2C4.7%2C9.5%2C7%2C19.3%2C7l19.2-1.5l0.5%2C10.1c-10.1%2C1.5-17.7%2C2.3-22.7%2C2.3%26%2310%3B%26%239%3B%26%239%3B%26%239%3Bc-12.7%2C0-21.5-3.3-26.3-9.8c-4.8-6.5-7.3-17.5-7.3-33c0-15.5%2C2.6-26.4%2C7.8-32.6C643%2C90.4%2C651.7%2C87.2%2C663.8%2C87.2z%22%2F%3E%0A%20%20%20%20%3C%2Fg%3E%0A%20%20%20%20%3Cpath%20class%3D%22st0%22%20d%3D%22M236.6%2C123.5c0-19.8-12.3-37.2-30.8-43.9c0.8-4.2%2C1.2-8.4%2C1.2-12.7C207%2C30%2C177%2C0%2C140.2%2C0%26%2310%3B%26%239%3B%26%239%3BC118.6%2C0%2C98.6%2C10.3%2C86%2C27.7c-6.2-4.8-13.8-7.4-21.7-7.4c-19.6%2C0-35.5%2C15.9-35.5%2C35.5c0%2C4.3%2C0.8%2C8.5%2C2.2%2C12.4%26%2310%3B%26%239%3B%26%239%3BC12.6%2C74.8%2C0%2C92.5%2C0%2C112.2c0%2C19.9%2C12.4%2C37.3%2C30.9%2C44c-0.8%2C4.1-1.2%2C8.4-1.2%2C12.7c0%2C36.8%2C29.9%2C66.7%2C66.7%2C66.7%26%2310%3B%26%239%3B%26%239%3Bc21.6%2C0%2C41.6-10.4%2C54.1-27.8c6.2%2C4.9%2C13.8%2C7.6%2C21.7%2C7.6c19.6%2C0%2C35.5-15.9%2C35.5-35.5c0-4.3-0.8-8.5-2.2-12.4%26%2310%3B%26%239%3B%26%239%3BC223.9%2C160.9%2C236.6%2C143.2%2C236.6%2C123.5z%20M91.6%2C34.8c10.9-15.9%2C28.9-25.4%2C48.1-25.4c32.2%2C0%2C58.4%2C26.2%2C58.4%2C58.4%26%2310%3B%26%239%3B%26%239%3Bc0%2C3.9-0.4%2C7.7-1.1%2C11.5l-52.2%2C45.8L93%2C101.5L82.9%2C79.9L91.6%2C34.8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The image to reveal
emptyImage string null An optional background image to reveal over
origin string bottom Where to start from. Eg, top, left, bottom or right

rounddate

Round ms since epoch using a moment formatting string. Returns ms since epoch

Arguments

Name Aliases Types Default Description
Unnamed* string MomentJS Format with which to bucket (See https://momentjs.com/docs/#/displaying/). For example "YYYY-MM" would round to the month

rowCount

Return the number of rows. Pair with ply to get the count of unique column values, or combinations of unique column values.

seriesStyle

Creates an object used for describing the properties of a series on a chart. You would usually use this inside of a charting function

Arguments

Name Aliases Types Default Description
label* string The label of the line this style applies to, not the name you would like to give the line.
color string Color to assign the line
lines number 0 Width of the line
bars number 0 Width of bars
points number 5 Size of points on line
fill number, boolean false Should we fill points?
stack number Should we stack the series? This is the stack "id". Series with the same stack id will be stacked together
horizontalBars boolean false Sets the orientation of bars in the chart to horizontal

shape

Create a shape

Arguments

Name Aliases Types Default Description
Unnamed shape string square Pick a shape
fill string black Valid CSS color string
border stroke string Valid CSS color string
borderWidth strokeWidth number 0 Thickness of the border
maintainAspect boolean false Select true to maintain aspect ratio

sort

Sorts a datatable on a column

Arguments

Name Aliases Types Default Description
Unnamed* column string The column to sort on. If column is not specified, the datatable will be sorted on the first column.
reverse* boolean Reverse the sort order. If reverse is not specified, the datatable will be sorted in ascending order.

staticColumn

Add a column with a static value.

Arguments

Name Aliases Types Default Description
Unnamed* column string The name of the new column column
value string, number, boolean null The value to insert in each column. Tip: use a sub-expression to rollup other columns into a static value

string

Output a string made of other strings. Mostly useful when combined with sub-expressions that output a string, or something castable to a string

Arguments

Name Aliases Types Default Description
Unnamed* string One or more strings to join together. Don't forget spaces where needed!

table

Configure a Data Table element

Arguments

Name Aliases Types Default Description
font style {font} Font style
paginate boolean true Show pagination controls. If set to false only the first page will be displayed.
perPage number 10 Show this many rows per page. You probably want to raise this is disabling pagination
showHeader boolean true Show or hide the header row with titles for each column.

tail

Get the last N rows from the end of a datatable. Also see head

Arguments

Name Aliases Types Default Description
Unnamed* number Return this many rows from the end of the datatable

timefilter

Create a timefilter for querying a source

Arguments

Name Aliases Types Default Description
column field, c Any @timestamp The column or field to attach the filter to
from f, start string Beginning of the range, in ISO8601 or Elasticsearch datemath format
to t, end string End of the range, in ISO8601 or Elasticsearch datemath format

timefilterControl

Configure a time filter control element

Arguments

Name Aliases Types Default Description
column field, c Any The column or field to attach the filter to
compact Any true Show the time filter as a button that triggers a popover

to

Explicitly cast from one type to another.

Arguments

Name Aliases Types Default Description
Unnamed* type string A known type

switch

Perform conditional logic with multiple conditions

Arguments

Name Aliases Types Default Description
Unnamed* case case The list of conditions to check
default finally Any The default case if no cases match

case

Build a case (including a condition/result) to pass to the switch function.

Arguments

Name Aliases Types Default Description
Unnamed Any This value is compared to the context to see if the condition is met. It is overridden by the "if" argument if both are provided.
if* boolean This value is used as whether or not the condition is met. It overrides the unnamed argument if both are provided.
then Any The value to return if the condition is met

Server functions

These functions can only execute on the server. This may be for performance or security reasons, or because the function uses an API only available on the Kibana server. If the expression is executing in the browser it will transfer to the server when it hits one of these functions

demodata

A mock data set that includes project CI times with usernames, countries and run phases.

Arguments

Name Aliases Types Default Description
Unnamed type string ci The name of the demo data set to use

esdocs

Query elasticsearch and get back raw documents. We recommend you specify the fields you want, especially if you are going to ask for a lot of rows

Arguments

Name Aliases Types Default Description
index string _all Specify an index pattern. Eg "logstash-*"
Unnamed query, q string -_index:.kibana A Lucene query string
sort string Sort directions as "field, direction". Eg "@timestamp, desc" or "bytes, asc"
fields string Comma separated list of fields. Fewer fields will perform better.
metaFields string Comma separated list of meta fields, eg "_index,_type"
count number 100 The number of docs to pull back. Smaller numbers perform better

escount

Query elasticsearch for a count of the number of hits matching a query

Arguments

Name Aliases Types Default Description
index string _all Specify an index pattern. Eg "logstash-*"
Unnamed query, q string "-_index:.kibana" A Lucene query string

essql

Elasticsearch SQL

Arguments

Name Aliases Types Default Description
Unnamed* query, q string SQL query
count number 1000 Someone didn't do their job. There should be help text here

pointseries

Turn a datatable into a point series model. Currently we differentiate measure from dimensions by looking for a TinyMath function. If you enter a TinyMath expression in your argument, we treat that argument as a measure, otherwise it is a dimension. Dimensions are combined to create unique keys. Measures are then deduplicated by those keys using the specified TinyMath function

Arguments

Name Aliases Types Default Description
x string The values along the X-axis
y string The values along the y-axis
color string An expression to use in determining the mark's color
size string For elements that support it, the size of the marks
text string For use in charts that support it, the text to show in the mark

server

Force the interpreter to return to the server

timelion

Use timelion to extract one or more timeseries from many sources.

Arguments

Name Aliases Types Default Description
Unnamed query, q string ".es(*)" A timelion query
interval string auto Bucket interval for the time series
from Any now-1y Elasticsearch date math string for the start of the time range
to Any now Elasticsearch date math string for the end of the time range
timezone Any UTC Timezone for the time range

Client functions

These functions must execute in a browser. That means they're only available from within the Canvas application, not via the Canvas HTTP API. They need to execute in the browser because they use browser specific APIs, such as location, or interacting with the workpad to read filters.

asset

Use Canvas workpad asset objects to provide argument values. Usually images.

Arguments

Name Aliases Types Default Description
Unnamed* string The ID of the asset value to return

browser

Force the interpreter to return to the browser

filters

Collect element filters on the workpad, usually to provide them to a data source

location

Use the browser's location functionality to get your current location. Usually quite slow, but fairly accurate

urlparam

Access URL parameters and use them in expressions. Eg https://localhost:5601/app/canvas?myVar=20. This will always return a string

Arguments

Name Aliases Types Default Description
Unnamed* var, variable string The URL hash parameter to access
default string "" Return this string if the url parameter is not defined