String filter functions available through the core query engine.
Source of truth: src/packages/core/src/query-engine/functions/string-functions.ts
| Function | Signature | Description | Example |
|---|---|---|---|
upper |
upper(value) |
Convert string to uppercase. | "hello" \| upper -> "HELLO" |
lower |
lower(value) |
Convert string to lowercase. | "HELLO" \| lower -> "hello" |
capitalize |
capitalize(value) |
Capitalize first character. | "hello" \| capitalize -> "Hello" |
trim |
trim(value) |
Trim both ends. | " hi " \| trim -> "hi" |
ltrim |
ltrim(value) |
Trim left side. | " hi" \| ltrim -> "hi" |
rtrim |
rtrim(value) |
Trim right side. | "hi " \| rtrim -> "hi" |
replace |
replace(value, search, replacement) |
Replace all substring matches. | "a-b-a" \| replace("a", "x") -> "x-b-x" |
slice |
slice(value, start, end?) |
Substring slice. | "hello" \| slice(1, 4) -> "ell" |
split |
split(value, delimiter) |
Split string into array. | "a,b" \| split(",") -> ["a", "b"] |
join |
join(arrayValue, separator) |
Join array into string. | ["a","b"] \| join("-") -> "a-b" |
startsWith |
startsWith(value, prefix) |
Prefix check. | "hello" \| startsWith("he") -> true |
endsWith |
endsWith(value, suffix) |
Suffix check. | "hello" \| endsWith("lo") -> true |
includes |
includes(value, substring) |
Contains check. | "hello" \| includes("ell") -> true |
indexOf |
indexOf(value, substring) |
Index lookup. | "hello" \| indexOf("l") -> 2 |
padStart |
padStart(value, length, fillStr?) |
Left pad to target length. | "7" \| padStart(3, "0") -> "007" |
padEnd |
padEnd(value, length, fillStr?) |
Right pad to target length. | "7" \| padEnd(3, "0") -> "700" |
repeat |
repeat(value, count) |
Repeat string. | "ab" \| repeat(2) -> "abab" |
reverse |
reverse(value) |
Reverse characters. | "abc" \| reverse -> "cba" |
escape |
escape(value) |
HTML-escape text. | "<b>" \| escape -> "<b>" |
truncate |
truncate(value, length, suffix?) |
Truncate with optional suffix. | "hello world" \| truncate(5) -> "hello..." |
replace uses a global regular expression built from search.join expects an array input and throws on non-array values.truncate appends ... by default when a suffix is not provided.