Creuna JS utils

A collection of useful JS utility functions.

Importing

You can choose whether you want to import everyting or individual modules.

// Import everything:
import utils from "@creuna/utils";

// Import single:
import rangeMap from "@creuna/utils/range-map";

Functions

anyToKebab(input)

@creuna/utils/any-to-kebab

input: string
returns: string

anyToKebab("CamelCaseString"); // "camel-case-string"

arrayInsert(array, index, item)

@creuna/utils/array-insert

array: array
index: number
item: any
returns: array

Returns a new array that is a deep clone of the one passed in containing the new item at the specified index.

arrayInsert(["a", "b", "c"], 1, "x"); // ['a', 'x', 'b', 'c']

arrayMove(array, oldIndex, newIndex)

@creuna/utils/array-move

array: array
oldIndex: number
newIndex: number
returns: array

Returns a new array that is a deep clone of the one passed in with the item at oldIndex moved to newIndex.

arrayInsert(["a", "b", "c"], 1, 2); // ['a', 'c', 'b']

arrayRemove(array, index)

@creuna/utils/array-remove

array: array
index: number
returns: array

Returns a new array that is a deep clone of the one passed in with the item at index removed.

arrayInsert(["a", "b", "c"], 1); // ['a', 'c']

clamp(value, minimum, maximum)

@creuna/utils/clamp

value: number
minimum: number
maximum: number
returns: number

clamp can be used to keep a value between a min and max value.

createPipe(...functions)

@creuna/utils/create-pipe

functions: any number of functions
returns: function

The pipe combines n functions, calling each function with the output of the last one. To actually execute the pipeline, call the returned function with a value. More on this concept here.

pipe(
  removeSpaces,
  capitalize,
  reverseString
)("a b c"); // "CBA"

deepClone(thing)

@creuna/utils/deep-clone

thing: object | array
returns: object | array

Returns a deep clone of an object (any nested objects or arrays will also be cloned). Be aware that this uses JSON.stringify, meaning that any array elements or object values that are undefined will be stripped

filterObject(object, predicate)

@creuna/utils/filter-object

object: object
value: (key: string, value: any): boolean
returns: object

Tests predicate (with key and value) for every entry in object. Returns a new object that contains every entry that passed the test.

const obj = { a: 1, b: 2, c: 3 };
filterObject(obj, (key, value) => key !== "b" && value !== 3); // { a: 1 }

fromQueryString(queryString[, prefix])

@creuna/utils/from-query-string

queryString: string
prefix: string (default '?')
returns: object

Converts a query string into an object.

fromQueryString("?param=test&other=test");
// { param: "test", other: "test" }

fromQueryString("#param=test&other=test", "#");
// { param: "test", other: "test" }

getData(dataAttributeName)

@creuna/utils/get-data

dataAttributeName: string
returns: string

Returns the value of the first DOM node with dataAttributeName

<body>
    <div data-some-attribute="true"></div>
</body>

getData("some-attribute"); // "true"

isEqual(a, b)

@creuna/utils/is-equal

a: any
b: any
returns: boolean

Checks whether a and b are equal (deep comparison for objects and arrays). This uses JSON.stringify, so be aware that array elements or object values that are undefined will be stripped.

isFullyInViewport(node)

@creuna/utils/is-fully-in-viewport

node: DOM node
returns: boolean

Checks whether the given element is fully visible in the viewport. This is a special case of isInViewport where the offsets are the dimensions of the element.

isInViewport(node, offset[, offsetX])

@creuna/utils/is-in-viewport

node: DOM node
offset: number
offsetX: number (defaults to offset)
returns: boolean

Checks whether the given element is visible in the viewport. Positive numbers for offset mean more of the element needs to be in the viewport while negative numbers mean that the element can be outside of the viewport.

isRunningOnClient: bool

@creuna/utils/is-running-on-client

exports: bool

Exports a boolean indicating whether or not the code is running on the client.

import isRunningOnClient from "@creuna/utils/is-running-on-client"; // true || false

kebabToCamel(kebabString)

@creuna/utils/kebab-to-camel

kebabString: string (kebab-case formatted)
returns: string (camelCase formatted)

kebabToCamel("kebab-string"); // "kebabString"

kebabToPascal(kebabString)

@creuna/utils/kebab-to-pascal

kebabString: string (kebab-case formatted)
returns: string (PascalCase formatted)

kebabToPascal("kebab-string"); // "KebabString"

pipe(value, ...functions)

@creuna/utils/pipe

value: any value
functions: any number of functions
returns: any (the result of running value through the pipeline)

A function that emulates the pipeline operator. For more advanced composition stuff, see createPipe.

pipeValue("a b c", removeSpaces, capitalize, reverseString); // "CBA"

rangeMap(val, inMin, inMax, outMin, outMax)

@creuna/utils/range-map

val: number
inMin: number
inMax: number
outMin: number
outMax: number
returns: number

Re-maps a number from one numeric range onto another.

rangeMap(0.5, 0, 1, 0, 100); // 50

replaceQueryParameters(url, query)

@creuna/utils/replace-query-parameters

url: string
query: object
returns: string

Adds or replaces query parameters in url.

replaceQueryParameters("http://lorem.com?param1=a&param2=b", {
  param2: "BBB",
  param3: "CCC"
});
// "http://lorem.com?param1=a&param2=CCC&param3=DDD"

scrollToElement(node, offset, duration, delay)

@creuna/utils/scroll-to-element

node: DOM node
offset: number (default 0 px)
duration: number (default 500 ms)
delay: number (default 0 ms)

Finds the scroll position of node and scrolls it into view (animated)

scrollToPosition(y, duration)

@creuna/utils/scroll-to-position

y: number
duration: number (default 500 ms)

scrollingElement: node

@creuna/utils/scrolling-element

Get the scrolling element (useful because some browsers use document.scrollingElement, some use document.documentElement and others use document.body. When not running on client, scrollingElement is undefined.

import scrollingElement from "@creuna/utils/scrolling-element";

if (scrollingElement) {
  scrollingElement.scrollTo(0, 100);
}

stripPropertiesWithKeys(object, keys)

@creuna/utils/strip-properties-with-keys

object: object
value: string[]
returns: object

Returns a shallow copy of object with properties matching any of the keys removed

const obj = { a: 1, b: 2, c: 3 };
stripPropertiesWithKeys(obj, ["b", "c"]); // { a: 1 }

stripPropertiesWithValue(object, value)

@creuna/utils/strip-properties-with-value

object: object
value: any
returns: object

Returns a shallow copy of object with properties matching value removed

const obj = { a: 1, b: 2 };
stripPropertiesWithValue(obj, 2); // { a: 1 }

stripUndefined(object)

@creuna/utils/strip-undefined

object: object
returns: object

Returns a shallow copy of object with properties matching undefined removed

toQueryString(object[, options])

@creuna/utils/to-query-string

object: object
options: object || bool (bool is used for encode)
- encode: bool (default true)
- prefix: string (default '?')
returns: string

Creates a query string representation of object. Encodes object values by default.

toQueryString({ param: "test", other: "test" });
// "?param=test&other=test"

toQueryString({ param: "test foo", other: "test" });
// "?param=test%20foo&other=test"

toQueryString({ param: "test foo", other: "test" }, { encode: false });
// "?param=test foo&other=test"

toQueryString({ param: "test", other: "test" }, { prefix: "#" });
// "#param=test&other=test"

tryParseJson(json, default)

@creuna/utils/try-parse-json

json: string (json)
default: any
returns: object if sucessfully parsed; default if unsuccessful

@creuna/utils

Creuna JS utils

Importing

Functions

anyToKebab(input)

arrayInsert(array, index, item)

arrayMove(array, oldIndex, newIndex)

arrayRemove(array, index)

clamp(value, minimum, maximum)

createPipe(...functions)

deepClone(thing)

filterObject(object, predicate)

fromQueryString(queryString[, prefix])

getData(dataAttributeName)

isEqual(a, b)

isFullyInViewport(node)

isInViewport(node, offset[, offsetX])

isRunningOnClient: bool

kebabToCamel(kebabString)

kebabToPascal(kebabString)

pipe(value, ...functions)

rangeMap(val, inMin, inMax, outMin, outMax)

replaceQueryParameters(url, query)

scrollToElement(node, offset, duration, delay)

scrollToPosition(y, duration)

scrollingElement: node

stripPropertiesWithKeys(object, keys)

stripPropertiesWithValue(object, value)

stripUndefined(object)

toQueryString(object[, options])

tryParseJson(json, default)

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