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hast-util-has-property
hast utility to check if a node has a property
unist hast hast-util util utility html element property check
is-identifier
Check if a string is a valid JavaScript identifier
identifier keyword word check test reserved javascript ecmascript variable function property is valid
hast-util-is-event-handler
hast utility to check if a property is an event handler
event handler hast hast-util html property unist util utility
regexp-support
check RegExp ( regular expressions ) support
check es2018 esnext flag flags is pattern property proto prototype re regex regexp regular expression
is-css-shorthand
Check whether a given CSS property is the shorthand form
css shorthand property
jasmine-check
Generative property tests for Jasmine
jasmine quickcheck testcheck generative property test
is-descriptor
Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.
accessor check data descriptor get getter is keys object properties property set setter type
is-data-descriptor
Returns true if a value has the characteristics of a valid JavaScript data descriptor.
accessor check data descriptor get getter is keys object properties property set setter type
has-value
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
array boolean check deep empty function has hasOwn is-empty nested null number object object path
is-accessor-descriptor
Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.
accessor check data descriptor get getter is keys object properties property set setter type
css-declaration-sorter
Sorts CSS declarations fast and automatically in a certain order.
postcss postcss-plugin css declaration sorter property order
extend-shallow
Extend an object with the properties of additional objects. node.js/javascript util.
assign clone extend merge obj object object-assign object.assign prop properties property props shallow util
hasown
A robust, ES3 compatible, "has own property" predicate.
has hasOwnProperty hasOwn has-own own property in javascript ecmascript
define-property
Define a non-enumerable property on an object. Uses Reflect.defineProperty when available, otherwise Object.defineProperty.
define define-property enumerable key non non-enumerable object prop property value
gopd
`Object.getOwnPropertyDescriptor`, but accounts for IE's broken implementation.
ecmascript javascript getownpropertydescriptor property descriptor
es-define-property
`Object.defineProperty`, but not IE 8's broken one.
javascript ecmascript object define property defineProperty Object.defineProperty
has-property-descriptors
Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.
property descriptors has environment env defineProperty getOwnPropertyDescriptor
merge-descriptors
Merge objects using their property descriptors
merge descriptors object property properties merging getter setter
define-data-property
Define a data property on an object. Will fall back to assignment in an engine without descriptors.
define data property object accessor javascript ecmascript enumerable configurable writable
define-lazy-prop
Define a lazily evaluated property on an object
lazy property properties prop define object value lazily laziness evaluation eval execute getter function