null-check

Ensure a path doesn't contain null bytes

v3.0.0 URL: https://unpkg.com/null-check@3.0.0/index.js

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built-in core ponyfill polyfill shim fs path null bytes check

typechecker

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

v9.3.0 URL: https://unpkg.com/typechecker@9.3.0/index.cjs

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array assert assertion async async function async-function asyncFunction bool boolean browser check check-type checking class class-identifier class-instance compare conventional class conventional-class conventionalClass date define-type deno deno-edition deno-entry denoland empty empty array empty keys empty map empty plain object empty-array empty-keys empty-map empty-plain-object emptyArray emptyKeys emptyMap emptyPlainObject error es2022 es5 function get object type get type get-object-type get-type getObjectType getType instanceof is is arguments is array is async is async function is bool is boolean is class is conventional class is date is empty array is empty keys is empty map is empty plain object is empty weak map is error is function is map is native class is null is nullish is number is object is plain object is regexp is string is sync is sync function is undefined is weak map is-arguments is-array is-async is-async-function is-bool is-boolean is-class is-conventional-class is-date is-empty-array is-empty-keys is-empty-map is-empty-plain-object is-empty-weak-map is-error is-function is-map is-native-class is-null is-nullish is-number is-object is-plain-obj is-plain-object is-regexp is-string is-sync is-sync-function is-undefined is-weak-map isArguments isArray isAsyncFunction isBool isBoolean isClass isConventionalClass isDate isEmptyArray isEmptyKeys isEmptyMap isEmptyPlainObject isEmptyWeakMap isError isFunction isMap isNativeClass isNull isNullish isNumber isObject isRegExp isString isSync isSyncFunction isUndefined isWeakMap javascript javascript-type keys kind map module native native class native-class nativeClass node null number object plain plain object plain objects plain-object plain-objects plainObject primitive primitive-types pure regex regexp regular expression simple string sync syncFunction test type type-check type-checker type-checking typechecker typed typeguards typeof types typescript undefined util utility validate validation vanilla verify weak map weak-map weakMap what-type

itype

Improved type check

v3.0.1 URL: https://unpkg.com/itype@3.0.1/lib/itype.js

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type string array object boolean null undefined check

falzy

Check if the value is undefined, null, empty string, NaN and Infinity.

v0.23.0 URL: https://unpkg.com/falzy@0.23.0/falzy.js

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value undefined null empty-string NaN false falsy falzy

empty-value

Check if a given value is empty in JS extending his "truthy" and "falsy" nature

v1.0.1 URL: https://unpkg.com/empty-value@1.0.1/index.js

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empty value array object string boolean null undefined truthy falsy