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1000+ packages found

Test if a value is NaN.

published version 0.2.2, 8 months ago51 dependents licensed under $Apache-2.0
250,989

Validate hostname based on RFC-1123

published version 1.0.2, 4 years ago14 dependents licensed under $MIT
152,978

Test if a value is a Uint8ClampedArray.

published version 0.2.2, 8 months ago1 dependents licensed under $Apache-2.0
150,959

Test if a value is an Int16Array.

published version 0.2.2, 8 months ago1 dependents licensed under $Apache-2.0
150,923

Validate object properties in javascript.

published version 5.2.0, 3 years ago160 dependents licensed under $MIT
160,205

Determinate if a string is a valid URI.

published version 1.2.6, a year ago18 dependents licensed under $MIT
120,742

Test if a value is an array-like object of numbers.

published version 0.2.2, 8 months ago15 dependents licensed under $Apache-2.0
109,838

Validates if a value is a nonnegative integer.

published version 1.0.0, 10 years ago98 dependents
162,233

Test if a value is a collection.

published version 0.2.2, 8 months ago134 dependents licensed under $Apache-2.0
167,877

Test if a value is an Int32Array.

published version 0.2.2, 8 months ago4 dependents licensed under $Apache-2.0
150,999

Test whether a value has in its prototype chain a specified constructor as a prototype property.

published version 0.2.2, 8 months ago4 dependents licensed under $Apache-2.0
95,975

Validates if a value is a number primitive and an integer.

published version 1.0.0, 10 years ago7 dependents
141,615

Test if a value is a complex number-like object.

published version 0.2.2, 8 months ago14 dependents licensed under $Apache-2.0
94,457

Test if a value is typed-array-like.

published version 0.2.2, 8 months ago25 dependents licensed under $Apache-2.0
93,564

Validates if a value is matrix-like.

published version 1.0.2, 10 years ago95 dependents licensed under $MIT
135,282

Validates if a value is a Buffer object.

published version 1.0.2, 9 years ago5 dependents licensed under $MIT
144,691

Validates if a value is a string primitive.

published version 1.0.1, 9 years ago212 dependents licensed under $MIT
149,501

Test if a value is an Int8Array.

published version 0.2.2, 8 months ago1 dependents licensed under $Apache-2.0
150,910

Ensures a value is a valid error by making it one if not

published version 4.0.0, 4 years ago22 dependents licensed under $MIT
82,358

Test if a value is an Error object.

published version 0.2.2, 8 months ago341 dependents licensed under $Apache-2.0
137,480