248 packages found
Test if a value is a function.
Test if a value is a string.
Standard assertion utilities.
- stdlib
- stdassert
- assertion
- assert
- expectation
- expect
- utilities
- utility
- utils
- util
- test
- check
- validate
- validation
- View more
Test if a value is a regular expression string.
- stdlib
- stdassert
- assertion
- assert
- utils
- util
- utilities
- utility
- isregexp
- regular expression
- regexp
- regex
- regular
- expression
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Test if an object has a specified property.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- object
- obj
- has
- hasown
- hasownproperty
- property
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Test if a value is object-like.
Test if a value is a plain object.
Test if a value is a boolean.
Test if a value is a number.
Test if a value is a Uint8Array.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- uint8array
- uint8
- unsigned
- integer
- int
- uint
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Test if a value is an array.
Test if a value is a Buffer object.
Test if a value is an object.
Test if a value is a Uint32Array.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- uint32array
- uint32
- unsigned
- integer
- int
- uint
- View more
Test if an array-like object supports the accessor (get/set) protocol.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- array
- typed array
- collection
- float64array
- float32array
- int32array
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Test if a value is a Float64Array.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- float64array
- float64
- double
- ieee754
- typed
- typed array
- View more
Test if a value is a Float32Array.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- float32array
- float32
- float
- typed
- typed array
- typed-array
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Check if an environment is little endian.
Test if a value is a regular expression.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- valid
- validate
- regular expression
- regexp
- regex
- is
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Return a function which tests if every element in an array passes a test condition.