JSPM

Test if an object has a specified property.

Test if a value is an array.

Return a function which tests if every element in an array passes a test condition.

Test if a value is a regular expression.

Test if a value is object-like.

Test if a value is a Uint8Array.

Test if a value is a Uint16Array.

Check if an environment is little endian.

Check if an environment is big endian.

Test if a value is a regular expression string.

Test if a value is a Buffer object.

Test if a value is a plain object.

Test if a value is a string.

Test if a value is a boolean.

Test if a value is a function.

Test if a value is a Float64Array.

Test if a value is a Uint32Array.

Test if a value is an object.

Test if a value is a Float32Array.

Test if a value is a number.

Test if a value is NaN.

Test if a value is an Int32Array.

Test if a value is an Int16Array.

Test if a value is a Uint8ClampedArray.

Test if a value is a number having a nonnegative integer value.

Test if a value is a number having an integer value.

Test if an object's own property is enumerable.

Test if a value is a collection.

Standard assertion utilities.

Test if a value is a number having a positive integer value.

Test if a value is an Error object.

Test if a value is an Int8Array.

Test if a value is an arguments object.

Test if a value is an ArrayBuffer.

Test if a value is a number having a positive value.

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

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

Return a function which tests if every element in an array-like object passes a test condition.

Test if a value is a Complex64Array.

Test if a value is an array-like object.

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

Test if a value is array-like.

Test if an array-like object supports the accessor (get/set) protocol.

Test if an array-like value contains a search value.

Test if a value is typed-array-like.

Test if a value is a typed array.

Test if a value is a complex typed array.

Test if a value is a Complex128Array.

Test if a value is a probability.

Test if a value is an array of strings.

Test if a value is a DataView.

Test if a value is an array-like object containing only nonnegative integers.

Test if a value is an array-like object containing only integers.

Test if a value is a URI.

Test if a value is an empty array.

Test if a value is an array of probabilities that sum to one.

Test if a value is ndarray-like.

Test if a value is a semantic version string.

Test if a value is a string having an uppercase first character.

Check if the runtime is Node.js.

Test if a value is Node stream-like.

Check if the runtime is a web browser.

Test if a value is a number having a nonnegative value.

Test if a value is Node writable stream-like.

Test if an object has a specified method name, either own or inherited.

Test if a value is null.

Test if a value is a gzip buffer.

Boolean indicating if the current process is running on Windows.

Test if a value is a 2-dimensional ndarray-like object.

Test if a value is iterator-like.

Test if a value is an array-like object containing only positive integers.

Test if an object has a specified property, either own or inherited.

Test if a value is an array of arrays.

Test if a value is iterable-like.

Test if a value is a JavaScript primitive.

Test if a value is undefined or null.

Test if a value is a BooleanArray.

Test if a value is an empty collection.

Test if a value is a relative path.

Test if two double-precision floating-point numbers are the same value.

Test if a value is an array-like object containing only probabilities.

Test if a value is an absolute path.

Test if an object-like value contains a circular reference.

Test if a value is an array-like object containing only functions.

Test if a value is a Date object.

Test if two arguments are the same value.

Test if a value is a parseable JSON string.

Test if a value is undefined.

Test for deep equality between two values.

Test if an object's prototype chain contains a provided prototype.

Test if two arguments are both Float64Arrays and have the same values.

Test whether a value is a localhost hostname.

Test if an object has a specified method name.

Test if a value is a complex typed array.

Test if a value is a 1-dimensional ndarray-like object.

Test if a value is a BooleanArray.

Test if a value is a Slice object.

Test if a value is a 2-dimensional ndarray-like object having equal dimensions.

Test whether a character belongs to the ASCII character set and whether this is true for all characters in a provided string.

Test if two arguments are both generic arrays and have the same values.

Test if a value is a symbol.

Test if a value is a BigInt.

Test if a value is a Complex128Array.

Test if a value is a domain name.

Test if a value is a Complex64Array.

Test if two arguments are both Float32Arrays and have the same values.

Test if a value is a string in kebab case.

Test if two arguments are both Complex128Arrays and have the same values.

Test whether a string contains only numeric digits.

Test if a value is an email address.

Test if two double-precision floating-point numbers are the same value.

Test if a value is a numeric array.

Test if a value corresponds to a leap year in the Gregorian calendar.

Test if a value is an infinite number.

Test if a value is an even number.

Test if a value is falsy.

Test if two arguments are both Complex64Arrays and have the same values.

Test if a value is an array-like object containing only positive numbers.

Test if a value is a 2-dimensional ndarray-like object containing double-precision floating-point numbers.

Test if an object's own and inherited property is readable and writable.

Test if a value is a number having a negative integer value.

Test whether an object contains a nested key path, either own or inherited.

Test if a value is a 64-bit complex number.

Test if a value is a MultiSlice object.

Test if two single-precision floating-point numbers are the same value.

Test if a value is equal to negative zero.

Test if a value is an array-like object containing only falsy values.

Test if two single-precision floating-point numbers are the same value.

Test if a value is a RangeError object.

Test if a value is an array-like object containing only truthy values.

Test if a value is a skew-persymmetric matrix.

Test if a value is a ReferenceError object.

Test if two arguments are the same value.

Test whether a string contains only numeric digits.

Test if a value is equal to positive zero.

Test if a value is an alphagram.

Test if a value is a SyntaxError object.

Test if a value is a 1-dimensional ndarray-like object containing double-precision floating-point numbers.

Test if a value is a centrosymmetric matrix.

Test if a value is a symmetric matrix.

Test if a value is a blank string.

Test whether an object contains a nested key path.

Test whether a string contains only alphanumeric characters.

Test if a value is a prime number.

Boolean indicating if the current environment is a mobile device.

Test if a value is an alphagram.

Test if a value is a finite number.

Test if a value is a class.

Test if a value is a 128-bit complex number.

Test if a value is a JavaScript boxed primitive.

Test if a value is a persymmetric matrix.

Test if a value is a skew-centrosymmetric matrix.

Test if a value is a UNC path.

Test if a value is complex-typed-array-like.

Test whether a string contains only white space characters.

Check if the runtime is a web worker.

Test if a value is a binary string.

Test whether a string contains only hexadecimal digits.

Test if a value is a relative path.

Test if a value is Node duplex stream-like.

Test if a value is a UNC path.

Test if a value is an array-like object containing only Date objects.

Test if a value is an empty object.

Test if a value is between two values.

Test if a value is an array-like object containing only nonpositive integers.

Test if a value is a number having a nonpositive integer value.

Test if a value is truthy.

Boolean indicating if the current environment is a touch device.

Test if a value is an array-like object containing only plain objects.

Test if a value is an array-like object where every element is between two values.

Test if a value is a BigUint64Array.

Test if a value is a non-symmetric matrix.

Test if a value is a SharedArrayBuffer.

Test if a value is a composite number.

Test if an object's own property is readable and writable.

Test if a value is a 1-dimensional ndarray-like object containing single-precision floating-point numbers.

Test if an object's own or inherited property is non-configurable.

Test if an object's own property is non-configurable.

Test if a value is Node transform stream-like.

Test if a value is a skew-symmetric matrix.

Test if a value is a valid array length.

Test if a value is an anagram.

Test if a value is an array-like object containing only symbols.

Test if an object's own property is non-enumerable.

Test if a value is a BigInt64Array.

Test if a value is a triangular number.

Test if a value is an EvalError object.

Test if a value is a 1-dimensional ndarray-like object containing double-precision complex floating-point numbers.

Test if a value is a square number.

Test if a value is an empty array-like object.

Test if a value is a square triangular number.

Test whether a string contains only alphanumeric characters.

Test if a value is an odd number.

Test if a value is a duration string.

Test if a value is an ndarray-like object containing double-precision floating-point numbers.

Test if an object's own or inherited property is readable.

Test if a value is a number having a nonpositive value.

Test whether a value is a relative URI.

Test if a value is an array-like object supporting the accessor (get/set) protocol.

Test if a value corresponds to a leap year in the Gregorian calendar.

Test if a value is a startcase string.

Test if a value is a cube number.

Test if a value is an absolute path.

Test if a value is a lowercase string.

Test whether a character belongs to the ASCII character set and whether this is true for all characters in a provided string.

Test if a value is a binary string.

Test if a value is a startcase string.

Test if a value is generator object-like.

Test if a value is a 64-bit or 128-bit complex number.

Test if a value is a TypeError object.

Test whether a string contains only hexadecimal digits.

Test if a value is a valid typed array length.

Test if a value is a native function.

Test if a value is an array-like object containing only NaN values.

Test if a value is an array containing a circular reference.

Test if two arguments have the same native class.

Test if a value is an empty string.

Test if a value is a number having a finite positive value.

Test whether a value is an absolute URI.

Test if two values are both Date objects corresponding to the same date and time.

Test if a value is a blank string.

Test if a value is a generator object.

Test if a value is Node readable stream-like.

Test whether a value is a relative URI.

Check if an environment is big endian.

Test if a value is the current year.

Test if an object's own property is writable.

Test if a value is an ndarray-like object containing double-precision complex floating-point numbers.

Test whether a string matches a Node.js built-in module name.

Test if a value is an ndarray-like object containing single-precision floating-point numbers.

Test if a value is an array-like object containing only null values.

Check if the runtime is the Electron renderer process.

Test if a value is an array-like object containing only nonnegative numbers.

Test if a value is an arrow function.

Test if an object's own property is readable.

Test if a value is a 1-dimensional ndarray-like object containing single-precision complex floating-point numbers.

Test if a value is an array-like object containing only finite numbers.

Test if a value is a lowercase string.

Test if a value is an array-like object containing only safe integers.

Check if an environment is little endian.

Test if a value is an uppercase string.

Test if an object's own or inherited property has a data descriptor.

Test whether a string contains only white space characters.

Test if a value is a camelcase string.

Test if a value is a regular expression string.

Test if two arguments are both double-precision complex floating-point numbers and have the same value.

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

Test if a value is a string in snake case.

Test if a value is a string in Pascal case.

Assertion utility tools.