@amandaghassaei/type-checks/dist/type-checks.js

A collection of JavaScript type checks.

/**
 * Checks if value is a number (including Infinity).
 */
export function isNumber(value) {
    return !Number.isNaN(value) && typeof value === 'number';
}
/**
 * Checks if value is finite number.
 */
export function isFiniteNumber(value) {
    return isNumber(value) && Number.isFinite(value);
}
/**
 * Checks if value is integer.
 */
export function isInteger(value) {
    return isFiniteNumber(value) && (value % 1 === 0);
}
/**
 * Checks if value is positive number (> 0).
 */
export function isPositiveNumber(value) {
    return isNumber(value) && value > 0;
}
/**
 * Checks if value is positive integer (> 0).
 */
export function isPositiveInteger(value) {
    return isInteger(value) && value > 0;
}
/**
 * Checks if value is negative number (< 0).
 */
export function isNegativeNumber(value) {
    return isNumber(value) && value < 0;
}
/**
 * Checks if value is negative integer (< 0).
 */
export function isNegativeInteger(value) {
    return isInteger(value) && value < 0;
}
/**
 * Checks if value is non-negative number (>= 0).
 */
export function isNonNegativeNumber(value) {
    return isNumber(value) && value >= 0;
}
/**
 * Checks if value is non-negative integer (>= 0).
 */
export function isNonNegativeInteger(value) {
    return isInteger(value) && value >= 0;
}
/**
 * Checks if value is non-positive number (<= 0).
 */
export function isNonPositiveNumber(value) {
    return isNumber(value) && value <= 0;
}
/**
 * Checks if value is non-positive integer (<= 0).
 */
export function isNonPositiveInteger(value) {
    return isInteger(value) && value <= 0;
}
/**
 * Checks if value is number in range [min, max].
 */
export function isNumberInRange(value, min, max) {
    return isNumber(value) && value >= min && value <= max;
}
/**
 * Checks if value is integer in range [min, max].
 */
export function isIntegerInRange(value, min, max) {
    return isInteger(value) && value >= min && value <= max;
}
/**
 * Checks if value is string.
 */
export function isString(value) {
    return typeof value === 'string';
}
/**
 * Checks if value is TypedArray.
 */
export function isTypedArray(value) {
    return ArrayBuffer.isView(value) && !(value instanceof DataView);
}
/**
 * Checks if value is Array or TypedArray.
 */
export function isArray(value) {
    return Array.isArray(value) || isTypedArray(value);
}
/**
 * Checks if value is Javascript object.
 */
export function isObject(value) {
    return typeof value === 'object' && !isArray(value) && value !== null && !(value instanceof ArrayBuffer) && !(value instanceof DataView);
}
/**
 * Checks if value is boolean.
 */
export function isBoolean(value) {
    return typeof value === 'boolean';
}
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