@grafana/faro-core/dist/esm/utils/is.js

Core package of Faro.

export function isTypeof(value, type) {
    return typeof value === type;
}
export function isToString(value, type) {
    return Object.prototype.toString.call(value) === `[object ${type}]`;
}
export function isInstanceOf(value, reference) {
    try {
        return value instanceof reference;
    }
    catch (_err) {
        return false;
    }
}
export const isUndefined = ((value) => isTypeof(value, 'undefined'));
export const isNull = ((value) => isTypeof(value, 'null'));
export const isString = ((value) => isTypeof(value, 'string'));
export const isNumber = ((value) => (isTypeof(value, 'number') && !isNaN(value)) || isTypeof(value, 'bigint'));
export const isInt = ((value) => isNumber(value) && Number.isInteger(value));
export const isBoolean = ((value) => isTypeof(value, 'boolean'));
export const isSymbol = ((value) => isTypeof(value, 'symbol'));
export const isObject = ((value) => !isNull(value) && isTypeof(value, 'object'));
export const isFunction = ((value) => isTypeof(value, 'function'));
export const isArray = ((value) => isToString(value, 'Array'));
export const isRegExp = ((value) => isToString(value, 'RegExp'));
export const isThenable = ((value) => isFunction(value === null || value === void 0 ? void 0 : value.then));
export const isPrimitive = ((value) => !isObject(value) && !isFunction(value));
export const isEventDefined = typeof Event !== 'undefined';
export const isEvent = ((value) => isEventDefined && isInstanceOf(value, Event));
export const isErrorDefined = typeof Error !== 'undefined';
export const isError = ((value) => isErrorDefined && isInstanceOf(value, Error));
export const isErrorEvent = ((value) => isToString(value, 'ErrorEvent'));
export const isDomError = ((value) => isToString(value, 'DOMError'));
export const isDomException = ((value) => isToString(value, 'DOMException'));
export const isElementDefined = typeof Element !== 'undefined';
export const isElement = ((value) => isElementDefined && isInstanceOf(value, Element));
export const isMapDefined = typeof Map !== 'undefined';
export const isMap = ((value) => isMapDefined && isInstanceOf(value, Map));
export const isSyntheticEvent = ((value) => isObject(value) &&
    'nativeEvent' in value &&
    'preventDefault' in value &&
    'stopPropagation' in value);
export function isEmpty(value) {
    if (value == null) {
        return true;
    }
    if (isArray(value) || isString(value)) {
        return value.length === 0;
    }
    if (isObject(value)) {
        return Object.keys(value).length === 0;
    }
    return false;
}
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