graphql-compose/es/utils/is.js

GraphQL schema builder from different data sources with middleware extensions.

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

export function isString(value) {
  return typeof value === 'string';
}

export function isObject(value) {
  return (typeof value === 'undefined' ? 'undefined' : _typeof(value)) === 'object' && !Array.isArray(value) && value !== null;
}

export function isFunction(value) {
  return !!(value && value.constructor && value.call && typeof value === 'function' && value.apply);
}