@cesium/engine/Source/Core/defined.js

CesiumJS is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.

/**
 * @function
 *
 * @param {*} value The object.
 * @returns {boolean} Returns true if the object is defined, returns false otherwise.
 *
 * @example
 * if (Cesium.defined(positions)) {
 *      doSomething();
 * } else {
 *      doSomethingElse();
 * }
 */
function defined(value) {
  return value !== undefined && value !== null;
}
export default defined;