lang | API Reference | ArcGIS Maps SDK for JavaScript 4.30

lang

AMD: require(["esri/core/lang"], (esriLang) => { /* code goes here */ });

ESM: import * as esriLang from "@arcgis/core/core/lang.js";

Object: esri/core/lang

Since: ArcGIS Maps SDK for JavaScript 4.0

Provides a utility method for deeply cloning objects with properties that are computed or have their own clone() method, such as Extent.

Method Overview

Name	Return Type	Summary	Object
	Object	Use this method to deeply clone objects with properties that are computed or have their own `clone()` method.	lang

Method Details

clone Method clone(elem){Object}

Use this method to deeply clone objects with properties that are computed or have their own clone() method. For example, if you are creating an object that stores an initial extent and a spatial reference for your application, you can use esriLang.clone(initialProps) to clone this object so that the extent and spatialReference are properly cloned.

Parameter

elem Object

The object to be cloned.

Returns

Type	Description
Object	A clone of the object.

Example

require(["esri/core/lang"], function(esriLang) {
 let initialProps = {
  extent: appExtent, // app initial extent
  spatialReference: spatReference // app spatialReference
 };
 // Creates a deep clone of the object
 let clonedInitialProps = esriLang.clone(initialProps);
});