#Javascript #JavaScript / Object / Array.concat() / Add elements or arrays to an existing array to create a new array .concat() You can use the .concat() property to add elements or arrays to an existing array to create a new array. grammar var jbAry2 = jbAry1.concat( 'abc' ); Add the string abc to the jbAry1 array to create the jbAry2 array. var jbAry3 = jbAry1.concat( jbAry2 ); Sum two arrays ..