Join multiple array in javascript


var arr1 = [ 1, 2, 3 ];
var arr2 = [ 4, 5, 6 ];
var arr3 = [ 7, 8, 9 ];
var wholeArray = arr1.concat( arr2,arr3,arr1 ); // [1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3]
console.log(wholeArray);

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