check if a variable is array in javascript

if(Array.isArray(myVarToTest)) {
	// myVatToTest is an array
} else {
	// myVarToTest is not an array
}// inside if else check
if(Array.isArray(myVarToTest)) {
	// myVatToTest is an array
} else {
	// myVarToTest is not an array
}var colors=["red","green","blue"];

if(Array.isArray(colors)){
    //colors is an array
}