know if a input number is in a empty array javascript code example

Example 1: javascript not empty array not string

if (Array.isArray(array) && array.length) {
    // array exists and is not empty
}

Example 2: javascript is array empty

var colors=[];
if(!colors.length){
	// I am empty
}else{
	// I am not empty
}

Example 3: check row empty array javascript

if(array && array.length){   
   // not empty 
} else {
   // empty
}