if object is array javascript
Array.isArray(object);
javascript check if is array
var colors=["red","green","blue"];
if(Array.isArray(colors)){
//colors is an array
}
how to check if item is in list js
var myList=["a", "b", "c"];
mylist.includes("d")//returns true or false
how to check if array
// Check if something is an Array
// just like you do with "typeof"
Array.isArray([1, 2, 3]); // true
Array.isArray('asdf'); // false
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