array check in javascript code example
Example 1: javascript check if is array
var colors=["red","green","blue"];
if(Array.isArray(colors)){
}
Example 2: js test if array
if(Array.isArray(myVarToTest)) {
} else {
}
Example 3: how to check if item is in list js
var myList=["a", "b", "c"];
mylist.includes("d")
Example 4: js check if is array
if(Array.isArray(colors)){
}
Example 5: javascript check if in array
var extensions = ["image/jpeg","image/png","image/gif"];
if(extensions.indexOf("myfiletype") === -1){
alert("Image must be .png, .jpg or .gif");
}