Now let’s see a sample which tells whether a function has certain arguments. var string = 'thewebjuice' console.log(string.includes('web')) // True Using Includes() as Generic MethodĪs we have discussed, includes() is a generic function and here we will see the sample of the same. You can also check whether a simple string contains a sub string as well.

Check whether a String includes() a Sub String So in this way you can easily find whether there is a certain data that is contained at a specific index. The index refers to the data at the given index. var Names = // includes(data_value,fromIndex) console.log(Names.includes('bob',0)) // True console.log(Names.includes('jane',3)) // FalseĪs we can see that we can pass the data as well as the index which we want to search for. Let’s have a look at how we can check this out. In certain cases when we want to see whether there is a data point on a specific index. Finding whether an element exists in a specified index This way it returns back a boolean value telling us whether something exists in the array or not. You can see how the array of numbers can be used to test what is being included in the array. var Numbers = console.log(Numbers.includes(1)) // True console.log(Numbers.includes(43)) // False

Finding whether an element exists in an ArrayĪ simple example for using include is as follows, there can be nothing simpler as such. It intern returns a boolean value determining whether the value is present or not. This function is a generic function and works with any array like objects. Determining whether an array contains a given data point or value can be easily done using javascript Function called includes().

Array contains javascript