In this article we will learn how to check if a string includes substring in JavaScript.
It is very common to check if a string includes substring in JavaScript in JavaScript.
Problem
Now we have a problem which is that we want to check if a string includes substring or not.
Now let's imagine that we have an string like this:
"Hello In JavaScript World!!"
And want to check if this string contains "JavaScript"
or not.
How to solve this problem?
Solving this problem is easy, especially because there is a function called includes
that does everything for us.
The includes()
method returns true
if the substring is contained in the string. Otherwise, false
is returned.
Check if a string includes substring
As we said before, we can use includes
to check if a string contains substring or not.
Let's see an example
// String
const string = "Hello In JavaScript World!!";
// Check
const check = string.includes("JavaScript");
// Result:
console.log(check);
Output
true
And when we know the return value from the method (True
or false
), we can write lines of code based on that value.
// String
const string = "Hello In JavaScript World!!";
const check = string.includes("JavaScript");
// If `true`
if (check)
{
console.log('Yay!');
}
// If `false`
else
{
console.log('Ops!')
}
Output
Yay!
Thank you for reading
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