How to Check if String Contains Hyphen in Javascript
In this tutorial, you will learn how to check if string contains hyphen in javascript. In an English sentence, a hyphen is a short line (-) that indicates a connection between parts of a compound word. A word is divided into 2 parts for a certain purpose using a hyphen.
There are numerous ways to detect whether a string contains a hyphen or not. But for the sake of simplicity, we will use the includes()
method and ternary operator (?
) to accomplish our goal. The includes()
method is used to perform a case-sensitive search to detect whether a string contains another string or not and returns a Boolean value.
In the following example, we have one global variable that holds a string. Upon click of a button, we will check whether it contains a hyphen or not and display the result on the screen. Please have a look over the code example and the steps given below.
HTML & CSS
- We have 3 elements in the HTML file (
div
,button
, andh1
). Thediv
element is just a wrapper for the rest of the elements. - The
innerText
for thebutton
element is“Check”
and for theh1
element, it is“Result”
. - We have done some basic styling using CSS and added the link to our
style.css
stylesheet inside thehead
element. - We have also included our javascript file
script.js
with ascript
tag at the bottom.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <link rel="stylesheet" href="style.css"> <title>Document</title> </head> <body> <div class="container"> <button>Check</button> <h1>Result</h1> </div> <script src="script.js"></script> </body> </html>
.container { text-align: center; } button { margin-top: 10px; padding: 10px 20px; }
Javascript
- We have selected the
button
element andh1
element using thedocument.querySelector()
method and stored them inbtnCheck
andoutput
variables respectively. - We have attached a
click
event listener to thebutton
element. - We have a global variable
myString
which holds a string as its value. - In the event handler function, we are using the
includes()
method and ternary operator (?
) to verify whethermyString
contains a hyphen or not. Depending upon the result of the check, we will assign“Yes”
or“No”
to theresult
variable. - We are displaying the result in the
h1
element using theinnerText
property.
let btnCheck = document.querySelector("button"); let output = document.querySelector("h1"); let myString = "This is a case-senstive string."; btnCheck.addEventListener("click", () => { let result = myString.includes("-") ? "Yes" : "No"; output.innerText = result; });