How to Delete First and Last Character in String in Javascript
In this tutorial, you will learn how to delete first and last character in string in javascript. A string is a collection of random characters, and the start and last characters in a string may or may not be letters, integers, or special characters. Only when a character is no longer necessary, it should be dropped. From a developer perspective, it can be a bit tricky to delete first and last character in string.
There are numerous ways to delete first and last character in string. A string consists of multiple characters and these characters in a string have a 0-based index. To trim a string to a particular length, we can make use of the slice()
method.
The slice()
method takes 2 parameters and they basically specify starting and ending index number of characters in a string for slicing purposes. The second parameter is optional and by default, it is considered to be the length of the string.
In the following example, we have one global variable that holds a string. Upon click of a button, we will delete first and last character in the string 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“Get”
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>Get</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 inbtnGet
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 calling the
slice()
method and passing 2 parameters; 1 and index of the last character. The number 1 is the index of second character in the string. To get the index of last character, we need to substract 1 from the length of the string. - As a result,
slice()
method will delete first and last character in string and the final string will be stored in theresult
variable. - We are displaying the
result
in theh1
element using theinnerText
property.
let btnGet = document.querySelector("button"); let output = document.querySelector("h1"); let myString = "wWeather is very cloudy todayy"; btnGet.addEventListener("click", () => { let result = myString.slice(1,,myString.length - 1); output.innerText = result; });