How Do I Chop/Slice/Trim off Last Character in String Using Javascript?

When working with strings in JavaScript, you may come across a situation where you need to remove the last character from a string. There are several ways to achieve this, and in this blog post, we will explore three different solutions.

Solution 1: Using the slice() method

The slice() method in JavaScript allows you to extract a portion of a string based on the specified start and end indexes. To remove the last character from a string, you can use the slice() method with a negative index as the end parameter.

// Example string
const str = "Hello World!";

// Remove the last character using slice()
const newStr = str.slice(0, -1);

console.log(newStr);

The output of the above code will be:

Hello World

Solution 2: Using the substring() method

The substring() method is similar to the slice() method, but it doesn’t support negative indexes. However, you can still achieve the desired result by passing the length of the string minus 1 as the end parameter.

// Example string
const str = "Hello World!";

// Remove the last character using substring()
const newStr = str.substring(0, str.length - 1);

console.log(newStr);

The output of the above code will be:

Hello World

Solution 3: Using the substr() method

The substr() method is similar to the slice() method, but it uses the start index and the length of the substring as parameters. To remove the last character from a string, you can pass the length of the string minus 1 as the start index and omit the length parameter.

// Example string
const str = "Hello World!";

// Remove the last character using substr()
const newStr = str.substr(0, str.length - 1);

console.log(newStr);

The output of the above code will be:

Hello World

These are three different ways to chop, slice, or trim off the last character from a string using JavaScript. You can choose the method that best suits your needs and implement it in your code.