JavaScript implements sample code analysis for replacing the last character in a string

This article describes how to replace the last character in a string in JavaScript, involving the operation skills related to conversion and operation of javascript strings, for more information about how to replace the last character in a string using JavaScript, refer to the next article. This article describes how to replace the last character in a string using javascript, and describes the operation skills related to conversion and operation of JavaScript strings. For more information, see

This example describes how to replace the last character in a string using JavaScript. We will share this with you for your reference. The details are as follows:

1. Problem background

In an input box, the length of a string is limited to 12 characters. Input a number on the keyboard to replace the last character in the string. For example, if you enter 111111111111, another 3 character will display 111111111113 characters.

2. Specific implementation

 Replace the last character in the string with JavaScript