How to replace the characters at index in a string based on String in JavaScript

This article mainly explains "how to replace the index characters in the string based on JavaScript based on String", interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to replace index characters in a string based on JavaScript String".

Core code:

String.prototype.replaceCharAt = function (n, c) {return this.substr (0, n) + c + this.substr;}

Usage example:

JS character substitution String.prototype.replaceCharAt = function (NMagazine c) {return this.substr (0, n) + c + this.substr (Nomi1meme this.milthMurray 1PUBN);} var str = 'welcome to www.jb51.net';console.log (str.replaceCharAt (8meme T'))

The running effect is as follows:

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