Overview

This issue tracks the addition of try-catch blocks in src/social-share-button.js to improve error handling and resilience. Adding defensive error handling in key methods ensures that unexpected failures are caught and surfaced appropriately, rather than silently failing or causing unhandled exceptions.

Try-catch blocks to add

1. createButton() → document.querySelector()

querySelector() throws a SyntaxError when passed an invalid CSS selector string. Since the selector is user-supplied via options.container, a try-catch here is appropriate defensive programming.

2. fallbackCopy() → rename _err → error and add logging

The existing catch block silently swallows errors. Binding the error variable and logging it through the debug-gated _debugWarn() helper is a valid improvement.

Acceptance Criteria

• Add try-catch in createButton() around document.querySelector() with _debugWarn logging
• Update the fallbackCopy() catch block to bind the error variable and log it via _debugWarn()