How to Decode Unicode-Escaped Strings in JavaScript?

Decoding Unicode-Escaped Strings in JavaScript

Decoding Unicode-escaped strings can pose challenges when the escape mechanism is not readily identifiable. This article explores how to efficiently decode such strings using JavaScript.

A common scenario is when a substring is obtained from a source string that contains Unicode escapes, such as "httpu00253Au00252Fu00252Fexample.com." The objective is to convert this escaped string into its plain text form, such as "http://example.com."

While basic decoding functions like unescape, decodeURI, and decodeURIComponent may not suffice in this situation, a robust approach is available:

decodeURIComponent(JSON.parse('"http\u00253A\u00252F\u00252Fexample.com"'));
// Output: 'http://example.com'

By parsing the string within a JSON object, we offload the decoding task to the JSON.parse function, which can efficiently handle Unicode escapes.

To ensure broader compatibility, consider using the updated method:

decodeURIComponent(JSON.parse('"%htt%p%3A%2F%2F%%example%2Ecom%"'));
// Output: 'http://%example.com%'

The above is the detailed content of How to Decode Unicode-Escaped Strings in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!