Why Does jQuery.parseJSON Throw \'Invalid JSON\' for Escaped Single Quotes?

jQuery.parseJSON Encounters "Invalid JSON" Error Due to Escaped Single Quote in JSON

When using jQuery.post() to retrieve JSON objects, it's crucial to avoid using single quote (') characters within string values, or you may encounter an error during parsing.

Parsing Single Quotes in JSON

According to the JSON specification, only double-quote characters can be escaped within strings. Single quote characters do not require escaping.

jQuery's JSON Parsing

jQuery attempts to use the browser's native JSON parser or json2.js library for parsing JSON. Unfortunately, these implementations strictly adhere to the JSON specification and do not support single quotes or their escaping. Therefore, jQuery will report the JSON as invalid if it contains such characters.

Handling Single Quotes in JSON

To avoid this issue, you should use double quotes (") to enclose string values within JSON objects. This ensures that the JSON is fully compliant with the specification and can be parsed successfully by jQuery.

Additional Information

While the JSON specification does not explicitly prohibit escaped single quotes, some implementations may choose to accept them for greater flexibility. However, it is strongly recommended to stick to the official specification to ensure interoperability and avoid compatibility issues.

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