How to Fix 'Unexpected Token' Errors When Parsing JSON Strings with Single Quotes?

Parsing Strings as JSON with Single Quotes

When attempting to parse a string as JSON using the JSON.parse() function, an "Unexpected token" error may occur if the string contains single quotes instead of double quotes. This is because the JSON standard mandates double quotes for keys and values.

To resolve this issue, the string must be modified to replace all single quotes with double quotes. In cases where the string contains no escaped single quotes (an atypical scenario in JSON), a simple regular expression replacement can be used:

str.replace(/'/g, '"')

This substitution will convert all single quotes in the string to double quotes, making it compliant with the JSON standard and allowing it to be parsed correctly.

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