How to Parse JSON Strings with Single Quotes Instead of Double Quotes?

Parsing JSON with Single Quotes

When attempting to parse a string containing JSON data, you may encounter errors if the string uses single quotes instead of double quotes. The JSON standard mandates the use of double quotes, making it incompatible with single quotes.

To resolve this issue, there are two potential solutions:

Method 1: Replace Single Quotes with Double Quotes

If your JSON is relatively straightforward and contains no escaped single quotes, you can utilize JavaScript's replace() method to convert all single quotes to double quotes. This will transform your JSON string into a format that complies with the JSON standard.

const str = "{'a':1}";
const newStr = str.replace(/'/g, '"');
console.log(JSON.parse(newStr));

Method 2: Use a Custom JSON Parser

Alternatively, if your JSON contains complex structures or escaped single quotes, you can construct a custom JSON parser to accommodate the different quoting style. This approach requires you to manually define the rules for parsing JSON objects, including the handling of single quotes.

However, this approach is more complex and error-prone compared to simply converting single quotes to double quotes.

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