How to Properly Handle Newlines in JSON to Avoid Parsing Errors?

Handling Newlines in JSON: Avoid Evaluation Headaches

When working with JSON data in JavaScript, it becomes essential to handle newlines effectively to avoid parsing errors. Consider the following example where an attempt to convert JSON data containing newlines into an object fails using both eval and JSON.parse:

var data = '{"count" : 1, "stack" : "sometext\n\n"}';
var dataObj = eval('('+data+')');  // This approach is discouraged

The issue stems from the presence of newlines (n) in the string, which are misinterpreted as line breaks within the JSON data, causing the evaluation process to terminate prematurely and generate "unterminated string literal" errors.

To rectify this problem and successfully convert the JSON data into an object, it is crucial to escape the newline characters by doubling them. This ensures that the newlines are preserved as part of the JSON data and not interpreted as line breaks. The corrected code would look like this:

var data = '{"count" : 1, "stack" : "sometext\n\n"}';
var dataObj = JSON.parse(data);

Escaping the newline characters allows the JSON parser to correctly interpret the data and create the desired object without encountering any parsing errors.

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