I attempted the following code snippet:
console.log(JSON.stringify({ test: "\u30FCabc" }));
The result is as follows:
'{"test":"ーabc"}'
We are aware that primarily, the JSON.stringify() method converts a JavaScript object or value into a JSON string. According to the JSON standard (https://www.json.org/json-en.html), we should be able to store \u30FC. So why does "\u30FC" get converted to "ー"?
So, why does "\u30FC" get converted to "ー"?
JSON.stringify.JSON.stringify encodes the object into JSON format and represents the character "ー" literally because the function is designed to prioritize literal characters over escape sequences when formatting JSON data.With some JSON encoding systems, like PHP for example, you have more control over this conversion:
<?php echo json_encode('ーabc', JSON_UNESCAPED_UNICODE); ?>
Compared to:
<?php echo json_encode('ーabc'); ?>
However, unlike PHP, JavaScript's JSON.stringify doesn't provide an option to customize this behavior.
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