want to parse json in javascript and it has numbers larger than Number.MAX_SAFE_INTEGER?
well, you just simply,<code>const isBigNumber = num => !Number.isSafeInteger(+num)<br><br>const enquoteBigNumber = (jsonString, bigNumChecker) =><br> jsonString<br> .replaceAll(<br> /([:\s\[,]*)(\d+)([\s,\]]*)/g,<br> (matchingSubstr, prefix, bigNum, suffix) =><br> bigNumChecker(bigNum)<br> ? `${prefix}"${bigNum}"${suffix}`<br> : matchingSubstr<br> )<br><br>const parseWithBigInt = (jsonString, bigNumChecker) =><br> JSON.parse(<br> enquoteBigNumber(jsonString, bigNumChecker),<br> (key, value) =><br> !isNaN(value) && bigNumChecker(value)<br> ? BigInt(value)<br> : value<br> )<br><br>const output = parseWithBigInt(input, isBigNumber)<br></code>
solo
npub1hl…6qven
2026-08-14 23:14:01 UTC
in reply to nevent1q…8rkc
Author Public Key
npub1hllq64qeth88xc97gt9l734sflguy6mxrt7hq8w2jtc6r8lvm8qsn6qvenPublished at
2026-08-14 23:14:01 UTCEvent JSON
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"content": "want to parse json in javascript and it has numbers larger than Number.MAX_SAFE_INTEGER?\nwell, you just simply,\u003ccode\u003econst isBigNumber = num =\u0026gt; !Number.isSafeInteger(+num)\u003cbr\u003e\u003cbr\u003econst enquoteBigNumber = (jsonString, bigNumChecker) =\u0026gt;\u003cbr\u003e jsonString\u003cbr\u003e .replaceAll(\u003cbr\u003e /([:\\s\\[,]*)(\\d+)([\\s,\\]]*)/g,\u003cbr\u003e (matchingSubstr, prefix, bigNum, suffix) =\u0026gt;\u003cbr\u003e bigNumChecker(bigNum)\u003cbr\u003e ? `${prefix}\"${bigNum}\"${suffix}`\u003cbr\u003e : matchingSubstr\u003cbr\u003e )\u003cbr\u003e\u003cbr\u003econst parseWithBigInt = (jsonString, bigNumChecker) =\u0026gt;\u003cbr\u003e JSON.parse(\u003cbr\u003e enquoteBigNumber(jsonString, bigNumChecker),\u003cbr\u003e (key, value) =\u0026gt;\u003cbr\u003e !isNaN(value) \u0026amp;\u0026amp; bigNumChecker(value)\u003cbr\u003e ? BigInt(value)\u003cbr\u003e : value\u003cbr\u003e )\u003cbr\u003e\u003cbr\u003econst output = parseWithBigInt(input, isBigNumber)\u003cbr\u003e\u003c/code\u003e",
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