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json-parse-even-better-errors
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Package description
The json-parse-even-better-errors package is an npm package that provides an improved JSON.parse function. It offers better error messages than the default JSON.parse, making it easier to debug issues with JSON data. It can pinpoint the exact location and cause of the error in the JSON string.
Improved error messages
This feature enhances the error messages provided by JSON.parse. In the code sample, if the JSON is invalid, it will throw an error with a message that includes the position and reason for the failure, making it easier to identify and fix the issue.
const parseJSON = require('json-parse-even-better-errors');
try {
const obj = parseJSON('{"foo": "bar", "baz": }');
} catch (e) {
console.error(e.message);
}
This package offers a safe way to parse JSON strings without try-catch blocks. It returns an object with an error and value property. It is similar to json-parse-even-better-errors in providing a safer JSON parsing experience but does not focus on detailed error messages.
Secure-json-parse provides safe parsing of JSON strings, protecting against prototype pollution attacks. It is similar to json-parse-even-better-errors in that it enhances the JSON parsing process, but it focuses on security rather than error message clarity.
Parse-json is another JSON parsing library that provides more informative error messages with a clear indication of where the parsing failed. It is similar to json-parse-even-better-errors in its goal to provide better error messages, but it may differ in implementation and the exact output of the errors.
Readme
json-parse-even-better-errors
is a Node.js library for
getting nicer errors out of JSON.parse()
, including context and position of the parse errors.
$ npm install --save json-parse-even-better-errors
const parseJson = require('json-parse-even-better-errors')
parseJson('"foo"')
parseJson('garbage') // more useful error message
parse(txt, reviver = null, context = 20)
Works just like JSON.parse
, but will include a bit more information when an
error happens. This throws a JSONParseError
.
class JSONParseError(er, text, context = 20, caller = null)
Extends the JavaScript SyntaxError
class to parse the message and provide
better metadata.
Pass in the error thrown by the built-in JSON.parse
, and the text being
parsed, and it'll parse out the bits needed to be helpful.
context
defaults to 20.
Set a caller
function to trim internal implementation details out of the
stack trace. When calling parseJson
, this is set to the parseJson
function. If not set, then the constructor defaults to itself, so the
stack trace will point to the spot where you call new JSONParseError
.
FAQs
JSON.parse with context information on error
The npm package json-parse-even-better-errors receives a total of 31,085,661 weekly downloads. As such, json-parse-even-better-errors popularity was classified as popular.
We found that json-parse-even-better-errors demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 6 open source maintainers collaborating on the project.
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