forked from olcxjas-softworks/LarpixClient
112 lines
2.6 KiB
Markdown
112 lines
2.6 KiB
Markdown
# serialize-error
|
|
|
|
> Serialize/deserialize an error into a plain object
|
|
|
|
Useful if you for example need to `JSON.stringify()` or `process.send()` the error.
|
|
|
|
## Install
|
|
|
|
```
|
|
$ npm install serialize-error
|
|
```
|
|
|
|
## Usage
|
|
|
|
```js
|
|
const {serializeError, deserializeError} = require('serialize-error');
|
|
|
|
const error = new Error('🦄');
|
|
|
|
console.log(error);
|
|
//=> [Error: 🦄]
|
|
|
|
const serialized = serializeError(error)
|
|
|
|
console.log(serialized);
|
|
//=> {name: 'Error', message: '🦄', stack: 'Error: 🦄\n at Object.<anonymous> …'}
|
|
|
|
const deserialized = deserializeError(serialized);
|
|
|
|
console.log(deserialized);
|
|
//=> [Error: 🦄]
|
|
```
|
|
|
|
## API
|
|
|
|
### serializeError(value, options?)
|
|
|
|
Type: `Error | unknown`
|
|
|
|
Serialize an `Error` object into a plain object.
|
|
|
|
Non-error values are passed through.
|
|
Custom properties are preserved.
|
|
Non-enumerable properties are kept non-enumerable (name, message, stack).
|
|
Enumerable properties are kept enumerable (all properties besides the non-enumerable ones).
|
|
Buffer properties are replaced with `[object Buffer]`.
|
|
Circular references are handled.
|
|
If the input object has a `.toJSON()` method, then it's called instead of serializing the object's properties.
|
|
It's up to `.toJSON()` implementation to handle circular references and enumerability of the properties.
|
|
|
|
`.toJSON` example:
|
|
|
|
```js
|
|
class ErrorWithDate extends Error {
|
|
constructor() {
|
|
super();
|
|
this.date = new Date();
|
|
}
|
|
}
|
|
const error = new ErrorWithDate();
|
|
serializeError(date);
|
|
// => {date: '1970-01-01T00:00:00.000Z', name, message, stack}
|
|
|
|
class ErrorWithToJSON extends Error {
|
|
constructor() {
|
|
super('🦄');
|
|
this.date = new Date();
|
|
}
|
|
|
|
toJSON() {
|
|
return serializeError(this);
|
|
}
|
|
}
|
|
const error = new ErrorWithToJSON();
|
|
console.log(serializeError(error));
|
|
// => {date: '1970-01-01T00:00:00.000Z', message: '🦄', name, stack}
|
|
```
|
|
|
|
### deserializeError(value, options?)
|
|
|
|
Type: `{[key: string]: unknown} | unknown`
|
|
|
|
Deserialize a plain object or any value into an `Error` object.
|
|
|
|
`Error` objects are passed through.
|
|
Non-error values are wrapped in a `NonError` error.
|
|
Custom properties are preserved.
|
|
Circular references are handled.
|
|
|
|
### options
|
|
|
|
Type: `object`
|
|
|
|
#### maxDepth
|
|
|
|
Type: `number`\
|
|
Default: `Number.POSITIVE_INFINITY`
|
|
|
|
The maximum depth of properties to preserve when serializing/deserializing.
|
|
|
|
```js
|
|
const {serializeError} = require('serialize-error');
|
|
|
|
const error = new Error('🦄');
|
|
error.one = {two: {three: {}}};
|
|
|
|
console.log(serializeError(error, {maxDepth: 1}));
|
|
//=> {name: 'Error', message: '…', one: {}}
|
|
|
|
console.log(serializeError(error, {maxDepth: 2}));
|
|
//=> {name: 'Error', message: '…', one: { two: {}}}
|
|
```
|