50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
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/**
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* @since 2.10.0
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*/
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import { tryCatch } from './Either';
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import { identity } from './function';
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/**
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* Converts a JavaScript Object Notation (JSON) string into a `Json` type.
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*
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* @example
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* import * as J from 'fp-ts/Json'
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* import * as E from 'fp-ts/Either'
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* import { pipe } from 'fp-ts/function'
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*
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* assert.deepStrictEqual(pipe('{"a":1}', J.parse), E.right({ a: 1 }))
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* assert.deepStrictEqual(pipe('{"a":}', J.parse), E.left(new SyntaxError('Unexpected token } in JSON at position 5')))
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*
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* @since 2.10.0
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*/
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export var parse = function (s) { return tryCatch(function () { return JSON.parse(s); }, identity); };
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/**
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* Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
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*
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* @example
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* import * as E from 'fp-ts/Either'
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* import * as J from 'fp-ts/Json'
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* import { pipe } from 'fp-ts/function'
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*
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* assert.deepStrictEqual(J.stringify({ a: 1 }), E.right('{"a":1}'))
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* const circular: any = { ref: null }
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* circular.ref = circular
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* assert.deepStrictEqual(
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* pipe(
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* J.stringify(circular),
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* E.mapLeft(e => e instanceof Error && e.message.includes('Converting circular structure to JSON'))
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* ),
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* E.left(true)
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* )
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*
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* @since 2.10.0
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*/
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export var stringify = function (a) {
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return tryCatch(function () {
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var s = JSON.stringify(a);
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if (typeof s !== 'string') {
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throw new Error('Converting unsupported structure to JSON');
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}
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return s;
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}, identity);
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};
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