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golden-fleece
Advanced tools
Parse and manipulate JSON5 strings
Weekly downloads
Readme
Parse a JSON5 string (like JSON, but less strict).
For the Svelte REPL, where we want to allow arbitrary data in the bottom right-hand panel, but we also want to update the object without reformatting it as JSON.
Install it with npm install golden-fleece
and import it into your app:
import * as fleece from 'golden-fleece';
const ast = fleece.parse(`true`);
// { start: 0, end: 4, type: 'Literal', raw: 'true', value: true }
The returned AST is ESTree compliant.
You can optionally pass callbacks that are fired whenever a value or comment is encountered:
const ast = fleece.parse(str, {
onComment: comment => {
console.log('got a comment', comment);
},
onValue: value => {
console.log('got a value', value);
}
});
const { answer } = fleece.evaluate(`{ answer: 42 }`);
answer === 42; // true
This is where it gets fun:
const str = `
number: 1,
string: 'yes',
object: { nested: true },
array: ['this', 'that', 'the other']
`;
const object = fleece.evaluate(str);
object.number = 42;
object.array[2] = 'EVERYTHING';
fleece.patch(str, object) === `{
number: 42,
string: 'yes',
object: { nested: true },
array: ['this', 'that', 'EVERYTHING']
}`; // true
Notice that the formatting has been preserved.
const object = {
string: 'hello',
'quoted-property': 2,
array: [3, 4]
};
fleece.stringify(object) === `{
string: "hello",
"quoted-property": 2,
array: [
3,
4
]
}`; // true
To indent with spaces instead of tabs, pass spaces: n
, where n
is the number of spaces at each level of indentation.
fleece.stringify(object, {
spaces: 2
}) === `{
string: "hello",
"quoted-property": 2,
array: [
3,
4
]
}`; // true
To prefer single-quotes to double-quotes, pass singleQuotes: true
:
fleece.stringify(object, {
singleQuotes: true
}) === `{
string: 'hello',
'quoted-property': 2,
array: [
3,
4
]
}`; // true
FAQs
Parse and manipulate JSON5 strings
The npm package golden-fleece receives a total of 158,355 weekly downloads. As such, golden-fleece popularity was classified as popular.
We found that golden-fleece demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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