Question 1

How to validate JSON with JSCK in Node.js?

Accepted Answer

Install via npm, require JSCK, and create a validator using new JSCK.draft4(schema) for Draft 4 or draft3 for Draft 3. Call the validate method on documents, which returns errors if invalid, as shown in the simple usage example.

Question 2

JSCK vs ajv: which JSON Schema validator is faster?

Accepted Answer

Benchmarks in the README indicate that ajv is generally faster for simple schemas, but JSCK's performance improves relative to others as schema complexity increases. For complex schemas, JSCK is competitive but not the absolute fastest.

Question 3

Does JSCK support JSON Schema Draft 6 or later?

Accepted Answer

No, JSCK only supports Draft 3 and Draft 4. For newer drafts like Draft 6 or 7, you need to use a different validator, as the project hasn't been updated for later specifications.

Question 4

How to handle multiple schemas with JSCK?

Accepted Answer

Each schema must have a top-level 'id' field with a URI for multi-schema validation. The advanced usage examples demonstrate this, but it's more complex than single-schema setups and requires careful URI management.

Question 5

What are the main limitations of JSCK for Draft 4?

Accepted Answer

Key limitations include lack of support for remote references (refRemote), uniqueItems, and proper handling of Unicode surrogate pairs for maxLength/minLength. These gaps are documented in the Coverage section.

Question 6

Can I use JSCK in a browser environment?

Accepted Answer

JSCK is built for Node.js and isn't designed for browser use. You would need to bundle it or find an alternative validator that supports client-side JavaScript, as it relies on Node.js-specific features.

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