Merger

The merger is responsible for combining JSON Schema definitions, merging allOf compositions, and applying schema defaults to form data.

export interface Merger {
  mergeSchemas(a: Schema, b: Schema): Schema;
  /**
   * Merges schema and its `allOf` schemas into a single schema
   */
  mergeAllOf(schema: Schema): Schema;
}

export interface FormMerger extends Merger {
  /**
   * Merges defaults of `schema` into `formData`
   */
  mergeFormDataAndSchemaDefaults(
    formData: SchemaValue | undefined,
    schema: Schema
  ): SchemaValue | undefined;
}

Use createFormMerger from @sjsf/form/mergers/modern for most projects. The legacy merger is available for v2 compatibility.

Merger SetupLearn how to configure the merger for your project