typescript TypeError: js_schema_1.default is not a function about js-schema HOT 1 OPEN

declare module 'js-schema'
{
    function schema(definition: any): schema.Schema;

    namespace schema {
        interface Schema {
            (obj: any): boolean; // test obj against the schema
        }

        interface NumberConstructor {
            min(n: number): NumberConstructor;
            max(n: number): NumberConstructor;
            below(n: number): NumberConstructor;
            above(n: number): NumberConstructor;
            step(n: number): NumberConstructor;
        }

        interface StringConstructor {
            of(charset: string): StringConstructor;
            of(length: number, charset: string): StringConstructor;
            of(minLength: number, maxLength: number, charset: string): StringConstructor;
        }

        interface ArrayConstructor {
            like(arr: Array<any>): ArrayConstructor;
            of(pattern: any): ArrayConstructor;
            of(length: number, pattern: any): ArrayConstructor;
            of(minLength: number, maxLength: number, pattern: any): ArrayConstructor;
        }

        interface ObjectConstructor {
            like(obj: any): ObjectConstructor;
            reference(obj: any): ObjectConstructor;
        }

        interface FunctionConstructor {
            reference(func: Function): FunctionConstructor;
        }
    }

    export = schema;
}