js-时间戳标量类型?

有一个NPM包,包含一组RFC 3339兼容的日期/时间图ql标量类型; graphql-iso-date .

GraphQLScalarType 要以编程方式在GraphQL中构建自己的标量类型,请执行以下操作:

/** Kind is an enum that describes the different kinds of AST nodes. */
import { Kind } from 'graphql/language';
import { GraphQLScalarType } from 'graphql';

const TimestampType = new GraphQLScalarType({
  name: 'Timestamp',
  serialize(date) {
    return (date instanceof Date) ? date.getTime() : null
  },
  parseValue(date) {
    try           { return new Date(value); }
    catch (error) { return null; }
  },
  parseLiteral(ast) {
    if (ast.kind === Kind.INT) {
      return new Date(parseInt(ast.value, 10));
    }
    else if (ast.kind === Kind.STRING) {
      return this.parseValue(ast.value);
    }
    else {
      return null;
    }
  },
});

但这次不是重新发明轮子( #550 GraphQLTimestamp.js 解决方案(我的 TimestampType