diff --git a/index.js b/index.js
index 73e462f..803f21c 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,5 @@
 const types = require('./types/index.js')
-const BaseType = require('./types/base.js') // eslint-disable-line
+const validate = require('./validate.js')
 const validator = {}
 module.exports = validator
 
@@ -10,38 +10,9 @@ validator.boolean = () => new types.BooleanType()
 validator.array = () => new types.ArrayType()
 validator.object = () => new types.ObjectType()
 
-/**
- * @exports
- * @typedef SchemaField
- * @property {BaseType} type
- * @property {SchemaField} children
- */
-/**
- * @exports
- * @typedef {Object<string, SchemaField|BaseType>} Schema
- */
-
 /**
  * validate
  * @param {Object} src
- * @param {Schema} schema
+ * @param {import('./type.js').Schema} schema
  */
-validator.validate = function (src, schema) {
-  if (typeof src !== 'object' || typeof schema !== 'object') throw new Error('source or schema not object')
-
-  for (const it in schema) {
-    if (schema[it] instanceof BaseType) {
-      const result = schema[it].validate(src[it])
-      if (result) throw new Error(`field [${it}]: ${result}`)
-    } else if (typeof schema[it] === 'object' && 'type' in schema[it] && schema[it].type instanceof BaseType) {
-      const result = schema[it].type.validate(src[it])
-      if (result) throw new Error(`field [${it}]: ${result}`)
-    } else {
-      throw new Error('not get any check schema type')
-    }
-
-    if (typeof schema[it] === 'object' && 'children' in schema[it]) {
-      validator.validate(src[it], schema[it].children)
-    }
-  }
-}
+validator.validate = validate
diff --git a/package-lock.json b/package-lock.json
index 0040013..7b04474 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -767,6 +767,12 @@
         "acorn-walk": "^7.1.1"
       }
     },
+    "acorn-jsx": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.2.0.tgz",
+      "integrity": "sha512-HiUX/+K2YpkpJ+SzBffkM/AQ2YE03S0U1kjTLVpoJdhZMOWy8qvXVN9JdLqv2QsaQ6MPYQIuNmwD8zOiYUofLQ==",
+      "dev": true
+    },
     "acorn-walk": {
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-7.1.1.tgz",
@@ -785,6 +791,12 @@
         "uri-js": "^4.2.2"
       }
     },
+    "ajv-keywords": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.4.1.tgz",
+      "integrity": "sha512-RO1ibKvd27e6FEShVFfPALuHI3WjSVNeK5FIsmme/LYRNxjKuNj+Dt7bucLa6NdSv3JcVTyMlm9kGR84z1XpaQ==",
+      "dev": true
+    },
     "ansi-escapes": {
       "version": "4.3.1",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-4.3.1.tgz",
@@ -855,6 +867,17 @@
       "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=",
       "dev": true
     },
+    "array-includes": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/array-includes/-/array-includes-3.1.1.tgz",
+      "integrity": "sha512-c2VXaCHl7zPsvpkFsw4nxvFie4fh1ur9bpcgsVkIjqn0H/Xwdg+7fv3n2r/isyS8EBj5b06M9kHyZuIr4El6WQ==",
+      "dev": true,
+      "requires": {
+        "define-properties": "^1.1.3",
+        "es-abstract": "^1.17.0",
+        "is-string": "^1.0.5"
+      }
+    },
     "array-unique": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
@@ -906,6 +929,65 @@
       "integrity": "sha512-3YDiu347mtVtjpyV3u5kVqQLP242c06zwDOgpeRnybmXlYYsLbtTrUBUm8i8srONt+FWobl5aibnU1030PeeuA==",
       "dev": true
     },
+    "babel-code-frame": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
+      "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
+      "dev": true,
+      "requires": {
+        "chalk": "^1.1.3",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.2"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "2.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
+          "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
+          "dev": true
+        },
+        "chalk": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^2.2.1",
+            "escape-string-regexp": "^1.0.2",
+            "has-ansi": "^2.0.0",
+            "strip-ansi": "^3.0.0",
+            "supports-color": "^2.0.0"
+          }
+        },
+        "js-tokens": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.2.tgz",
+          "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls=",
+          "dev": true
+        },
+        "strip-ansi": {
+          "version": "3.0.1",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^2.0.0"
+          }
+        },
+        "supports-color": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
+          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
+          "dev": true
+        }
+      }
+    },
     "babel-jest": {
       "version": "26.0.1",
       "resolved": "https://registry.npmjs.org/babel-jest/-/babel-jest-26.0.1.tgz",
@@ -1101,6 +1183,23 @@
         "unset-value": "^1.0.0"
       }
     },
+    "caller-path": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/caller-path/-/caller-path-0.1.0.tgz",
+      "integrity": "sha1-lAhe9jWB7NPaqSREqP6U6CV3dR8=",
+      "dev": true,
+      "requires": {
+        "callsites": "^0.2.0"
+      },
+      "dependencies": {
+        "callsites": {
+          "version": "0.2.0",
+          "resolved": "https://registry.npmjs.org/callsites/-/callsites-0.2.0.tgz",
+          "integrity": "sha1-r6uWJikQp/M8GaV3WCXGnzTjUMo=",
+          "dev": true
+        }
+      }
+    },
     "callsites": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
@@ -1144,12 +1243,24 @@
       "integrity": "sha512-kWWXztvZ5SBQV+eRgKFeh8q5sLuZY2+8WUIzlxWVTg+oGwY14qylx1KbKzHd8P6ZYkAg0xyIDU9JMHhyJMZ1jw==",
       "dev": true
     },
+    "chardet": {
+      "version": "0.4.2",
+      "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.4.2.tgz",
+      "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=",
+      "dev": true
+    },
     "ci-info": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ci-info/-/ci-info-2.0.0.tgz",
       "integrity": "sha512-5tK7EtrZ0N+OLFMthtqOj4fI2Jeb88C4CAZPu25LDVUgXJ0A3Js4PMGqrn0JU1W0Mh1/Z8wZzYPxqUrXeBboCQ==",
       "dev": true
     },
+    "circular-json": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/circular-json/-/circular-json-0.3.3.tgz",
+      "integrity": "sha512-UZK3NBx2Mca+b5LsG7bY183pHWt5Y1xts4P3Pz7ENTwGVnJOUWbRb3ocjvX7hx9tq/yTAdclXm9sZ38gNuem4A==",
+      "dev": true
+    },
     "class-utils": {
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
@@ -1173,6 +1284,21 @@
         }
       }
     },
+    "cli-cursor": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-2.1.0.tgz",
+      "integrity": "sha1-s12sN2R5+sw+lHR9QdDQ9SOP/LU=",
+      "dev": true,
+      "requires": {
+        "restore-cursor": "^2.0.0"
+      }
+    },
+    "cli-width": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/cli-width/-/cli-width-2.2.1.tgz",
+      "integrity": "sha512-GRMWDxpOB6Dgk2E5Uo+3eEBvtOOlimMmpbFiKuLFnQzYDavtLFY3K5ona41jgN/WdRZtG7utuVSVTL4HbZHGkw==",
+      "dev": true
+    },
     "cliui": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-6.0.0.tgz",
@@ -1242,6 +1368,12 @@
       "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
       "dev": true
     },
+    "contains-path": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/contains-path/-/contains-path-0.1.0.tgz",
+      "integrity": "sha1-/ozxhP9mcLa67wGp1IYaXL7EEgo=",
+      "dev": true
+    },
     "convert-source-map": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.7.0.tgz",
@@ -1345,6 +1477,12 @@
         "ms": "^2.1.1"
       }
     },
+    "debug-log": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/debug-log/-/debug-log-1.0.1.tgz",
+      "integrity": "sha1-IwdjLUwEOCuN+KMvcLiVBG1SdF8=",
+      "dev": true
+    },
     "decamelize": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
@@ -1375,6 +1513,15 @@
       "integrity": "sha512-FJ3UgI4gIl+PHZm53knsuSFpE+nESMr7M4v9QcgB7S63Kj/6WqMiFQJpBBYz1Pt+66bZpP3Q7Lye0Oo9MPKEdg==",
       "dev": true
     },
+    "define-properties": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.3.tgz",
+      "integrity": "sha512-3MqfYKj2lLzdMSf8ZIZE/V+Zuy+BgD6f164e8K2w7dgnpKArBDerGYpM46IYYcjnkdPNMjPk9A6VFB8+3SKlXQ==",
+      "dev": true,
+      "requires": {
+        "object-keys": "^1.0.12"
+      }
+    },
     "define-property": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/define-property/-/define-property-2.0.2.tgz",
@@ -1416,6 +1563,28 @@
         }
       }
     },
+    "deglob": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/deglob/-/deglob-2.1.1.tgz",
+      "integrity": "sha512-2kjwuGGonL7gWE1XU4Fv79+vVzpoQCl0V+boMwWtOQJV2AGDabCwez++nB1Nli/8BabAfZQ/UuHPlp6AymKdWw==",
+      "dev": true,
+      "requires": {
+        "find-root": "^1.0.0",
+        "glob": "^7.0.5",
+        "ignore": "^3.0.9",
+        "pkg-config": "^1.1.0",
+        "run-parallel": "^1.1.2",
+        "uniq": "^1.0.1"
+      },
+      "dependencies": {
+        "ignore": {
+          "version": "3.3.10",
+          "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.10.tgz",
+          "integrity": "sha512-Pgs951kaMm5GXP7MOvxERINe3gsaVjUWFm+UZPSq9xYriQAksyhg0csnS0KXSNRD5NmNdapXEpjxG49+AKh/ug==",
+          "dev": true
+        }
+      }
+    },
     "delayed-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
@@ -1434,6 +1603,15 @@
       "integrity": "sha512-JC/eHYEC3aSS0vZGjuoc4vHA0yAQTzhQQldXMeMF+JlxLGJlCO38Gma82NV9gk1jGFz8mDzUMeaKXvjRRdJ2dg==",
       "dev": true
     },
+    "doctrine": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-2.1.0.tgz",
+      "integrity": "sha512-35mSku4ZXK0vfCuHEDAwt55dg2jNajHZ1odvF+8SSr82EsZY4QmXfuWso8oEd8zRhVObSN18aM0CjSdoBX7zIw==",
+      "dev": true,
+      "requires": {
+        "esutils": "^2.0.2"
+      }
+    },
     "domexception": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/domexception/-/domexception-2.0.1.tgz",
@@ -1485,6 +1663,36 @@
         "is-arrayish": "^0.2.1"
       }
     },
+    "es-abstract": {
+      "version": "1.17.5",
+      "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.17.5.tgz",
+      "integrity": "sha512-BR9auzDbySxOcfog0tLECW8l28eRGpDpU3Dm3Hp4q/N+VtLTmyj4EUN088XZWQDW/hzj6sYRDXeOFsaAODKvpg==",
+      "dev": true,
+      "requires": {
+        "es-to-primitive": "^1.2.1",
+        "function-bind": "^1.1.1",
+        "has": "^1.0.3",
+        "has-symbols": "^1.0.1",
+        "is-callable": "^1.1.5",
+        "is-regex": "^1.0.5",
+        "object-inspect": "^1.7.0",
+        "object-keys": "^1.1.1",
+        "object.assign": "^4.1.0",
+        "string.prototype.trimleft": "^2.1.1",
+        "string.prototype.trimright": "^2.1.1"
+      }
+    },
+    "es-to-primitive": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.2.1.tgz",
+      "integrity": "sha512-QCOllgZJtaUo9miYBcLChTUaHNjJF3PYs1VidD7AwiEj1kYxKeQTctLAezAOH5ZKRH0g2IgPn6KwB4IT8iRpvA==",
+      "dev": true,
+      "requires": {
+        "is-callable": "^1.1.4",
+        "is-date-object": "^1.0.1",
+        "is-symbol": "^1.0.2"
+      }
+    },
     "escape-string-regexp": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
@@ -1504,12 +1712,506 @@
         "source-map": "~0.6.1"
       }
     },
+    "eslint": {
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-5.4.0.tgz",
+      "integrity": "sha512-UIpL91XGex3qtL6qwyCQJar2j3osKxK9e3ano3OcGEIRM4oWIpCkDg9x95AXEC2wMs7PnxzOkPZ2gq+tsMS9yg==",
+      "dev": true,
+      "requires": {
+        "ajv": "^6.5.0",
+        "babel-code-frame": "^6.26.0",
+        "chalk": "^2.1.0",
+        "cross-spawn": "^6.0.5",
+        "debug": "^3.1.0",
+        "doctrine": "^2.1.0",
+        "eslint-scope": "^4.0.0",
+        "eslint-utils": "^1.3.1",
+        "eslint-visitor-keys": "^1.0.0",
+        "espree": "^4.0.0",
+        "esquery": "^1.0.1",
+        "esutils": "^2.0.2",
+        "file-entry-cache": "^2.0.0",
+        "functional-red-black-tree": "^1.0.1",
+        "glob": "^7.1.2",
+        "globals": "^11.7.0",
+        "ignore": "^4.0.2",
+        "imurmurhash": "^0.1.4",
+        "inquirer": "^5.2.0",
+        "is-resolvable": "^1.1.0",
+        "js-yaml": "^3.11.0",
+        "json-stable-stringify-without-jsonify": "^1.0.1",
+        "levn": "^0.3.0",
+        "lodash": "^4.17.5",
+        "minimatch": "^3.0.4",
+        "mkdirp": "^0.5.1",
+        "natural-compare": "^1.4.0",
+        "optionator": "^0.8.2",
+        "path-is-inside": "^1.0.2",
+        "pluralize": "^7.0.0",
+        "progress": "^2.0.0",
+        "regexpp": "^2.0.0",
+        "require-uncached": "^1.0.3",
+        "semver": "^5.5.0",
+        "strip-ansi": "^4.0.0",
+        "strip-json-comments": "^2.0.1",
+        "table": "^4.0.3",
+        "text-table": "^0.2.0"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
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+        "color-convert": {
+          "version": "1.9.3",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+          "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+          "dev": true,
+          "requires": {
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+          }
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+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+          "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
+          "dev": true
+        },
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+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
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+        "has-flag": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
+          "dev": true
+        },
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^3.0.0"
+          }
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       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.1.0.tgz",
@@ -4204,12 +5594,115 @@
         "supports-color": "^7.0.0"
       }
     },
+    "symbol-observable": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/symbol-observable/-/symbol-observable-1.0.1.tgz",
+      "integrity": "sha1-g0D8RwLDEi310iKI+IKD9RPT/dQ=",
+      "dev": true
+    },
     "symbol-tree": {
       "version": "3.2.4",
       "resolved": "https://registry.npmjs.org/symbol-tree/-/symbol-tree-3.2.4.tgz",
       "integrity": "sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw==",
       "dev": true
     },
+    "table": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/table/-/table-4.0.3.tgz",
+      "integrity": "sha512-S7rnFITmBH1EnyKcvxBh1LjYeQMmnZtCXSEbHcH6S0NoKit24ZuFO/T1vDcLdYsLQkM188PVVhQmzKIuThNkKg==",
+      "dev": true,
+      "requires": {
+        "ajv": "^6.0.1",
+        "ajv-keywords": "^3.0.0",
+        "chalk": "^2.1.0",
+        "lodash": "^4.17.4",
+        "slice-ansi": "1.0.0",
+        "string-width": "^2.1.1"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "color-convert": {
+          "version": "1.9.3",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+          "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+          "dev": true,
+          "requires": {
+            "color-name": "1.1.3"
+          }
+        },
+        "color-name": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+          "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
+          "dev": true
+        },
+        "has-flag": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "string-width": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+          "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+          "dev": true,
+          "requires": {
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^4.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^3.0.0"
+          }
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
+      }
+    },
     "terminal-link": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/terminal-link/-/terminal-link-2.1.1.tgz",
@@ -4231,12 +5724,33 @@
         "minimatch": "^3.0.4"
       }
     },
+    "text-table": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
+      "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=",
+      "dev": true
+    },
     "throat": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/throat/-/throat-5.0.0.tgz",
       "integrity": "sha512-fcwX4mndzpLQKBS1DVYhGAcYaYt7vsHNIvQV+WXMvnow5cgjPphq5CaayLaGsjRdSCKZFNGt7/GYAuXaNOiYCA==",
       "dev": true
     },
+    "through": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
+      "dev": true
+    },
+    "tmp": {
+      "version": "0.0.33",
+      "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",
+      "integrity": "sha512-jRCJlojKnZ3addtTOjdIqoRuPEKBvNXcGYqzO6zWZX8KfKEpnGY5jfggJQ3EjKuu8D4bJRr0y+cYJFmYbImXGw==",
+      "dev": true,
+      "requires": {
+        "os-tmpdir": "~1.0.2"
+      }
+    },
     "tmpl": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/tmpl/-/tmpl-1.0.4.tgz",
@@ -4367,6 +5881,12 @@
         "set-value": "^2.0.1"
       }
     },
+    "uniq": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/uniq/-/uniq-1.0.1.tgz",
+      "integrity": "sha1-sxxa6CVIRKOoKBVBzisEuGWnNP8=",
+      "dev": true
+    },
     "unset-value": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",
@@ -4580,6 +6100,15 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
+    "write": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
+      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
+      "dev": true,
+      "requires": {
+        "mkdirp": "^0.5.1"
+      }
+    },
     "write-file-atomic": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
@@ -4610,6 +6139,12 @@
       "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
       "dev": true
     },
+    "xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
+      "dev": true
+    },
     "y18n": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
diff --git a/package.json b/package.json
index c7d7d6e..07ee352 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   "author": "",
   "license": "ISC",
   "devDependencies": {
-    "jest": "^26.0.1"
+    "jest": "^26.0.1",
+    "standard": "^12.0.1"
   }
 }
diff --git a/type.js b/type.js
new file mode 100644
index 0000000..01b7c38
--- /dev/null
+++ b/type.js
@@ -0,0 +1,13 @@
+const BaseType = require('./types/base.js') // eslint-disable-line
+
+/**
+ * @exports
+ * @typedef SchemaField
+ * @property {BaseType} type
+ * @property {SchemaField} children
+ */
+/**
+ * @exports
+ * @typedef {Object<string, SchemaField|BaseType>} Schema
+ */
+module.exports = {}
diff --git a/types/array.test.js b/types/array.test.js
index 067929e..003a9f7 100644
--- a/types/array.test.js
+++ b/types/array.test.js
@@ -18,7 +18,7 @@ describe('test validate schema type array', () => {
   it('test type array with required', async () => {
     const arr = new TypeArray().required()
 
-    arr.validate([1, 2])
+    throwFunc(arr.validate([1, 2]))
 
     expect(throwFunc(arr.validate(undefined))).toThrow()
   })
@@ -26,7 +26,7 @@ describe('test validate schema type array', () => {
   it('test type array with empty', async () => {
     const arr = new TypeArray().empty()
 
-    arr.validate([])
+    throwFunc(arr.validate([]))
   })
 
   it('test type array without empty', async () => {
@@ -43,7 +43,7 @@ describe('test validate schema type array', () => {
     expect(() => new TypeArray().min(-1)).toThrow()
     expect(() => new TypeArray().max(1).min(2)).toThrow()
 
-    arr.validate([1, 2])
+    throwFunc(arr.validate([1, 2]))
 
     expect(throwFunc(arr.validate([1]))).toThrow()
   })
@@ -55,7 +55,7 @@ describe('test validate schema type array', () => {
     expect(() => new TypeArray().max(false)).toThrow()
     expect(() => new TypeArray().min(5).max(3)).toThrow()
 
-    arr.validate([1])
+    throwFunc(arr.validate([1]))
 
     expect(throwFunc(arr.validate([1, 2, 3]))).toThrow()
   })
diff --git a/types/base.js b/types/base.js
index b8d5333..2fc1203 100644
--- a/types/base.js
+++ b/types/base.js
@@ -1,7 +1,8 @@
 /**
  * type builder interface
  *
- * @interface
+ * @class
+ * @exports
  */
 class BaseType {
   constructor () {
diff --git a/types/boolean.test.js b/types/boolean.test.js
index 68e4c6e..30a1853 100644
--- a/types/boolean.test.js
+++ b/types/boolean.test.js
@@ -11,7 +11,7 @@ describe('test validate schema type boolean', () => {
   it('test type boolean required', async () => {
     const bool = new TypeBoolean().required()
 
-    bool.validate(true)
+    throwFunc(bool.validate(true))
 
     expect(throwFunc(bool.validate(undefined))).toThrow()
     expect(throwFunc(bool.validate({}))).toThrow()
diff --git a/types/number.test.js b/types/number.test.js
index 065e965..b167362 100644
--- a/types/number.test.js
+++ b/types/number.test.js
@@ -11,7 +11,9 @@ describe('test validate schema type number', () => {
   it('test type number with required', async () => {
     const num = new TypeNumber().required()
 
-    num.validate(1)
+    throwFunc(num.validate(1))
+
+    throwFunc(num.validate(1.23))
 
     expect(throwFunc(num.validate(undefined))).toThrow()
     expect(throwFunc(num.validate({}))).toThrow()
@@ -24,7 +26,7 @@ describe('test validate schema type number', () => {
     expect(() => new TypeNumber().min(false)).toThrow()
     expect(() => new TypeNumber().max(1).min(2)).toThrow()
 
-    num.validate(2)
+    throwFunc(num.validate(2))
 
     expect(throwFunc(num.validate(-1))).toThrow()
   })
@@ -36,7 +38,7 @@ describe('test validate schema type number', () => {
     expect(() => new TypeNumber().max(false)).toThrow()
     expect(() => new TypeNumber().min(3).max(2)).toThrow()
 
-    num.validate(2)
+    throwFunc(num.validate(2))
 
     expect(throwFunc(num.validate(3))).toThrow()
   })
diff --git a/types/object.js b/types/object.js
index c538de1..7accd4a 100644
--- a/types/object.js
+++ b/types/object.js
@@ -1,10 +1,20 @@
 const Base = require('./base.js')
 const util = require('util')
+const validate = require('../validate.js')
+
+/**
+ * @typedef {import('../type.js').Schema} Schema
+ */
 
 class TypeObject extends Base {
-  constructor () {
+  /**
+   * @param {Object<string, Schema>} child
+   */
+  constructor (child) {
     super()
+    if (child && typeof child !== 'object') throw new Error('child type wrong')
     this._type = 'object'
+    this._child = child && Object.keys(child).length > 0 ? child : null
   }
 
   validate (value) {
@@ -12,6 +22,13 @@ class TypeObject extends Base {
     if (value === undefined) return null
     /* eslint-disable-next-line */
     if (typeof value !== this._type) return `${util.inspect(value, false, null)} type not ${this._type}`
+    if (this._child !== null) {
+      try {
+        validate(value, this._child)
+      } catch (err) {
+        return err.message
+      }
+    }
     return null
   }
 }
diff --git a/types/object.test.js b/types/object.test.js
index 8d404fd..4e8cce8 100644
--- a/types/object.test.js
+++ b/types/object.test.js
@@ -1,5 +1,6 @@
 /* eslint-disable no-undef */
 const TypeObject = require('./object.js')
+const TypeString = require('./string.js')
 
 describe('test validate type schema object', () => {
   function throwFunc (val) {
@@ -11,9 +12,17 @@ describe('test validate type schema object', () => {
   it('test object type with required', async () => {
     const obj = new TypeObject().required()
 
-    obj.validate({})
+    throwFunc(obj.validate({}))
 
     expect(throwFunc(obj.validate(undefined))).toThrow()
     expect(throwFunc(obj.validate(false))).toThrow()
   })
+
+  it('test object type with child', async () => {
+    const obj = new TypeObject({
+      name: new TypeString()
+    }).required()
+
+    throwFunc(obj.validate({ name: 'asd' }))
+  })
 })
diff --git a/types/string.js b/types/string.js
index 332141d..73ad1cb 100644
--- a/types/string.js
+++ b/types/string.js
@@ -11,6 +11,7 @@ class TypeString extends Base {
     this._max = null
     this._min = null
     this._empty = false
+    this._regexp = null
   }
 
   /**
@@ -43,6 +44,17 @@ class TypeString extends Base {
     return this
   }
 
+  /**
+   * set test pattern with regexp
+   * @param {RegExp} regexp
+   */
+  pattern (regexp) {
+    if (!(regexp instanceof RegExp)) throw new Error('input wrong')
+    if (this._regexp !== null) throw new Error('regexp pattern already exist')
+    this._regexp = regexp
+    return this
+  }
+
   validate (value) {
     if (value === undefined && this._required) return `required`
     if (value === undefined) return null
@@ -52,6 +64,7 @@ class TypeString extends Base {
     const len = value.length
     if (this._min !== null && len < this._min) return `value length < ${this._min}`
     if (this._max !== null && len > this._max) return `value length > ${this._max}`
+    if (this._regexp !== null && !this._regexp.test(value)) return `value pattern not match ${this._regexp.toString()}`
     return null
   }
 }
diff --git a/types/string.test.js b/types/string.test.js
index 155e2e8..9d1aab2 100644
--- a/types/string.test.js
+++ b/types/string.test.js
@@ -10,24 +10,24 @@ describe('test validate type schema string', () => {
 
   it('test string type without required', async () => {
     const str = new TypeString()
-    str.validate(undefined)
+    throwFunc(str.validate(undefined))
   })
 
   it('test string type with required', async () => {
     const str = new TypeString().required()
-    str.validate('123')
+    throwFunc(str.validate('123'))
 
     expect(throwFunc(str.validate(undefined))).toThrow()
   })
 
   it('test string type with empty', async () => {
     const str = new TypeString().empty().required()
-    str.validate('')
+    throwFunc(str.validate(''))
   })
 
   it('test string type without empty', async () => {
     const str = new TypeString().required()
-    str.validate('asd')
+    throwFunc(str.validate('asd'))
 
     expect(throwFunc(str.validate(''))).toThrow()
   })
@@ -39,7 +39,7 @@ describe('test validate type schema string', () => {
     expect(() => new TypeString().min(false)).toThrow()
     expect(() => new TypeString().max(2).min(3)).toThrow()
 
-    str.validate('asd')
+    throwFunc(str.validate('asd'))
 
     expect(throwFunc(str.validate('a'))).toThrow()
   })
@@ -51,8 +51,16 @@ describe('test validate type schema string', () => {
     expect(() => new TypeString().max(false)).toThrow()
     expect(() => new TypeString().min(2).max(1)).toThrow()
 
-    str.validate('a')
+    throwFunc(str.validate('a'))
 
     expect(throwFunc(str.validate('asd'))).toThrow()
   })
+
+  it('test string type with pattern', async () => {
+    const str = new TypeString().required().pattern(/^asd$/)
+
+    expect(throwFunc(str.validate('dsa'))).toThrow()
+
+    throwFunc(str.validate('asd'))
+  })
 })
diff --git a/validate.js b/validate.js
new file mode 100644
index 0000000..973180d
--- /dev/null
+++ b/validate.js
@@ -0,0 +1,27 @@
+const BaseType = require('./types/base.js')
+
+/**
+ * validate
+ * @param {Object} src
+ * @param {import('./type.js').Schema} schema
+ */
+function validate (src, schema) {
+  if (typeof src !== 'object' || typeof schema !== 'object') throw new Error('source or schema not object')
+  for (const it in schema) {
+    if (schema[it] instanceof BaseType) {
+      const result = schema[it].validate(src[it])
+      if (result) throw new Error(`field [${it}]: ${result}`)
+    } else if (typeof schema[it] === 'object' && 'type' in schema[it] && schema[it].type instanceof BaseType) {
+      const result = schema[it].type.validate(src[it])
+      if (result) throw new Error(`field [${it}]: ${result}`)
+    } else {
+      throw new Error('not get any check schema type')
+    }
+
+    if (typeof schema[it] === 'object' && 'children' in schema[it]) {
+      validate(src[it], schema[it].children)
+    }
+  }
+}
+
+module.exports = validate