ruler

一个灵活、可链式调用的 TypeScript/JavaScript 校验规则工厂。

特性

• 链式 API，可构建复杂校验规则
• 支持 string、number、array、boolean、object、symbol、bigint、null、undefined
• 可自定义错误信息
• 易于扩展与集成
• 支持 TypeScript

与 UI 框架集成

Varlet UI

<script setup lang="ts">
import { ref } from 'vue'
import { rulerFactory } from 'rattail/ruler'

const r = rulerFactory((validator) => {
  return (value) => {
    const e = validator(value)
    return e ? e.message : true
  }
})

const model = ref({
  name: '',
  email: '',
})
</script>

<template>
  <var-form>
    <var-input
      v-model="model.name"
      placeholder="姓名"
      :rules="r().required('必填').min(2, '长度不正确').done()"
    />
    <var-input
      v-model="model.age"
      placeholder="邮箱"
      :rules="r().email('必须是邮箱格式').done()"
    />
  </var-form>
</template>

Vant

<script setup lang="ts">
import { ref } from 'vue'
import { rulerFactory } from 'rattail/ruler'
import type { FieldRule } from 'vant'

const r = rulerFactory<FieldRule>((validator, params) => ({
  validator(value) {
    const e = validator(value)

    return e ? e.message : true
  },
  trigger: ['onChange', 'onBlur', 'onSubmit'],
  ...params,
}))

const model = ref({
  name: '',
  email: '',
})
</script>

<template>
  <van-form>
    <van-cell-group inset>
      <van-field
        v-model="model.name"
        label="姓名"
        placeholder="姓名"
        :rules="r().required('必填').done()"
      />
      <van-field
        v-model="model.email"
        label="邮箱"
        placeholder="邮箱"
        :rules="r().email('必须是邮箱格式').done()"
      />
    </van-cell-group>
  </van-form>
</template>

Naive UI

<script setup lang="ts">
import { ref } from 'vue'
import type { FormItemRule } from 'naive-ui'
import { rulerFactory } from 'rattail/ruler'

const r = rulerFactory<FormItemRule>((validator, params = {}) => ({
  trigger: ['blur', 'change', 'input'],
  validator: (_, value) => validator(value),
  ...params,
}))

const model = ref({
  name: '',
  age: 20,
})
</script>

<template>
  <n-form :model>
    <n-form-item
      path="name"
      label="姓名"
      :rule="r().required('必填').min(2, '长度不正确').done()"
    >
      <n-input v-model:value="model.name" />
    </n-form-item>
    <n-form-item
      path="age"
      label="年龄"
      :rule="r().number().required('必填').negative('必须为负数').done()"
    >
      <n-input-number v-model:value="model.age" />
    </n-form-item>
  </n-form>
</template>

Element Plus

<script setup lang="ts">
import { ref } from 'vue'
import type { FormItemRule } from 'element-plus'
import { rulerFactory } from 'rattail/ruler'

const r = rulerFactory<FormItemRule>((validator, params) => ({
  validator(_, value, callback) {
    const e = validator(value)

    e ? callback(e) : callback()
  },
  trigger: ['blur', 'change', 'input'],
  ...params,
}))

const model = ref({
  name: '',
  email: '',
})
</script>

<template>
  <el-form :model>
    <el-form-item
      prop="name"
      label="姓名"
      :rules="r().required('必填').done()"
    >
      <el-input v-model="model.name" />
    </el-form-item>
    <el-form-item
      prop="email"
      label="邮箱"
      :rules="r().email('必须是邮箱格式').done()"
    >
      <el-input v-model="model.email" />
    </el-form-item>
  </el-form>
</template>

扩展 API

以 Naive UI 为例

import { FormItemRule } from 'naive-ui'
import {
  RulerContext,
  rulerFactory,
  RulerFactoryMessage,
} from 'rattail/ruler'

interface RulerExtendedContext {
  ip(
    message: RulerFactoryMessage,
    params?: FormItemRule,
  ): RulerContext<FormItemRule, FormItemRule, this>
}

const r = rulerFactory<
  FormItemRule,
  FormItemRule,
  RulerExtendedContext
>(
  (validator, params = {}) => ({
    trigger: ['blur', 'change', 'input'],
    validator: (_, value) => validator(value),
    ...params,
  }),
  (ctx) => {
    function ip(message: RulerFactoryMessage, params?: FormItemRule) {
      ctx.addRule((value) => {
        // 自行实现 isString 和 isIP
        if (!isString(value) || !isIP(value)) {
          return new Error(ctx.getMessage(message))
        }
      }, params)

      return ctx
    }

    return { ip }
  },
)

r().ip('IP 格式错误').done()

API

类型校验

• .string(message?, params?)
• .number(message?, params?)
• .array(message?, params?)
• .boolean(message?, params?)
• .object(message?, params?)
• .symbol(message?, params?)
• .bigint(message?, params?)
• .null(message?, params?)
• .undefined(message?, params?)
• .true(message?, params?)
• .false(message?, params?)

非空校验

• .required(message)

字符串校验

• .min(value, message, params?)
• .max(value, message, params?)
• .length(value, message, params?)
• .regex(regexp, message, params?)
• .startsWith(value, message, params?)
• .endsWith(value, message, params?)
• .includes(value, message, params?)
• .uppercase(message, params?)
• .lowercase(message, params?)
• .email(message, params?)

数字校验

• .number().min(value, message, params?)
• .number().max(value, message, params?)
• .number().gt(value, message, params?)
• .number().gte(value, message, params?) 别名 .min
• .number().lt(value, message, params?)
• .number().lte(value, message, params?) 别名 .max
• .number().positive(value, message, params?)
• .number().negative(value, message, params?)

Bigint 校验

• .bigint().min(value, message, params?)
• .bigint().max(value, message, params?)
• .bigint().gt(value, message, params?)
• .bigint().gte(value, message, params?) 别名 .min
• .bigint().lt(value, message, params?)
• .bigint().lte(value, message, params?) 别名 .max
• .bigint().positive(value, message, params?)
• .bigint().negative(value, message, params?)

数组校验

• .array().min(value, message, params?)
• .array().max(value, message, params?)
• .array().length(value, message, params?)
• .array().includes(value, message, params?)

谓词校验

• .is(fn, message, params?)
• .not(fn, message, params?)

完成规则构建

• .done()

自定义规则

• .addRule(validator)

值转换

• .trim()
• .toLowerCase()
• .toUpperCase()
• .transform(fn)