vue3.x mitt使用方法

第三方库 mitt

ValidateForm.vue

<template>
    <form class="validata-input-container" >
        <slot></slot>
        <div class="submit-area" >
            <slot name="submit">
                <button @click.prevent="submitForm" type="submit" class="btn btn-primary me-md-2">提交</button>
                <button @click.prevent="clearInput" type="submit" class="btn btn-primary">重置</button>
            </slot>
        </div>
    </form>
</template>

<script lang="ts">
import { defineComponent, onUnmounted } from 'vue'
import mitt from 'mitt'
// 监听器
type validateFun = () => boolean
export const emitter = mitt()
export default defineComponent({
    emits: ['form-submit'],
    setup (props, context) {
        let funArr: validateFun[] = []
        const submitForm = () => {
            const result = funArr.map(func => func()).every(result => result)
            console.log(result)
            context.emit('form-submit', result)
        }
        const callback = (func?: validateFun) => {
            if (func) {
                funArr.push(func)
            }
        }
        const clearInput = () => {
            emitter.emit('form-clear-input')
        }
        // 绑定事件
        emitter.on('form-item-created', callback)
        onUnmounted(() => {
            emitter.off('form-item-created', callback)
            funArr = []
        })
        return {
            submitForm,
            clearInput
        }
    }
})
</script>

　　

ValidateInput.vue

<template>
    <div class="validata-input-container pb-3">
        <input
            v-if="tag !== 'textarea'"
            :class="{'is-invalid': inputRef.error}"
            v-bind="$attrs"
            :value="inputRef.val"
            @input="upDateValue"
            @blur="vaildateEmail"
            class="form-control" aria-describedby="emailHelp">
        <textarea
            v-else
            :class="{'is-invalid': inputRef.error}"
            v-bind="$attrs"
            :value="inputRef.val"
            @input="upDateValue"
            @blur="vaildateEmail"
            class="form-control">
        </textarea>
        <span v-if="inputRef.error" class="invalid-feedback">{{inputRef.message}}</span>
    </div>
</template>
<script lang="ts">
import { defineComponent, PropType, reactive, onMounted, onUnmounted } from 'vue'
import mitt from 'mitt'
import { emitter } from './ValidateForm.vue'
const emailReg = /^[a-zA-Z0-9_.-]+@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*\.[a-zA-Z0-9]{2,6}$/
const passwordReg = /^[a-zA-Z0-9]{6,}$/
interface RuleProp {
    type: 'required' | 'email' | 'password' | 'textarea' | 'custom',
    message: string,
    validator?: () => boolean
}
export const emitterClear = mitt()
export type TagType = 'input' | 'textarea'
// 创建一个数组类型的类型
export type RulesProp = RuleProp[]
export default defineComponent({
    props: {
        rules: Array as PropType<RulesProp>,
        modelValue: String,
        tag: {
            type: String as PropType<TagType>,
            default: 'input'
        }
    },
    inheritAtter: false,
    setup (props, context) {
        const inputRef = reactive({
            val: props.modelValue || '',
            error: false,
            message: ''
        })
        const upDateValue = (e: KeyboardEvent) => {
            const targeValue = (e.target as HTMLInputElement).value
            inputRef.val = targeValue
            context.emit('update:modelValue', targeValue)
        }
        const vaildateEmail = () => {
            if (props.rules) {
                const allPass = props.rules.every(rule => {
                    let passed = true
                    inputRef.message = rule.message
                    switch (rule.type) {
                    case 'required':
                        passed = (inputRef.val.trim() !== '')
                        break
                    case 'email':
                        passed = emailReg.test(inputRef.val)
                        break
                    case 'password':
                        passed = passwordReg.test(inputRef.val)
                        break
                    case 'custom':
                        passed = rule.validator ? rule.validator() : true
                        break
                    default:
                        break
                    }
                    return passed
                })
                inputRef.error = !allPass
                return allPass
            }
            return true
        }
        onMounted(() => {
            emitter.emit('form-item-created', vaildateEmail)
        })
        const clearInputS = () => {
            console.log(inputRef.val)
            inputRef.val = ''
        }
        emitter.on('form-clear-input', clearInputS)
        onUnmounted(() => {
            emitter.off('form-clear-input', clearInputS)
        })
        return {
            inputRef,
            vaildateEmail,
            upDateValue
        }
    }
})
</script>