How vue filters are assigned
Vue.directive("numbers",{
bind (el, binding) {
el.oninput = function (data) {
this.value = this.value.replace(/\D/g, "")
}
}
})
I want to use the input event, but I can"t assign a value to the input box
the requirement is that the input box can only enter numbers
<div v-numbers class="el-input">
<input type="text" v-model="a" >
</div>
this is how I add events to the child elements of the instruction, because I want to add an instruction to the el-input, but I can"t bind it
.
doesn't know what you want, but if it's just to limit the number you can enter, just use < input type= "number" > .
vmurmodel.number = "a" can I use
my approach is to encapsulate this as a custom Input component
to receive the value,type value. After the input triggers the change event, it validates and converts the format of the string, and then re-assigns the value, triggering the v-model update
.
< hr >
ide/04-vue-components/element-ui-input.html" rel=" nofollow noreferrer "> can refer to , and you can transform it according to your project
.
component code
<template>
<el-input :type="type" v-model="currentValue" :maxlength="maxlength" :disabled="disabled" :class="small?'inline-small-input':''" :placeholder="placeholder">
<slot name="prefix" slot="prefix"></slot>
<slot name="suffix" slot="suffix"></slot>
<slot name="prepend" slot="prepend"></slot>
<slot name="append" slot="append"></slot>
</el-input>
</template>
<script>
export default {
props: {
value: {
type: [String, Number]
},
type: {
type: String,
default: 'text'
},
placeholder: {
type: String
},
maxlength: {
type: Number
},
small: {
type: Boolean,
default: false
},
validate: {
type: String,
default: '' // number float
},
fixed: {
type: Number,
default: -1
},
disabled: {
type: Boolean,
default: false
},
min: {
type: Number
},
max: {
type: Number
}
},
data() {
return {
currentValue: null
}
},
watch: {
value: {
handler(val) {
if (val !== this.currentValue) {
this.currentValue = val
}
},
immediate: true
},
currentValue(val, oldVal) {
this.$nextTick(() => {
this.currentValue = this.convert(val)
this.$emit('input', this.currentValue)
})
}
},
methods: {
convert(val) {
switch (this.validate) {
case 'number':
val = parseInt(this.currentValue) || 0
break
case 'z-number':
val = Math.max(parseInt(this.currentValue) || 0, 0)
break
case 'f-number':
val = Math.min(parseInt(this.currentValue) || 0, 0)
break
case 'float':
val = parseFloat(this.currentValue) || 0
val = this.fixed > -1 ? val.toFixed(this.fixed) : val
break
case 'z-float':
val = Math.max(parseFloat(this.currentValue) || 0, 0)
val = this.fixed > -1 ? val.toFixed(this.fixed) : val
break
case 'f-float':
val = Math.min(parseFloat(this.currentValue) || 0, 0)
val = this.fixed > -1 ? val.toFixed(this.fixed) : val
break
default:
break
}
if (this.validate !== '') {
if (typeof this.max === 'number') {
val = Math.min(this.max, val)
}
if (typeof this.min === 'number') {
val = Math.max(val, this.min)
}
}
return val
}
}
}
</script>
use
<v-form-input v-model="inputValue" validate="z-number" :min="1" :max="1"/>
