index.js
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import { VantComponent } from '../common/component';
VantComponent({
field: true,
classes: [
'input-class',
'plus-class',
'minus-class'
],
props: {
value: null,
integer: Boolean,
disabled: Boolean,
inputWidth: String,
asyncChange: Boolean,
disableInput: Boolean,
min: {
type: null,
value: 1
},
max: {
type: null,
value: Number.MAX_SAFE_INTEGER
},
step: {
type: null,
value: 1
}
},
computed: {
minusDisabled() {
return this.data.disabled || this.data.value <= this.data.min;
},
plusDisabled() {
return this.data.disabled || this.data.value >= this.data.max;
}
},
watch: {
value(value) {
if (value === '') {
return;
}
const newValue = this.range(value);
if (typeof newValue === 'number' && value !== newValue) {
this.set({ value: newValue });
}
}
},
data: {
focus: false
},
created() {
this.set({
value: this.range(this.data.value)
});
},
methods: {
onFocus(event) {
this.$emit('focus', event.detail);
},
onBlur(event) {
const value = this.range(this.data.value);
this.triggerInput(value);
this.$emit('blur', event.detail);
},
// limit value range
range(value) {
return Math.max(Math.min(this.data.max, value), this.data.min);
},
onInput(event) {
const { value = '' } = event.detail || {};
this.triggerInput(value);
},
onChange(type) {
if (this.data[`${type}Disabled`]) {
this.$emit('overlimit', type);
return;
}
const diff = type === 'minus' ? -this.data.step : +this.data.step;
const value = Math.round((this.data.value + diff) * 100) / 100;
this.triggerInput(this.range(value));
this.$emit(type);
},
onMinus() {
this.onChange('minus');
},
onPlus() {
this.onChange('plus');
},
triggerInput(value) {
this.set({
value: this.data.asyncChange ? this.data.value : value
});
this.$emit('change', value);
}
}
});