<input type="number" placeholder="请输入" v-number-only v-model="SaleQty" v-on:click.stop.prevent>

directives: {
        // v-number-only
        numberOnly: {
            bind: function(el) {
                el.handler = function() {
                    el.value = el.value.replace(/\D+/, ‘‘)
                }
                el.addEventListener(‘input‘, el.handler)
            },
            unbind: function(el) {
                el.removeEventListener(‘input‘, el.handler)
            }
        }
    },