input 输入框效验

input 输入框效验

1：只能输入正整数：

         <el-input  v-model.number="formData.projectNum"  type='number' min="1" size="small" placeholder="输入数量"
                             onkeyup="if(this.value.length==1){this.value=this.value.replace(/[^1-9]/g,'')}
                            else{this.value=this.value.replace(/\D/g,'')}"
                             onafterpaste="if(this.value.length==1){this.value=this.value.replace(/[^1-9]/g,'')}
                            else{this.value=this.value.replace(/\D/g,'')}"/>