input特殊输入框

     <span class="demonstration">姓名</span>
     <el-input v-model="value3" placeholder="只能输入中文"  align="right"  style='width:100px'  onInput="this.value=this.value.replace(/[^\u4e00-\u9fa5]/g,'')"></el-input>

     <span class="demonstration">价格</span>
     <el-input v-model="value4" placeholder="只能输入数字带小数点的"  align="right"  style='width:100px'  onInput="if(isNaN(value))execCommand('undo')"  onafterpaste="if(isNaN(value))execCommand('undo')"></el-input>

     <span class="demonstration">年龄</span>
     <el-input v-model="value5" placeholder="只能输入纯数字"  align="right"  style='width:100px' onInput="value = value.replace(/[^\d]/g,'')"></el-input>
     
     <span class="demonstration">密码</span>
     <el-input v-model="value6" placeholder="只输入数字和字母"  align="right"  style='width:150px'   maxlength="12" onInput="value=value.replace(/[\W]/g,'')"></el-input>