el-input 只能输入数字和一个小数点，或者只能输入正整数

 只能输入框只能输入正整数，输入同时禁止了以0开始的数字输入，防止被转化为其他进制的数值。

下面为案例： 

<!-- 不能输入零时-->
<input type='text' oninput="value=value.replace(/^(0+)|[^\d]+/g,'')">

<!-- 能输入零时-->
<input type='text' oninput="value=value.replace(/^0+(\d)|[^\d]+/g,'')">

    <div class="jz_Dialog">
        <div>
          <div class="saveItem saveTop">
            <div class="saveName">结转数量</div>
            <el-input v-model="editData.postNum"
                      class="saveInput"
                      oninput="value=value.replace(/^(0+)|[^\d]+/g,'')"
                      @blur="editData.postNum = $event.target.value"
                      size="mini"></el-input>
          </div>
          <div class="saveItem saveTop">
            <div class="saveName">结转单价</div>
            <el-input v-model="editData.postUnitPrice"
                      class="saveInput"
                      @input="getNumIpt(editData.postUnitPrice,'1')"
                      size="mini"></el-input>
             <div class="saveItem saveTop">
            <div class="saveName">结转金额</div>
            <el-input v-model="editData.postPrice"
                      class="saveInput"
                      @input="getNumIpt(editData.postPrice,'2')"
                      size="mini"></el-input>
          </div>        
          </div>
        </div>
      </div>

    getNumIpt (val, type) {
      // 非数字 一位小数点 开头不能是小数
      if (type == 1) {
        this.editData.postUnitPrice = val
          .replace(/[^\d.]/g, "")
          .replace(/^(\d+)\.(\d*).*$/, "$1.$2")
          .replace(/^\.*$/g, "");

      }
      if (type == 2) {
        this.editData.postPrice = val
          .replace(/[^\d.]/g, "")
          .replace(/^(\d+)\.(\d*).*$/, "$1.$2")
          .replace(/^\.*$/g, "");

      }

    },