elementUI el-input 只能输入正整数验证的操作方法

onKeypress="return (/[\d]/.test(String.fromCharCode(event.keyCode || event.which))) || event.which === 8"

<el-input type="number" placeholder="请输入" min="1" onKeypress="return (/[\d]/.test(String.fromCharCode(event.keyCode || event.which))) || event.which === 8" v-model.number="count"></el-input>

<el-input type="number" placeholder="请输入" min="1" oninput ="value=value.replace(/[^\d]/g,'')"  v-model.number="count"></el-input>

oninput ="value=value.replace(/[^0-9.]/g,'')"

// 保留一位小数
oninput="if(isNaN(value)) { value = parseFloat(value) } if(value.indexOf('.')>0){value=value.slice(0,value.indexOf('.')+2)}" 
 
// 若需要保留N位小数，则把2 改为 1 + n即可

<el-input min="0" max="100" type="number" @input="numberChange($event, 100)" @change="numberChange($event, 100)" onKeypress="return (/[\d]/.test(String.fromCharCode(event.keyCode || event.which))) || event.which === 8" v-model.number="count"></el-input> 

numberChange (val, max) {
      this.$nextTick(() => {
        this.count = Math.min(parseInt(val), max)
      })
    }

<el-form-item label="安全库存:" prop="safeQty" class="meter_one" style="margin-top: 10px">
          <el-input
            v-model="form.safeQty"
            type="number"
            min="0"
            @input="form.safeQty=form.safeQty.replace(/^(0+)|[^\d]+/g,'')"
            placeholder="请输入安全库存"/>
        </el-form-item>

 <el-form-item label="净重KG:" prop="netWeight" class="meter_one" style="margin-top: 10px">
          <el-input
            v-model="form.netWeight"
            type="number"
            placeholder="请输入净重KG"
            oninput="if(isNaN(value)) { value = null } if(value.indexOf('.')>0){value=value.slice(0,value.indexOf('.')+5)}"
          />
        </el-form-item>