el-input限制输入小数，且小数位数最多两位

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<el-input size="mini" v-model="searchData.weight" type="number" @input="validateNumber"  class="search_val"> </el-input>   validateNumber (value) {     const reg = /^\d+(\.\d{1,2})?$/     if (!reg.test(value)) {       this.searchData.weight = value.substring(0, value.length - 1)     } },