element input输入框只能输入数字
html
<el-input v-model="value" onkeypress="return( /[\d]/.test(String.fromCharCode(event.keyCode)))"></el-input>
限制不能输入中文
html
<el-input @input="formData.stationCode = formData.stationCode.replace(/[\u4E00-\u9FA5]/g, '')" ></el-input>