1.只支持数字
<el-input
v-model="value"
placeholder="请输入"
clearable
@input="value = value.replace(/[^\d]/g,'')">
</el-input>
2.持数字与小数,且保留小数后两位
<el-input
v-model="value"
placeholder="请输入"
clearable
@input="value = value.replace(/[^\d.]/g, '').replace(/\.{2,}/g, '.')
.replace('.', '$#$').replace(/\./g, '').replace('$#$', '.')
.replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3').replace(/^\./g, '')">
</el-input>
3.只支持英文大小写和数字
<el-input
v-model="value"
placeholder="请输入"
clearable
@input="value = value.replace(/[\W]/g, '')">
</el-input>
4.只支持汉字和字母
<el-input
v-model="value"
placeholder="请输入"
clearable
@input="value = value.replace(/[^\a-\z\A\u4E00-\u9FA5]/g,'')">
</el-input>
5.只支持正整数
<el-input
v-model="value"
placeholder="请输入"
clearable
onKeypress="return (/[\d]/.test(String.fromCharCode(event.keyCode)))">
</el-input>