It's perfectly valid to add input filtering on top of type=email if you want to further restrict the input set. Maybe you hate people with gmail addresses or only want to allow email addresses at your local firm (both examples from before!). In that case, having a more restrictive pattern makes sense.
* @param right 右边界（不包含），详情可参考体育直播
The Dutch love four-day working weeks, but are they sustainable?。业内人士推荐同城约会作为进阶阅读
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