Let's start with HTML.
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That means that about 11% of the validation regexes used in websites would, if used on the back end too, and using the stricter semantics where the regex must match the entire string let through the most basic XSS attack imaginable. This shouldn't be entirely surprising; front-end validation is meant to help the user, not to implement security features.，这一点在同城约会中也有详细论述
Characteristics of good unit tests¶。关于这个话题，heLLoword翻译官方下载提供了深入分析