There are two main kinds of selectors in CSS: One is base selector like h1, h2, body, table or any existing HTML tags. For instance, the following rule sets all paragraphs (<p> elements) to red:
CSS also allows us to define our own custom …
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In business circles, we sometimes hear that today is the “age of the customer.” And so it is. Thanks to the enormous advances over the past few years in consumer techno…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions.
Consider email address RFCs:
Look at HTML5 form input element (with type=email) regex pattern: