HTML

email regex html pattern

<input name="email" type="email" pattern="[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+.[A-Za-z]{1,63}$" class="form-control" placeholder="Email*" id="email" required="">

pattern for email id in html

<form action="example.php">
  <label for="email">Email:</label>
  <input type="email" id="email" name="email"
  pattern="[a-z0-9._%+-]+@[a-z0-9.-]+.[a-z]{2,}$"
  title="Please Enter Valid Email Id">
  <input type="submit">
</form>

html email regex

var email = /^[a-z0-9._%+-]+@[a-z0-9.-]+.[a-z]{2,4}$/;