asp.net core docker Angular regular expression validation

In this video we will discuss using pattern validator in angular.

With the pattern validator we use a regular expression. Regular expressions are extremely useful when you want to validate if a given string conforms to a specified pattern.

For example, you can use regular expressions to check if a given email conforms to a a valid email format. Similarly you can also check if provided postcode conforms to a specific country postcode format.

Apart from checking conformity with a pattern, they can also be used to extract sub-strings from a given input string.

To validate if the provided email has a valid email pattern we can use the pattern validator in angular. To use the pattern validator use the pattern attribute along with the regular expression on the input field you want to validate.

It is easy to learn regular expressions. Initially they may appear complicated, but if you get the basics right it is very easy to understand them. However, you can also find the commonly used regular expressions on the internet. For example, if you want to find a regular expression to validate email address, simply search the internet with the following string
Regular expression for email validation

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asp.net core docker Angular regular expression validation
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