TypeScript for Beginners - More Programs – 1

This tutorial guides you through creating a simple email validator using TypeScript. It covers defining an email string, using basic logic to check for the presence of '@' and '.' characters, and implementing the indexOf method to find character positions. The tutorial also includes conditional checks to determine email validity and outputs results to the console. Finally, it demonstrates testing the validator and suggests possible enhancements for more sophisticated validation.

What is the initial step in creating an e-mail validator program in TypeScript?

• Define a variable of type number

• Create a new HTML file

• Define an e-mail variable of type string

• Use regular expressions for validation

Which method is used to find the position of a character in a string in TypeScript?

• slice

• charAt

• indexOf

• substring

What does the indexOf method return if a character is not found in a string?

• null

• -1

• 1

• 0

What should you do after modifying the TypeScript code to test changes in the browser?

• Clear the browser cache

• Refresh the browser without compiling

• Compile the code and refresh the browser

• Restart the computer

What future topic will make e-mail validation simpler and more robust?

• JavaScript frameworks

• Advanced TypeScript features

• Regular expressions

• HTML5 validation