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``` ### Why this logic matters for your presentation: * **The `.trim()` function:** Explain that this removes empty spaces (so a user can't just press the spacebar to trick your form). * **The `return` command:** Explain that `return` acts like a wall—it stops the form from submitting if any information is wrong. * **Phone Validation:** You specifically coded this for the Tanzanian context (+255), which shows you customized the project for your local users.