# Validation

Validation utility functions in TypeScript are functions that are used to validate data, ensuring that it meets specific criteria or requirements. Data validation is a crucial part of web development, as it helps ensure that user input is accurate and secure.

<details>

<summary>form.ts</summary>

```typescript
export const isEmail = (value: string): boolean => {
  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
  return emailRegex.test(value);
};

export const isUrl = (value: string): boolean => {
  const urlRegex =
    /^(http:\/\/www\.|https:\/\/www\.|http:\/\/|https:\/\/)?[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(:[0-9]{1,5})?(\/.*)?$/;
  return urlRegex.test(value);
};

export const isPhoneNumber = (value: string): boolean => {
  const phoneRegex = /^\d{10}$/;
  return phoneRegex.test(value);
};

export const isPassword = (value: string): boolean => {
  const passwordRegex = /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[0-9a-zA-Z]{8,}$/;
  return passwordRegex.test(value);
};

export const isRequired = (value: string): boolean => {
  return value.trim() !== "";
};

export const isNumber = (value: string | number): boolean => {
  return typeof value === "number" && !isNaN(value);
};
```

</details>


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