HTML5 Form Validations with Pattern Matching

HTML5 Form validation is another type of client side validation . In HTML5 validation no javascript or jquery needed. Using HTML5 we can validate form with pattern.

Different type of Pattern Matching in HTML5

1. Letter only
2. Number only
3. Email
4. Password
5. Phone no
6. Alphanumeric
7. URL

Letters Only
pattern=”[A-Za-z]+” accepts only capital or small letters.

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<form> <input type="text" pattern="[A-Za-z]+" title="letters only" required /> <input type="submit" /> </form>

Number only
pattern=”[0-9]+” accepts only numbers 0, 1, 2….

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<form> <input type="text" pattern="[0-9]+" title="only letters" required /> <input type="submit" /> </form>

Email
pattern=”[a-z0-9._%+-]+@[a-z0-9.-]+.[a-z]{2,4}$” accepts valid email address

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<form> <input type="email" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+.[a-z]{2,4}$" title="xyz@something.com" required /> <input type="submit" /> </form>

Password
pattern=”(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,}” accept at least one number and one uppercase and lowercase letter, and at least 6 or more characters

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<form> <input type="password" name="pass" pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,}" title="at least one number and one uppercase and lowercase letter, and at least 6 or more characters" required /> <input type="submit" /> </form>

Phone no
pattern=”^d{10}$” accepts only numeric values with 10 digit.

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<form> <input type="tel" pattern="^d{10}$" title="10 numeric characters only" required /> <input type="submit" /> </form>

Alphanumeric
pattern=”^[a-zA-Z][a-zA-Z0-9-_.]{5,12}$” accepts alphanumeric values letters and digits.

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<form> <input type="text" pattern="^[a-zA-Z][a-zA-Z0-9-_.]{5,12}$" title="alphanumeric 6 to 12 chars" /> <input type="submit" /> </form>

URL
pattern=”https?://.+” required title=”http://phpgurukul.com” accepts valid web url starting with http://.

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<form> <input type="url" name="website" pattern="https?://.+" required title="http://phpgurukul.com" /> <input type="submit" /> </form>