JavaScript & jQuery

Chapter 13: Form Enhancement & Validation

Reacting to the submit event submit-event.html submit-event.js
Changing the type of a form input input-type.html input-type.js
Disable the submit button disable-submit.html disable-submit.js
Select all checkboxes all-checkboxes.html all-checkboxes.js
When a radio is selected show an extra option show-option.html show-option.js
Populate a selectbox populate-selectbox.html populate-selectbox.js
Character counter for textarea textarea-counter.html textarea-counter.js
Placeholder text placeholder-polyfill.html placeholder-polyfill.js
Number polyfill number-polyfill.html number-polyfill-eg.js
Example validation.html validation.js