HTML Notes - Page 7

GET or POST: What Happens When a Form Is Submitted

Two methods, two very different places for your data. Learn which to use, what is safe in a URL, and why neither is encrypted on its own.

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Built In Form Validation

The browser can check most of a form before it is sent, with no JavaScript. Learn the attributes, the CSS hooks, and why none of it replaces server va...

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Buttons: submit, reset and button

Three button types, one attribute, and a default that causes more accidental submissions than any other rule in HTML.

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textarea, File Uploads and Hidden Fields

Three controls with their own rules: a textarea whose value is its content, a file input that needs the right enctype, and hidden fields that are not...

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select, option, optgroup and datalist

Dropdowns done properly: grouping options, multiple selection, the placeholder option trick, and when a datalist beats a select.

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Checkboxes, Radio Buttons and Grouping

Checkboxes for many answers, radios for one. The name attribute is what groups radios, and fieldset with legend is what makes either group make sense.

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Labels: The Most Important Element in a Form

A label names a field for every reader and grows its click target. Two ways to bind one, and the reasons a form without labels is not usable.

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Input Types: Text, Email, Number, Date and the Rest

One element, more than twenty types. Choosing the right one gives you the correct mobile keyboard, free validation and better autofill, at no cost.

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Form Structure: form, action and method

Every form is a container, a set of named controls and a submit button. Learn what action and method do, why name matters more than id, and what the b...

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