CodePrimer — Uptoolify

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23 snippets

HTML headings h1–h6

How do I create page headings?

Basics html basics

Paragraphs and line breaks

How do I break text into paragraphs?

Basics html basics

Hyperlinks with href

How do I make a clickable link?

Basics html basics navigation

Ordered and unordered lists

How do I make bullet or numbered lists?

Basics html basics

HTML table structure

How do I display tabular data?

Basics html basics tables

Image with alt text

How do I insert an image accessibly?

Media html media a11y

Charset and viewport meta

Why does mobile layout look wrong?

Basics html basics responsive

Link an external CSS file

How do I attach a stylesheet?

Basics html basics css

Include JS with defer

How do I add JavaScript to a page?

Basics html basics javascript

div vs span

When do I use div or span?

Basics html basics

Radio button group

How do I let users pick only one option?

Forms html forms

Checkboxes as PHP arrays

How do I submit multiple checkboxes to PHP?

Forms html forms php

Select dropdown

How do I make a dropdown menu?

Forms html forms

Textarea multi-line input

How do I collect long comments?

Forms html forms

Date, hidden, and file inputs

What special input types should I know?

Forms html forms files

GET vs POST forms

When should a form use GET or POST?

Forms html forms http

Custom data-* attributes

How do I store extra data on an element?

Basics html javascript dom

Audio and video embeds

How do I embed media without Flash?

Media html media