HTML Reference
Reference pages for HTML — syntax, parameters, return values and runnable examples.
All HTML reference pages
colspan & rowspan
The colspan and rowspan attributes make a single table cell span multiple columns or rows, merging grid positions into one cell so headers and values can stretch across the table.
<input>
The <input> element is the workhorse form control: a single element whose type attribute reshapes it into a text box, email field, password field, checkbox, radio button or number spinner, keyed for submission by its name.
<label>
The <label> element gives a form control a human-readable name and makes that name clickable — associated with a control either by its for attribute or by wrapping the control, which is a real accessibility win, not decoration.
<table>
The <table> element renders a grid of tabular data. It contains structural children — <thead>, <tbody>, rows (<tr>) and cells (<th>/<td>) — that the browser lays out into aligned columns and rows.
This is the HTML reference on XCODX. Each page documents one feature completely — the exact syntax, its parameters and return value, the gotchas that trip people up, and runnable examples you can edit right on the page.
The pages below are grouped so related topics stay together. Pick one to dive in, or run anything you find in the HTML online compiler.