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html | Accessibility Support

HTML stands for Hyper Text Markup Language. It is the foundation for almost every website on the internet.

Features and Tests

Features represent the various aspects of a technology. In HTML a feature might be an element or attribute. In CSS a feature might be a property. In ARIA a feature might be an attribute.

A test is a manual verification that a feature works like it is supposed to. The expectations of a feature might change in different contexts or when combined with different features and technologies. Therefore each feature can have many tests, and a test can be shared between many features and technologies. In general, a test should be specifically tailored to measure a single outcome.

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FeatureHas SupportFailing tests
a(href)_element
a_element
button_element
canvas_element
datalist_element
dd_element
details_element
dialog_element
disabled_attribute
div_element
dl_element
dt_element
fieldset_element
figcaption_element
figure_element
h1-6_elements
headers_attribute
img_element
inert_attribute
input(type-button)_element
input(type-checkbox)_element
input(type-color)_element
input(type-date)_element
input(type-datetime-local)_element
input(type-email)_element
input(type-file)_element
input(type-hidden)_element
input(type-image)_element
input(type-month)_element
input(type-number)_element
input(type-password)_element
input(type-radio)_element
input(type-range)_element
input(type-reset)_element
input(type-search)_element
input(type-submit)_element
input(type-tel)_element
input(type-text)_element
input(type-time)_element
input(type-url)_element
input(type-week)_element
label_element
lang_attribute
legend_element
li_element
list_attribute
max_attribute
maxlength_attribute
min_attribute
ol_element
optgroup_element
option_element
p_element
required_attribute
role_attribute
scope_attribute
section_element
select_element
span_element
summary_element
svg_element
table_element
td_element
textarea_element
th_element
title_attribute
ul_element