CSS 属性默认值

HTML 元素的 CSS 属性默认值

下表显示了所有 HTML 元素的默认 CSS 属性浏览器默认值。

元素默认的 CSS 值
a:linkcolor: (internal value);text-decoration: underline;cursor: auto;
a:visitedcolor: (internal value);text-decoration: underline;cursor: auto;
a:link:activecolor: (internal value);
a:visited:activecolor: (internal value);
abbrNone.
addressdisplay: block;font-style: italic;
areadisplay: none;
articledisplay: block;
asidedisplay: block;
audioNone.
bfont-weight: bold;
baseNone.
bdiNone.
bdounicode-bidi: bidi-override;
blockquotedisplay: block;margin-top: 1em;margin-bottom: 1em;margin-left: 40px;margin-right: 40px;
bodydisplay: block;margin: 8px;
body:focusoutline: none;
brNone.
buttonNone
canvasNone.
captiondisplay: table-captiontext-align: center;
citefont-style: italic;
codefont-family: monospace;
coldisplay: table-column;
colgroupdisplay: table-column-group
datalistdisplay: none;
dddisplay: block;margin-left: 40px;
deltext-decoration: line-through;
detailsdisplay: block;
dfnfont-style: italic;
dialogNone.
divdisplay: block;
dldisplay: block;margin-top: 1em;margin-bottom: 1em;margin-left: 0;margin-right: 0;
dtdisplay: block;
emfont-style: italic;
embed:focusoutline: none;
fieldsetdisplay: block;margin-left: 2px;margin-right: 2px;padding-top: 0.35em;padding-bottom: 0.625em;padding-left: 0.75em;padding-right: 0.75em;border: 2px groove (internal value);
figcaptiondisplay: block;
figuredisplay: block;margin-top: 1em;margin-bottom: 1em;margin-left: 40px;margin-right: 40px;
footerdisplay: block;
formdisplay: block;margin-top: 0em;
h1display: block;font-size: 2em;margin-top: 0.67em;margin-bottom: 0.67em;margin-left: 0;margin-right: 0;font-weight: bold;
h2display: block;font-size: 1.5em;margin-top: 0.83em;margin-bottom: 0.83em;margin-left: 0;margin-right: 0;font-weight: bold;
h3display: block;font-size: 1.17em;margin-top: 1em;margin-bottom: 1em;margin-left: 0;margin-right: 0;font-weight: bold;
h4display: block;margin-top: 1.33em;margin-bottom: 1.33em;margin-left: 0;margin-right: 0;font-weight: bold;
h5display: block;font-size: .83em;margin-top: 1.67em;margin-bottom: 1.67em;margin-left: 0;margin-right: 0;font-weight: bold;
h6display: block;font-size: .67em;margin-top: 2.33em;margin-bottom: 2.33em;margin-left: 0;margin-right: 0;font-weight: bold;
headdisplay: none;
headerdisplay: block;
hrdisplay: block;margin-top: 0.5em;margin-bottom: 0.5em;margin-left: auto;margin-right: auto;border-style: inset;border-width: 1px;
htmldisplay: block;html:focusoutline: none;
ifont-style: italic;
iframe:focusoutline: none;
iframe[seamless]display: block;
imgdisplay: inline-block;
inputNone.
instext-decoration: underline;
kbdfont-family: monospace;
labelcursor: default;
legenddisplay: block;padding-left: 2px;padding-right: 2px;border: none;
lidisplay: list-item;
linkdisplay: none;
mainNone.
mapdisplay: inline;
markbackground-color: yellow;color: black;
menudisplay: block;list-style-type: disc;margin-top: 1em;margin-bottom: 1em;margin-left: 0;margin-right: 0;padding-left: 40px;
menuitemNone.
metaNone.
meterNone.
navdisplay: block;
noscriptNone.
object:focusoutline: none;
oldisplay: block;list-style-type: decimal;margin-top: 1em;margin-bottom: 1em;margin-left: 0;margin-right: 0;padding-left: 40px;
optgroupNone.
optionNone.
outputdisplay: inline;
pdisplay: block;margin-top: 1em;margin-bottom: 1em;margin-left: 0;margin-right: 0;
paramdisplay: none;
pictureNone.
predisplay: block;font-family: monospace;white-space: pre;margin: 1em 0;
progressNone.
qdisplay: inline;
q::beforecontent: open-quote;
q::aftercontent: close-quote;
rpNone.
rtline-height: normal;
rubyNone.
stext-decoration: line-through;
sampfont-family: monospace;
scriptdisplay: none;
sectiondisplay: block;
selectNone.
smallfont-size: smaller;
sourceNone.
spanNone.
striketext-decoration: line-through;
strongfont-weight: bold;
styledisplay: none;
subvertical-align: sub;font-size: smaller;
summarydisplay: block;
supvertical-align: super;font-size: smaller;
tabledisplay: table;border-collapse: separate;border-spacing: 2px;border-color: gray;
tbodydisplay: table-row-group;vertical-align: middle;border-color: inherit;
tddisplay: table-cell;vertical-align: inherit;
templateNone.
textareaNone.
tfootdisplay: table-footer-group;vertical-align: middle;border-color: inherit;
thdisplay: table-cell;vertical-align: inherit;font-weight: bold;text-align: center;
theaddisplay: table-header-group;vertical-align: middle;border-color: inherit;
timeNone.
titledisplay: none;
trdisplay: table-row;vertical-align: inherit;border-color: inherit;
trackNone.
utext-decoration: underline;
uldisplay: block;list-style-type: disc;margin-top: 1em;margin-bottom: 1 em;margin-left: 0;margin-right: 0;padding-left: 40px;
varfont-style: italic;
videoNone.
wbrNone.

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