lepu-test-platform-web/node_modules/caniuse-db/features-json/rem.json

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{
"title":"rem (root em) units",
"description":"Type of unit similar to `em`, but relative only to the root element, not any parent element. Thus compounding does not occur as it does with `em` units.",
"spec":"https://www.w3.org/TR/css3-values/#font-relative-lengths",
"status":"cr",
"links":[
{
"url":"http://snook.ca/archives/html_and_css/font-size-with-rem",
"title":"Article on usage"
},
{
"url":"https://github.com/chuckcarpenter/REM-unit-polyfill",
"title":"REM Polyfill"
}
],
"bugs":[
{
"description":"IE 9, 10 and 11 do not support rem units when used in the \"line-height\" property when used on :before and :after pseudo elements (https://connect.microsoft.com/IE/feedback/details/776744)."
},
{
"description":"Borders sized in \"rem\" disappear when the page is zoomed out in Chrome."
},
{
"description":"Reportedly does not work on Android 4.3 browser for Samsung Note II or the Samsung Galaxy Tab 2 on Android 4.2."
},
{
"description":"Chrome 31-34 & Chrome-based Android versions (like 4.4) [have a font size bug](https://code.google.com/p/chromium/issues/detail?id=319623) that occurs when the root element has a percentage-based size."
},
{
"description":"Causes content display and scrolling issues on iPhone 4 which typically has Safari 5.1."
}
],
"categories":[
"CSS3"
],
"stats":{
"ie":{
"5.5":"n",
"6":"n",
"7":"n",
"8":"n",
"9":"a #1",
"10":"a #1",
"11":"y"
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"12":"y",
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"18":"y",
"79":"y",
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"firefox":{
"2":"n",
"3":"n",
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"3.6":"y",
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},
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"ios_saf":{
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},
"op_mini":{
"all":"y"
},
"android":{
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"bb":{
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"and_chr":{
"84":"y"
},
"and_ff":{
"79":"y"
},
"ie_mob":{
"10":"y",
"11":"y"
},
"and_uc":{
"12.12":"y"
},
"samsung":{
"4":"y",
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"and_qq":{
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},
"kaios":{
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}
},
"notes":"",
"notes_by_num":{
"1":"IE 9 & IE 10 do not support `rem` units when used in the `font` shorthand property (the entire declaration is ignored) or when used on pseudo elements.",
"2":"iOS Safari 5.0-5.1 support `rem` but not in combination with media queries."
},
"usage_perc_y":98.27,
"usage_perc_a":0.25,
"ucprefix":false,
"parent":"",
"keywords":"rems",
"ie_id":"",
"chrome_id":"",
"firefox_id":"",
"webkit_id":"",
"shown":true
}