mirror of https://github.com/thangisme/notes.git
305 lines
5.7 KiB
JSON
305 lines
5.7 KiB
JSON
{
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"title":"rem (root em) units",
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"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.",
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"spec":"http://www.w3.org/TR/css3-values/#font-relative-lengths",
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"status":"cr",
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"links":[
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{
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"url":"http://snook.ca/archives/html_and_css/font-size-with-rem",
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"title":"Article on usage"
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},
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{
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"url":"https://github.com/chuckcarpenter/REM-unit-polyfill",
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"title":"REM Polyfill"
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}
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],
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"bugs":[
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{
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"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)."
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},
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{
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"description":"Borders sized in \"rem\" disappear when the page is zoomed out in Chrome."
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},
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{
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"description":"Reportedly does not work on Android 4.3 browser for Samsung Note II or the Samsung Galaxy Tab 2 on Android 4.2."
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},
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{
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"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."
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},
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{
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"description":"Causes content display and scrolling issues on iPhone 4 which typically has Safari 5.1."
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}
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],
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"categories":[
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"CSS3"
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],
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"stats":{
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"ie":{
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"5.5":"n",
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"6":"n",
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"7":"n",
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"8":"n",
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"9":"a #1",
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"10":"a #1",
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"11":"y"
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},
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"edge":{
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"12":"y",
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"13":"y",
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"14":"y",
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"15":"y"
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},
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"firefox":{
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"2":"n",
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"3":"n",
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"3.5":"n",
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"3.6":"y",
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"4":"y",
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"5":"y",
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"6":"y",
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"7":"y",
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"8":"y",
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"9":"y",
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"10":"y",
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"11":"y",
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"12":"y",
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"13":"y",
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"14":"y",
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"15":"y",
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"16":"y",
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"17":"y",
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"18":"y",
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"19":"y",
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"20":"y",
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"21":"y",
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"22":"y",
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"23":"y",
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"24":"y",
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"25":"y",
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"26":"y",
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"27":"y",
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"28":"y",
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"29":"y",
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"30":"y",
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"31":"y",
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"32":"y",
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"33":"y",
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"34":"y",
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"35":"y",
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"36":"y",
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"37":"y",
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"38":"y",
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"39":"y",
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"40":"y",
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"41":"y",
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"42":"y",
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"43":"y",
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"44":"y",
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"45":"y",
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"46":"y",
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"47":"y",
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"48":"y",
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"49":"y",
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"50":"y",
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"51":"y",
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"52":"y",
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"53":"y",
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"54":"y"
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},
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"chrome":{
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"4":"y",
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"5":"y",
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"6":"y",
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"7":"y",
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"8":"y",
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"9":"y",
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"10":"y",
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"11":"y",
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"12":"y",
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"13":"y",
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"14":"y",
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"15":"y",
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"16":"y",
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"17":"y",
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"18":"y",
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"19":"y",
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"20":"y",
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"21":"y",
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"22":"y",
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"23":"y",
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"24":"y",
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"25":"y",
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"26":"y",
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"27":"y",
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"28":"y",
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"29":"y",
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"30":"y",
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"31":"y",
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"32":"y",
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"33":"y",
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"34":"y",
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"35":"y",
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"36":"y",
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"37":"y",
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"38":"y",
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"39":"y",
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"40":"y",
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"41":"y",
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"42":"y",
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"43":"y",
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"44":"y",
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"45":"y",
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"46":"y",
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"47":"y",
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"48":"y",
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"49":"y",
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"50":"y",
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"51":"y",
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"52":"y",
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"53":"y",
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"54":"y",
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"55":"y",
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"56":"y",
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"57":"y",
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"58":"y",
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"59":"y"
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},
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"safari":{
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"3.1":"n",
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"3.2":"n",
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"4":"n",
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"5":"y",
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"5.1":"y",
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"6":"y",
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"6.1":"y",
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"7":"y",
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"7.1":"y",
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"8":"y",
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"9":"y",
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"9.1":"y",
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"10":"y",
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"10.1":"y",
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"TP":"y"
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},
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"opera":{
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"9":"n",
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"9.5-9.6":"n",
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"10.0-10.1":"n",
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"10.5":"n",
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"10.6":"n",
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"11":"n",
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"11.1":"n",
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"11.5":"n",
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"11.6":"y",
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"12":"y",
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"12.1":"y",
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"15":"y",
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"16":"y",
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"17":"y",
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"18":"y",
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"19":"y",
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"20":"y",
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"21":"y",
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"22":"y",
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"23":"y",
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"24":"y",
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"25":"y",
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"26":"y",
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"27":"y",
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"28":"y",
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"29":"y",
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"30":"y",
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"31":"y",
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"32":"y",
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"33":"y",
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"34":"y",
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"35":"y",
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"36":"y",
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"37":"y",
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"38":"y",
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"39":"y",
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"40":"y",
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"41":"y",
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"42":"y",
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"43":"y",
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"44":"y",
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"45":"y"
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},
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"ios_saf":{
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"3.2":"n",
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"4.0-4.1":"y",
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"4.2-4.3":"y",
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"5.0-5.1":"a #2",
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"6.0-6.1":"y",
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"7.0-7.1":"y",
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"8":"y",
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"8.1-8.4":"y",
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"9.0-9.2":"y",
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"9.3":"y",
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"10.0-10.2":"y"
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},
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"op_mini":{
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"all":"y"
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},
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"android":{
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"2.1":"y",
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"2.2":"y",
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"2.3":"y",
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"3":"y",
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"4":"y",
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"4.1":"y",
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"4.2-4.3":"y",
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"4.4":"y",
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"4.4.3-4.4.4":"y",
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"53":"y"
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},
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"bb":{
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"7":"y",
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"10":"y"
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},
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"op_mob":{
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"10":"n",
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"11":"n",
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"11.1":"n",
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"11.5":"n",
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"12":"y",
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"12.1":"y",
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"37":"y"
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},
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"and_chr":{
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"56":"y"
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},
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"and_ff":{
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"51":"y"
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},
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"ie_mob":{
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"10":"y",
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"11":"y"
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},
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"and_uc":{
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"11":"y"
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},
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"samsung":{
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"4":"y"
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},
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"and_qq":{
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"1.2":"y"
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}
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},
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"notes":"",
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"notes_by_num":{
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"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.",
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"2":"iOS Safari 5.0-5.1 support `rem` but not in combination with media queries."
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},
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"usage_perc_y":97.18,
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"usage_perc_a":0.53,
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"ucprefix":false,
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"parent":"",
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"keywords":"rems",
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"ie_id":"",
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"chrome_id":"",
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"firefox_id":"",
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"webkit_id":"",
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"shown":true
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}
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