mdn-browser-compat-data
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Browser compatibility data provided by MDN Web Docs
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{
"css": {
"selectors": {
"before": {
"__compat": {
"description": "<code>::before</code>",
"mdn_url": "https://developer.mozilla.org/docs/Web/CSS/::before",
"support": {
"chrome": [
{
"version_added": true
},
{
"alternative_name": ":before",
"version_added": true
}
],
"chrome_android": [
{
"version_added": true
},
{
"alternative_name": ":before",
"version_added": true
}
],
"edge": [
{
"version_added": true
},
{
"alternative_name": ":before",
"version_added": true
}
],
"edge_mobile": [
{
"version_added": true
},
{
"alternative_name": ":before",
"version_added": true
}
],
"firefox": [
{
"version_added": "1.5",
"notes": [
"Before Firefox 57, Firefox had a bug where <code>::before</code> pseudo-elements were still generated, even if the <a href='https://developer.mozilla.org/docs/Web/CSS/content'><code>content</code></a> property value were set to <code>normal</code> or <code>none</code>.",
"Before Firefox 3.5, only the CSS level 2 behavior of <code>:before</code> was supported, which disallowed <a href='https://developer.mozilla.org/docs/Web/CSS/position'><code>position</code></a>, <a href='https://developer.mozilla.org/docs/Web/CSS/float'><code>float</code></a>, <code>list-style-*</code> and some <code>display</code> properties."
]
},
{
"alternative_name": ":before",
"version_added": "1"
}
],
"firefox_android": [
{
"version_added": true
},
{
"alternative_name": ":before",
"version_added": true
}
],
"ie": [
{
"version_added": "9"
},
{
"alternative_name": ":before",
"version_added": "8"
}
],
"opera": [
{
"version_added": "7"
},
{
"alternative_name": ":before",
"version_added": "4"
}
],
"opera_android": {
"version_added": null
},
"safari": [
{
"version_added": "4"
},
{
"alternative_name": ":before",
"version_added": "4"
}
],
"safari_ios": {
"version_added": "5.1"
},
"samsunginternet_android": {
"version_added": true
},
"webview_android": [
{
"version_added": true
},
{
"alternative_name": ":before",
"version_added": true
}
]
},
"status": {
"experimental": false,
"standard_track": true,
"deprecated": false
}
},
"animation_and_transition_support": {
"__compat": {
"description": "Animation and transition support",
"support": {
"chrome": {
"version_added": "26"
},
"chrome_android": {
"version_added": true
},
"edge": {
"version_added": true
},
"edge_mobile": {
"version_added": true
},
"firefox": {
"version_added": "4"
},
"firefox_android": {
"version_added": "4"
},
"ie": {
"version_added": false
},
"opera": {
"version_added": false
},
"opera_android": {
"version_added": false
},
"safari": {
"version_added": false
},
"safari_ios": {
"version_added": false
},
"samsunginternet_android": {
"version_added": true
},
"webview_android": {
"version_added": true
}
},
"status": {
"experimental": false,
"standard_track": true,
"deprecated": false
}
}
}
}
}
}
}