notes/node_modules/caniuse-db/features-json/css-optional-pseudo.json

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{
"title":":optional CSS pseudo-class",
"description":"The `:optional` pseudo-class matches form inputs (`<input>`, `<textarea>`, `<select>`) which are not `:required`.",
"spec":"https://drafts.csswg.org/selectors-4/#optional-pseudo",
"status":"unoff",
"links":[
{
"url":"https://html.spec.whatwg.org/multipage/scripting.html#selector-optional",
"title":"HTML specification for `:optional`"
},
{
"url":"https://developer.mozilla.org/en-US/docs/Web/CSS/:optional",
"title":"Mozilla Developer Network article"
},
{
"url":"http://jsbin.com/fihudu/edit?html,css,output",
"title":"JS Bin testcase"
}
],
"bugs":[
],
"categories":[
"CSS"
],
"stats":{
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"5.5":"n",
"6":"n",
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},
"opera":{
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},
"op_mini":{
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},
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},
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},
"and_qq":{
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}
},
"notes":"",
"notes_by_num":{
"1":"Does not match non-required `<select>`s"
},
"usage_perc_y":93.83,
"usage_perc_a":3.59,
"ucprefix":false,
"parent":"form-validation",
"keywords":":optional,optional,:required,required",
"ie_id":"",
"chrome_id":"",
"firefox_id":"",
"webkit_id":"",
"shown":true
}