js判断为空Null与字符串为空简写方法
[ 2019-09-04 15:50:28 | 作者: admin ]
if (str !== null || str !== undefined || str !== '') {
var str2 = str ;
}
var str2 = str ;
}
CSS Radio 样式美化
[ 2019-09-04 15:47:50 | 作者: admin ]
https://c.runoob.com/codedemo/3373
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body {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
-webkit-box-pack: center;
-ms-flex-pack: center;
justify-content: center;
min-height: 100vh;
}
.radio {
...display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
-webkit-box-pack: center;
-ms-flex-pack: center;
justify-content: center;
min-height: 100vh;
}
.radio {
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