Css属性访问特定的selectInput并使初始元素变为粗体 [英] Css attribute to access a specific selectInput and make the initial element bold
本文介绍了Css属性访问特定的selectInput并使初始元素变为粗体的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
<！DOCTYPE html>
< html>
< body>
< style>
选项：第一个孩子{
font-weight：bold;
颜色：＃000000;
}
< / style>
< select>
< option value =volvo>沃尔沃< / option>
< option value =saab> Saab< / option>
< / select>
< select>
< option value =a1> Volvo1< / option>
< option value =a2> Saab1< / option>
< / select>
< select>
< option value =v1> Volvo2< / option>
< option value =v2> Saab2< / option>
< / select>
< / body>
< / html>
解决方案
您可以在css中使用 nth-child 来选择特定的选择标签，并将其第一个选项设置为粗体。
$ b
select：nth-child（3）选项：first-child {
font-weight：bold;
颜色：＃000000;
}
请参阅下面的codepen
the given html script creates three selectInputs and updates the first element of all the three selectInputs black and bold. I just want to make the change to the third selectInput Box and not the other two. Please help me with an appropriate css attribute to achieve this.
<!DOCTYPE html>
<html>
<body>
<style>
option:first-child{
font-weight:bold;
color:#000000;
}
</style>
<select>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
</select>
<select>
<option value="a1">Volvo1</option>
<option value="a2">Saab1</option>
</select>
<select>
<option value="v1">Volvo2</option>
<option value="v2">Saab2</option>
</select>
</body>
</html>
解决方案
You can use nth-child in css to select particular select tag and make its first option as bold like u did.
select:nth-child(3) option:first-child{
font-weight:bold;
color:#000000;
}
see the codepen below
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