[英]How to create generic CSS class with input parameter
I am showing list of items on UI. 我正在UI上显示项目列表。 Those items have attribute as tLevel. 这些项目的属性为tLevel。 Depending on tLevel value I want to create tree structure. 根据tLevel的值,我想创建树结构。
Something like this 像这样
item1 tLevel=0
item2 tLevel=1
item3 tLevel=2
item4 tLevel=1
item5 tLevel=2
item6 tLevel=3
item7 tLevel=3
item8 tLevel=3
item9 tLevel=0
item10 tLevel=1
item11 tLevel=1
HTML template HTML模板
<div class="treeLevelCSS(' + tLevel + ')" />
CSS should be something like CSS应该像
.treeLevelCSS(tLevel){
"margin-left: " + (tLevel * 15) + "px"
}
I am not sure what I have written above in HTML and CSS is right, but just to give an idea of what I want to achieve here. 我不确定我上面用HTML和CSS编写的内容是正确的,只是想对我想要在这里实现的内容有所了解。
If possible it might be beneficial to use nested lists here, with each level just having padding applied to it. 如果可能的话,在这里使用嵌套列表可能是有益的,每个级别仅对其应用填充即可。
For example: 例如:
<ul>
<li>1</li>
<li>
<ul>
<li>2</li>
<li>
<ul>
<li>3</li>
</ul>
</li>
<li>2</li>
</ul>
</li>
<li>1</li>
</ul>
and... 和...
li {
list-style:none;
}
ul ul {
padding-left:20px;
}
Should do the job, demo: http://codepen.io/merlinmason/pen/vORaVB 应该做的事,演示: http : //codepen.io/merlinmason/pen/vORaVB
If you're using Less, what you need in a simplest case is a mixin and selector "interpolation" , eg: 如果您使用的是Less,那么在最简单的情况下,您需要的是mixin和选择器“ interpolation” ,例如:
.treeLevel(0);
.treeLevel(1);
.treeLevel(2);
.treeLevel(3);
.treeLevel(@level) {
.treeLevelCSS@{level} {
margin-left: @level * 15px;
}
}
Then, depending on your needs, get it further improved with other stuff. 然后,根据您的需求,将其与其他产品一起进一步改进。 For example using loops to reduce repetition and/or possibility to generate an arbitrary number of class. 例如,使用循环来减少重复和/或生成任意数量的类的可能性。 See native Less loops and/or a syntactic sugar goodies for those like .for
: 请参阅原生的Less 循环和/或语法糖好吃的东西,例如.for
:
@import "for";
.tree-level- {
// generate 8 level classes:
.for(0, 7); .-each(@i) {
&@{i} {
margin-left: 15px * @i;
}
}
}
Codepen Demo for above (slightly modified) snippet. 上面(略有修改)代码段的Codepen演示 。
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