The content of this article is about the solution to the problem that overflow-y: visible; does not work in CSS. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
Scenario
One of the recent requirements is a h5 page on the mobile side. It requires a row of selectable cards. The part beyond the container can be slid left and right. At the same time, there must be a delete button in the upper left corner of each card. button. As shown below:
I thought: so easy, add a max-width: 200px; white-space: nowrap; overflow- on the parent container x: auto; That’s it. The demo is as follows:
<div>
??<div>
????<div></div>
??</div>
??<div>
????<div></div>
??</div>
??<div>
????<div></div>
??</div>
</div>
.container?{
??max-width:?500px;
??overflow-x:?auto;
??white-space:?nowrap;
}
.son?{
??display:?inline-block;
??width:?200px;
??height:?200px;
??background-color:?lightblue;
??position:?relative;
??margin-right:?20px;
}
.delete_btn?{
??width:?20px;
??height:?20px;
??position:?absolute;
??top:?0;
??left:?0;
??background-color:?red;
??transform:?translateX(-50%)?translateY(-50%);
}
I thought everything went well, but the result is as shown below:
Look at the red in the upper left corner of the rectangle Blocks, part of the original 20 * 20 red block is hidden. I thought it was caused by overflow, so I tried to use overflow-y: visible; to solve it, but it didn't work. Careful friends should remember that the default value of overflow is visible. So what is the reason?
Why
After searching for a long time, I roughly understand that the reason is as follows
The?computed?values?of?‘overflow-x’?and?‘overflow-y’?are?the?same?as?their?specified?values,?except?that?some?combinations?with?‘visible’?are?not?possible:?if?one?is?specified?as?‘visible’?and?the?other?is?‘scroll’?or?‘a(chǎn)uto’,?then?‘visible’?is?set?to?‘a(chǎn)uto’.?The?computed?value?of?‘overflow’?is?equal?to?the?computed?value?of?‘overflow-x’?if?‘overflow-y’?is?the?same;?otherwise?it?is?the?pair?of?computed?values?of?‘overflow-x’?and?‘overflow-y’.
The rough meaning is that when overflow-x is scroll or auto, overflow-y is set to auto and vice versa. This is very embarrassing, so how to solve this problem.
ps: The above paragraph comes from the w3c document, but I have been searching for a long time and can’t find the original text. If you find it, please leave a link~ [Manual Dog Head]
How
After all, I still want the red square in the upper left corner to be displayed completely. So what is the solution? What I use here is to add the following style to container
padding-top:?20px; margin-top:?-20px;
The principle is actually quite good Simply, after adding padding-top: 20px;, the absolutely positioned red square will have space to display without exceeding the container volume, and then use margin-top: -20px; to offset the change in position. As shown in the figure
ps: The covered part on the left side of the first red square is solved with the same idea, that is, it is processed through padding-left and margin-left.
Related recommendations:
iframe double scroll bar solution CSS3 overflow-y attribute_html/css_WEB-ITnose
Overflow processing application of HTML tags_HTML/Xhtml_Web page production
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