Avoiding border radius with text in span - html

Question

I have an editable span with rounded corners as shown in the picture below. As you can see, the text runs off the corner and I would love a way to keep the text inside the box. is there a good way to do this? I don't want to add padding that goes all the way down the sides or across the top, I really just want to avoid the corners with border-radii. Here is a JSFiddle demonstrating the current state.
Thanks!
Current CSS:
#container {
box-sizing: border-box;
position: absolute;
transition: border 0.2s;
border: 2px solid rgba(128, 223, 255, 0);
border-radius: 7px;
display: table-row;
height: 200px;
width: 300px;
}
.typeSpace {
background-color: green;
display: inline;
position: absolute;
bottom: 0;
text-align:center;
white-space: nowrap;
left: 10px;
right: 10px;
overflow: auto;
-ms-overflow-style: none;
overflow-y: hidden;
text-align: left;
}
#borderText {
left: 0;
right: 0;
bottom: 0;
top: 0;
font-size: 17px);
white-space: normal;
line-height: 15px);
border-radius: 20px 20px 0 0;
}

Answer 1

So what you want this to look like, is something like this? _ representing automatic "spacing".
_XX XXX X_
XXX XXX XX
X XXXX XXX
This could be done by inserting two elements into the span before the text, and then floating one to the left, and one to the right.
Only, your span is editable here (was that supposed to be contenteditable, or are you using some other mechanism? Either way, shouldn't matter) - so those would be likely to be removed by the user, when they modify the text content.
Okay, pseudo elements to the rescue! But wait, only ::before would actually come before the text, ::after would come behind it - and behind doesn't do us any good, when it comes to floating.
But we can use the ::before pseudo element to generate the space on the right - and use text-indent for that on the left.
#container {
box-sizing: border-box;
position: absolute;
transition: border 0.2s;
border: 2px solid rgba(128, 223, 255, 0);
border-radius: calc(var(--scale)*7px);
display: table-row;
height: 200px;
width: 300px;
}
.typeSpace {
background-color: green;
display: inline;
position: absolute;
bottom: 0;
text-align: center;
white-space: nowrap;
left: calc(var(--scale) * 10px);
right: calc(var(--scale) * 10px);
overflow: auto;
-ms-overflow-style: none;
overflow-y: hidden;
text-align: left;
text-indent: 1em; /* provides the spacing on the left */
}
#borderText {
left: 0;
right: 0;
bottom: 0;
top: 0;
font-size: calc(var(--scale) * 17px);
white-space: normal;
line-height: calc(var(--scale) * 15px);
border-radius: 20px 20px 0 0;
}
/* provides the spacing on the right */
.typeSpace::before {
content: "";
float: right;
width: 1em;
}
<div id="container">
<span class="typeSpace" id="borderText" editable>I wish I could see the corners of this text right here</span>
</div>
Of course this will only work for the top corners - if you needed the same thing at the bottom, this method won't do.
Using CSS Shapes would probably be another way to do it - but this one here is easier, I think.