It seems like there is a certain event that triggers the changes in the content of this specific div element. To accomplish this, you would need to incorporate JavaScript along with HTML and CSS, as they alone may not be sufficient for this task.
Check out this example on JSFiddle
Here's a basic demonstration of how this can be achieved. The implementation may vary based on the desired outcome:
<div id="myDiv">
Hello
</div>
<button onclick="addText()">
Click to change div
</button>
Furthermore,
function checkWidth() {
var div = document.getElementById('myDiv');
if(div.offsetWidth > 100) {
div.style.border = "1px solid black"
}
}
function addText() {
var div = document.getElementById('myDiv');
div.style.width="250px";
div.innerText = "AAAAAAAAAAAAA VVVVVVEERRRRY LOOOONNNNGGG TEEEEEXXXXXTT";
checkWidth();
}