3
I understood that there is no line break because there are no spaces. Use the property word-wrap and set the value break-word, this will force a line break as soon as the text reaches the limits of div.
Behold.
div {
width: 200px;
word-wrap: break-word;
}
<div>
Note:InternetExplorer9andearlierversionsdonosupportWeb Workers.
</div>


Post your code beyond the image, this will help identify the problem.
– Randrade