New Post: Is there any way to update the OuterHtml?

Is there any solution to update the OuterHtml, like we can update the InnerHtml? Or, probably there is another solution than OuterHtml?

Here is my case:
Currently, I have this html string:
<div id="table-timesheet-preview" class="{MO-CSS-CLASS value="TimeSheet"}">
</div>

And I want to change it to be:
<div id="table-timesheet-preview" class='{MO-CSS-CLASS value="TimeSheet"}'>
</div>

My logic is by getting the div based on "table-timesheet-preview", retrieving the OuterHtml (readonly), and ???

I can't use the InnerHtml, because it only contains of the inside html of "table-timesheet-preview", not the div itself.