JavaScript，CSS：Clip在父DIV中

Question

Context

I have a bunch of nested DIVs (implementing a simple window system, for learning purposes, with DIVs).

Problem:

Let divA = child of divB.

Now, ideally, I want the contents of divA to be "clipped" inside of divB.

Thus, if I take divA, and drag it to the right ... as it gets out of the border of divB, I want the parts of divA that are outside of divB to be chopped off and not displayed.

Question:

How do I do this? How do I use one div to clip / mask another div?

Thanks!

Answer 1

It's called:

.divA {
    overflow: hidden;
}

w3 schools

Answer 2

Use the css overflow property. Follow this link to see what values there are for overflow