How to Create a Responsive Separator for Horizontal Lists That Disappears on Line Breaks?

Responsive Separator for Horizontal List

Question:

How can you remove separators at line breaks caused by changes in viewport size?

Example:

| Item 1 | Item 2 | Item 3 | Item 4 | Item 5 |
|---|---|---|---|---|

When the viewport narrows:

Item 1	Item 2	Item 3
Item 4	Item 5

Note that the separator remains at the line break.

Possible Solution:

CSS-only:

You can leverage the collapsing of trailing white spaces:

b {
    background: red;
    outline: 1px solid blue;
}
div {
    resize: both;
    overflow: hidden;
}

<div>
    word<b> </b>.repeat(42)
</div>

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