white-space

Since: UXP v3.0

Determines how white space is handled. Supports wrap (default), nowrap, pre, pre-line, and pre-wrap.

See: https://developer.mozilla.org/en/docs/Web/CSS/white-space

Example:

.someElement {
    white-space: pre;
}
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1.someElement {
2    white-space: pre;
3}