:first-child

Since UXP v3.0

Matches only the first child.

See: https://developer.mozilla.org/en-US/docs/Web/CSS/:first-child

Example:

Copy
sp-button:first-child {
    margin-left: 0;
}
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sp-button:first-child {
    margin-left: 0;
}

Last updated 3/8/2023

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