;My Field&quot;).update({ Description: &quot;My Description&quot; });

// if you need to update a field with properties for a specific field type you can optionally include the field type as a second param
// if you do not include it we will look up the type, but that adds a call to the server
const fieldUpdate2 = await sp.web.lists.getByTitle(&quot;My List&quot;).fields.getByTitle(&quot;My Look up Field&quot;).update({ RelationshipDeleteBehavior: 1 }, &quot;SP.FieldLookup&quot;);
</code></pre>
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