merge newui branch

ui/src/apiPreview/fieldsInfo.js

@@ -0,0 +1,25 @@
+export function fieldsInfo() {
+    return t.div(
+        { className: "api-fields-info" },
+        t.p(
+            null,
+            "Comma separated string of the fields to return in the JSON response (by default returns all fields). For example:",
+        ),
+        app.components.codeBlock({
+            value:
+                `// return all root level fields and only\n// "relField.someField" from expand\n?fields=*,expand.relField.someField`,
+        }),
+        t.p(null, "Use ", t.code(null, "*"), " to target all keys from the specific depth level."),
+        t.p(null, "In addition, the following field modifiers are also supported:"),
+        t.ul(
+            null,
+            t.li(
+                null,
+                t.code(null, ":excerpt(maxLength, withEllipsis?)"),
+                t.br(),
+                "Returns a short plain text version of the field string value. Ex.: ",
+                t.code(null, "?fields=*,someTextField:excerpt(200,true)"),
+            ),
+        ),
+    );
+}