fix: adjust scroll threshold for fetching more items in Select component (#359)

Signed-off-by: ya zhou <[email protected]>

Author: yazhouio

.gitignore

@@ -19,3 +19,5 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+docs/
+packages

src/components/Select/Select.jsx

@@ -288,7 +288,7 @@ export default class Select extends React.Component {
     const { onFetch, pagination = {} } = this.props;
     const { page = 1 } = pagination;
     const { scrollTop, scrollHeight, clientHeight } = e.target;
-    if (Math.abs(scrollTop + clientHeight - scrollHeight) <= 1) {
+    if (Math.abs(scrollHeight - scrollTop - clientHeight) <= 32) {
       this.reachBottom = true;
       onFetch({ page: page + 1, more: true });
     }