diff --git a/examples/custom-icon.tsx b/examples/custom-icon.tsx
index 92d0ea850..e2389f6bd 100644
--- a/examples/custom-icon.tsx
+++ b/examples/custom-icon.tsx
@@ -1,4 +1,4 @@
-/* eslint-disable no-console */
+/* eslint-disable no-console, max-classes-per-file */
 import React from 'react';
 import Select, { Option } from '../src';
 import '../assets/index.less';
@@ -22,7 +22,7 @@ const clearPath =
   ' 0-8 3.6-8 8v60c0 4.4 3.6 8 8 8h618c35.3 0 64-' +
   '28.7 64-64V306c0-35.3-28.7-64-64-64z';
 
-const menuItemSelectedIcon = props => {
+const menuItemSelectedIcon = (props) => {
   const { ...p } = props;
   return <span style={{ position: 'absolute', right: 0 }}>{p.isSelected ? '🌹' : '☑️'}</span>;
 };
@@ -33,7 +33,7 @@ const singleItemIcon = (
   </span>
 );
 
-const getSvg = path => (
+const getSvg = (path) => (
   <i>
     <svg
       viewBox="0 0 1024 1024"
@@ -60,7 +60,7 @@ class CustomIconComponent extends React.Component {
     });
   };
 
-  onKeyDown = e => {
+  onKeyDown = (e) => {
     const { value } = this.state;
     if (e.keyCode === 13) {
       console.log('onEnter', value);
@@ -158,7 +158,7 @@ class Test extends React.Component {
     console.log(args);
   };
 
-  useAnim = e => {
+  useAnim = (e) => {
     this.setState({
       useAnim: e.target.checked,
     });
diff --git a/src/Selector/index.tsx b/src/Selector/index.tsx
index 9078b5555..d1fb1e2a3 100644
--- a/src/Selector/index.tsx
+++ b/src/Selector/index.tsx
@@ -11,11 +11,11 @@
 import * as React from 'react';
 import { useRef } from 'react';
 import KeyCode from 'rc-util/lib/KeyCode';
-import { ScrollTo } from 'rc-virtual-list/lib/List';
+import type { ScrollTo } from 'rc-virtual-list/lib/List';
 import MultipleSelector from './MultipleSelector';
 import SingleSelector from './SingleSelector';
-import { LabelValueType, RawValueType, CustomTagProps } from '../interface/generator';
-import { RenderNode, Mode } from '../interface';
+import type { LabelValueType, RawValueType, CustomTagProps } from '../interface/generator';
+import type { RenderNode, Mode } from '../interface';
 import useLock from '../hooks/useLock';
 
 export interface InnerSelectorProps {
@@ -129,7 +129,7 @@ const Selector: React.RefForwardingComponent<RefSelectorProps, SelectorProps> =
   // ====================== Input ======================
   const [getInputMouseDown, setInputMouseDown] = useLock(0);
 
-  const onInternalInputKeyDown: React.KeyboardEventHandler<HTMLInputElement> = event => {
+  const onInternalInputKeyDown: React.KeyboardEventHandler<HTMLInputElement> = (event) => {
     const { which } = event;
 
     if (which === KeyCode.UP || which === KeyCode.DOWN) {
@@ -172,12 +172,16 @@ const Selector: React.RefForwardingComponent<RefSelectorProps, SelectorProps> =
     compositionStatusRef.current = true;
   };
 
-  const onInputCompositionEnd: React.CompositionEventHandler<HTMLInputElement> = e => {
+  const onInputCompositionEnd: React.CompositionEventHandler<HTMLInputElement> = (e) => {
     compositionStatusRef.current = false;
-    triggerOnSearch((e.target as HTMLInputElement).value);
+
+    // Trigger search again to support `tokenSeparators` with typewriting
+    if (mode !== 'combobox') {
+      triggerOnSearch((e.target as HTMLInputElement).value);
+    }
   };
 
-  const onInputChange: React.ChangeEventHandler<HTMLInputElement> = event => {
+  const onInputChange: React.ChangeEventHandler<HTMLInputElement> = (event) => {
     let {
       target: { value },
     } = event;
@@ -197,7 +201,7 @@ const Selector: React.RefForwardingComponent<RefSelectorProps, SelectorProps> =
     triggerOnSearch(value);
   };
 
-  const onInputPaste: React.ClipboardEventHandler = e => {
+  const onInputPaste: React.ClipboardEventHandler = (e) => {
     const { clipboardData } = e;
     const value = clipboardData.getData('text');
 
@@ -218,7 +222,7 @@ const Selector: React.RefForwardingComponent<RefSelectorProps, SelectorProps> =
     }
   };
 
-  const onMouseDown: React.MouseEventHandler<HTMLElement> = event => {
+  const onMouseDown: React.MouseEventHandler<HTMLElement> = (event) => {
     const inputMouseDown = getInputMouseDown();
     if (event.target !== inputRef.current && !inputMouseDown) {
       event.preventDefault();
diff --git a/src/generate.tsx b/src/generate.tsx
index b14e25cd2..22ee43ee2 100644
--- a/src/generate.tsx
+++ b/src/generate.tsx
@@ -12,11 +12,13 @@ import { useState, useRef, useEffect, useMemo } from 'react';
 import KeyCode from 'rc-util/lib/KeyCode';
 import classNames from 'classnames';
 import useMergedState from 'rc-util/lib/hooks/useMergedState';
-import { ScrollTo } from 'rc-virtual-list/lib/List';
-import Selector, { RefSelectorProps } from './Selector';
-import SelectTrigger, { RefTriggerProps } from './SelectTrigger';
-import { RenderNode, Mode, RenderDOMFunc, OnActiveValue } from './interface';
-import {
+import type { ScrollTo } from 'rc-virtual-list/lib/List';
+import type { RefSelectorProps } from './Selector';
+import Selector from './Selector';
+import type { RefTriggerProps } from './SelectTrigger';
+import SelectTrigger from './SelectTrigger';
+import type { RenderNode, Mode, RenderDOMFunc, OnActiveValue } from './interface';
+import type {
   GetLabeledValue,
   FilterOptions,
   FilterFunc,
@@ -29,11 +31,12 @@ import {
   FlattenOptionsType,
   SingleType,
   OnClear,
-  INTERNAL_PROPS_MARK,
   SelectSource,
-  CustomTagProps,
+  CustomTagProps} from './interface/generator';
+import {
+  INTERNAL_PROPS_MARK
 } from './interface/generator';
-import { OptionListProps, RefOptionListProps } from './OptionList';
+import type { OptionListProps, RefOptionListProps } from './OptionList';
 import { toInnerValue, toOuterValues, removeLastEnabledValue, getUUID } from './utils/commonUtil';
 import TransBtn from './TransBtn';
 import useLock from './hooks/useLock';
@@ -59,7 +62,7 @@ const DEFAULT_OMIT_PROPS = [
 export interface RefSelectProps {
   focus: () => void;
   blur: () => void;
-  scrollTo?: ScrollTo,
+  scrollTo?: ScrollTo;
 }
 
 export interface SelectProps<OptionsType extends object[], ValueType> extends React.AriaAttributes {
@@ -194,7 +197,7 @@ export interface GenerateConfig<OptionsType extends object[]> {
   getLabeledValue: GetLabeledValue<FlattenOptionsType<OptionsType>>;
   filterOptions: FilterOptions<OptionsType>;
   findValueOption: // Need still support legacy ts api
-    | ((values: RawValueType[], options: FlattenOptionsType<OptionsType>) => OptionsType)
+  | ((values: RawValueType[], options: FlattenOptionsType<OptionsType>) => OptionsType)
     // New API add prevValueOptions support
     | ((
         values: RawValueType[],
@@ -327,7 +330,7 @@ export default function generateSelector<
     const useInternalProps = internalProps.mark === INTERNAL_PROPS_MARK;
 
     const domProps = omitDOMProps ? omitDOMProps(restProps) : restProps;
-    DEFAULT_OMIT_PROPS.forEach(prop => {
+    DEFAULT_OMIT_PROPS.forEach((prop) => {
       delete domProps[prop];
     });
 
@@ -337,7 +340,8 @@ export default function generateSelector<
     const listRef = useRef<RefOptionListProps>(null);
 
     const tokenWithEnter = useMemo(
-      () => (tokenSeparators || []).some(tokenSeparator => ['\n', '\r\n'].includes(tokenSeparator)),
+      () =>
+        (tokenSeparators || []).some((tokenSeparator) => ['\n', '\r\n'].includes(tokenSeparator)),
       [tokenSeparators],
     );
 
@@ -446,7 +450,7 @@ export default function generateSelector<
       });
       if (
         mode === 'tags' &&
-        filteredOptions.every(opt => opt[optionFilterProp] !== mergedSearchValue)
+        filteredOptions.every((opt) => opt[optionFilterProp] !== mergedSearchValue)
       ) {
         filteredOptions.unshift({
           value: mergedSearchValue,
@@ -682,7 +686,7 @@ export default function generateSelector<
 
         if (mode !== 'tags') {
           patchRawValues = patchLabels
-            .map(label => {
+            .map((label) => {
               const item = mergedFlattenOptions.find(
                 ({ data }) => data[mergedOptionLabelProp] === label,
               );
@@ -695,7 +699,7 @@ export default function generateSelector<
           new Set<RawValueType>([...mergedRawValue, ...patchRawValues]),
         );
         triggerChange(newRawValues);
-        newRawValues.forEach(newRawValue => {
+        newRawValues.forEach((newRawValue) => {
           triggerSelect(newRawValue, true, 'input');
         });
 
@@ -719,9 +723,11 @@ export default function generateSelector<
     // If menu is open, OptionList will take charge
     // If mode isn't tags, press enter is not meaningful when you can't see any option
     const onSearchSubmit = (searchText: string) => {
-      const newRawValues = Array.from(new Set<RawValueType>([...mergedRawValue, searchText]));
+      const newRawValues = Array.from(
+        new Set<RawValueType>([...mergedRawValue, searchText]),
+      );
       triggerChange(newRawValues);
-      newRawValues.forEach(newRawValue => {
+      newRawValues.forEach((newRawValue) => {
         triggerSelect(newRawValue, true, 'input');
       });
       setInnerSearchValue('');
@@ -845,10 +851,10 @@ export default function generateSelector<
       }
     };
 
-    const activeTimeoutIds: number[] = [];
+    const activeTimeoutIds: any[] = [];
     useEffect(
       () => () => {
-        activeTimeoutIds.forEach(timeoutId => clearTimeout(timeoutId));
+        activeTimeoutIds.forEach((timeoutId) => clearTimeout(timeoutId));
         activeTimeoutIds.splice(0, activeTimeoutIds.length);
       },
       [],
diff --git a/tests/Combobox.test.tsx b/tests/Combobox.test.tsx
index cd688b5e5..58ff9f1cf 100644
--- a/tests/Combobox.test.tsx
+++ b/tests/Combobox.test.tsx
@@ -1,8 +1,11 @@
+/* eslint-disable max-classes-per-file */
+
 import { mount } from 'enzyme';
 import KeyCode from 'rc-util/lib/KeyCode';
 import React from 'react';
 import { resetWarned } from 'rc-util/lib/warning';
-import Select, { Option, SelectProps } from '../src';
+import type { SelectProps } from '../src';
+import Select, { Option } from '../src';
 import focusTest from './shared/focusTest';
 import keyDownTest from './shared/keyDownTest';
 import openControlledTest from './shared/openControlledTest';
@@ -11,7 +14,7 @@ import allowClearTest from './shared/allowClearTest';
 import throwOptionValue from './shared/throwOptionValue';
 
 async function delay(timeout = 0) {
-  return new Promise(resolve => {
+  return new Promise((resolve) => {
     setTimeout(resolve, timeout);
   });
 }
@@ -139,13 +142,16 @@ describe('Select.Combobox', () => {
         public handleChange = () => {
           setTimeout(() => {
             this.setState({
-              data: [{ key: '1', label: '1' }, { key: '2', label: '2' }],
+              data: [
+                { key: '1', label: '1' },
+                { key: '2', label: '2' },
+              ],
             });
           }, 500);
         };
 
         public render() {
-          const options = this.state.data.map(item => (
+          const options = this.state.data.map((item) => (
             <Option value={item.key}>{item.label}</Option>
           ));
           return (
@@ -174,19 +180,25 @@ describe('Select.Combobox', () => {
       jest.useFakeTimers();
       class AsyncCombobox extends React.Component {
         public state = {
-          data: [{ key: '1', label: '1' }, { key: '2', label: '2' }],
+          data: [
+            { key: '1', label: '1' },
+            { key: '2', label: '2' },
+          ],
         };
 
         public onSelect = () => {
           setTimeout(() => {
             this.setState({
-              data: [{ key: '3', label: '3' }, { key: '4', label: '4' }],
+              data: [
+                { key: '3', label: '3' },
+                { key: '4', label: '4' },
+              ],
             });
           }, 500);
         };
 
         public render() {
-          const options = this.state.data.map(item => (
+          const options = this.state.data.map((item) => (
             <Option value={item.key}>{item.label}</Option>
           ));
           return (
@@ -243,10 +255,7 @@ describe('Select.Combobox', () => {
         </Select>,
       );
 
-      wrapper
-        .find('.rc-select-item-option')
-        .first()
-        .simulate('mouseMove');
+      wrapper.find('.rc-select-item-option').first().simulate('mouseMove');
 
       expect(wrapper.find('input').props().value).toBeFalsy();
     });
@@ -341,7 +350,7 @@ describe('Select.Combobox', () => {
         options: [],
       };
 
-      public updateOptions = value => {
+      public updateOptions = (value) => {
         const options = [value, value + value, value + value + value];
         this.setState({
           options,
@@ -351,7 +360,7 @@ describe('Select.Combobox', () => {
       public render() {
         return (
           <Select mode="combobox" onChange={this.updateOptions}>
-            {this.state.options.map(opt => (
+            {this.state.options.map((opt) => (
               <Option value={opt}>{opt}</Option>
             ))}
           </Select>
@@ -459,4 +468,21 @@ describe('Select.Combobox', () => {
       expect(wrapper.find('input').props().maxLength).toBe(6);
     });
   });
+
+  it('typewriting should not trigger onChange multiple times', () => {
+    const onChange = jest.fn();
+    const wrapper = mount(<Select mode="combobox" onChange={onChange} />);
+
+    wrapper.find('input').simulate('compositionStart', { target: { value: '' } });
+    wrapper.find('input').simulate('change', { target: { value: 'a' } });
+    expect(onChange).toHaveBeenCalledTimes(1);
+    expect(onChange).toHaveBeenLastCalledWith('a', expect.anything());
+
+    wrapper.find('input').simulate('change', { target: { value: '啊' } });
+    expect(onChange).toHaveBeenCalledTimes(2);
+    expect(onChange).toHaveBeenLastCalledWith('啊', expect.anything());
+
+    wrapper.find('input').simulate('compositionEnd', { target: { value: '啊' } });
+    expect(onChange).toHaveBeenCalledTimes(2);
+  });
 });
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 000000000..499a039e8
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "esnext",
+    "moduleResolution": "node",
+    "baseUrl": "./",
+    "jsx": "preserve",
+    "declaration": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "paths": {
+      "@/*": ["src/*"],
+      "@@/*": ["src/.umi/*"],
+      "rc-table": ["src/index.ts"]
+    }
+  }
+}
\ No newline at end of file