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import React, { useRef, useState, useEffect } from 'react';

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import { styled } from '@linaria/react';

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import {

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CALYPSO,

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CALYPSO_LIGHT,

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CALYPSO_MEDIUM,

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OBSIDIAN,

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} from '../UIComponents/colors';

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import UISpinner from '../UIComponents/UISpinner';

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import LoadState, { LoadStateType } from '../enums/loadState';

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const Container = styled.div`

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color: ${OBSIDIAN};

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font-family: 'Lexend Deca', Helvetica, Arial, sans-serif;

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font-size: 14px;

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position: relative;

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interface IControlContainerProps {

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focused: boolean;

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}

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const ControlContainer = styled.div<IControlContainerProps>`

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align-items: center;

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background-color: hsl(0, 0%, 100%);

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border-color: hsl(0, 0%, 80%);

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border-radius: 4px;

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border-style: solid;

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border-width: ${props => (props.focused ? '0' : '1px')};

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cursor: default;

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display: flex;

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flex-wrap: wrap;

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justify-content: space-between;

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min-height: 38px;

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outline: 0 !important;

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position: relative;

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transition: all 100ms;

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box-sizing: border-box;

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box-shadow: ${props =>

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props.focused ? `0 0 0 2px ${CALYPSO_MEDIUM}` : 'none'};

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&:hover {

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border-color: hsl(0, 0%, 70%);

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}

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const ValueContainer = styled.div`

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align-items: center;

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display: flex;

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flex: 1;

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flex-wrap: wrap;

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padding: 2px 8px;

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position: relative;

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overflow: hidden;

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box-sizing: border-box;

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const Placeholder = styled.div`

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color: hsl(0, 0%, 50%);

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margin-left: 2px;

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margin-right: 2px;

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position: absolute;

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top: 50%;

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transform: translateY(-50%);

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box-sizing: border-box;

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font-size: 16px;

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const SingleValue = styled.div`

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color: hsl(0, 0%, 20%);

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margin-left: 2px;

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margin-right: 2px;

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max-width: calc(100% - 8px);

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overflow: hidden;

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position: absolute;

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text-overflow: ellipsis;

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white-space: nowrap;

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top: 50%;

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transform: translateY(-50%);

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box-sizing: border-box;

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const IndicatorContainer = styled.div`

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align-items: center;

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align-self: stretch;

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display: flex;

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flex-shrink: 0;

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box-sizing: border-box;

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const DropdownIndicator = styled.div`

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border-top: 8px solid ${CALYPSO};

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border-left: 6px solid transparent;

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border-right: 6px solid transparent;

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width: 0px;

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height: 0px;

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margin: 10px;

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const InputContainer = styled.div`

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margin: 2px;

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padding-bottom: 2px;

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padding-top: 2px;

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visibility: visible;

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color: hsl(0, 0%, 20%);

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box-sizing: border-box;

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const Input = styled.input`

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box-sizing: content-box;

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background: rgba(0, 0, 0, 0) none repeat scroll 0px center;

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border: 0px none;

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font-size: inherit;

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opacity: 1;

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outline: currentcolor none 0px;

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padding: 0px;

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color: inherit;

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font-family: inherit;

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const InputShadow = styled.div`

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position: absolute;

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opacity: 0;

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font-size: inherit;

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const MenuContainer = styled.div`

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position: absolute;

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top: 100%;

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background-color: #fff;

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border-radius: 4px;

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margin-bottom: 8px;

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margin-top: 8px;

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z-index: 9999;

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box-shadow: 0 0 0 1px hsla(0, 0%, 0%, 0.1), 0 4px 11px hsla(0, 0%, 0%, 0.1);

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width: 100%;

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const MenuList = styled.div`

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max-height: 300px;

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overflow-y: auto;

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padding-bottom: 4px;

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padding-top: 4px;

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position: relative;

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const MenuGroup = styled.div`

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padding-bottom: 8px;

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padding-top: 8px;

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const MenuGroupHeader = styled.div`

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color: #999;

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cursor: default;

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font-size: 75%;

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font-weight: 500;

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margin-bottom: 0.25em;

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text-transform: uppercase;

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padding-left: 12px;

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padding-left: 12px;

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interface IMenuItemProps {

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selected: boolean;

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}

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const MenuItem = styled.div<IMenuItemProps>`

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display: block;

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background-color: ${props =>

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props.selected ? CALYPSO_MEDIUM : 'transparent'};

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color: ${props => (props.selected ? '#fff' : 'inherit')};

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cursor: default;

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font-size: inherit;

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width: 100%;

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padding: 8px 12px;

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&:hover {

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background-color: ${props =>

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props.selected ? CALYPSO_MEDIUM : CALYPSO_LIGHT};

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}

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interface IAsyncSelectProps {

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placeholder: string;

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value: any;

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loadOptions?: Function;

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defaultOptions?: any[];

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onChange: Function;

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}

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export default function AsyncSelect({

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placeholder,

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value,

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loadOptions,

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onChange,

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defaultOptions,

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}: IAsyncSelectProps) {

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const inputEl = useRef<HTMLInputElement>(null);

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const inputShadowEl = useRef<HTMLDivElement>(null);

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const [isFocused, setFocus] = useState(false);

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const [loadState, setLoadState] = useState<LoadStateType>(

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LoadState.NotLoaded

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);

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const [localValue, setLocalValue] = useState('');

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const [options, setOptions] = useState(defaultOptions);

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const inputSize = `${

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inputShadowEl.current ? inputShadowEl.current.clientWidth + 10 : 2

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}px`;

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useEffect(() => {

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if (loadOptions && loadState === LoadState.NotLoaded) {

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loadOptions('', (result: any) => {

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setOptions(result);

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setLoadState(LoadState.Idle);

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});

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}

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}, [loadOptions, loadState]);

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const renderItems = (items: any[] = [], parentKey?: number) => {

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return items.map((item, index) => {

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if (item.options) {

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return (

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{item.label}

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</MenuGroupHeader>

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<div>{renderItems(item.options, index)}</div>

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</MenuGroup>

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);

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} else {

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const key = `async-select-item-${

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parentKey !== undefined ? `${parentKey}-${index}` : index

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}`;

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return (

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<MenuItem

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key={key}

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id={key}

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selected={value && item.value === value.value}

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onClick={() => {

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onChange(item);

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setFocus(false);

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}}

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{item.label}

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</MenuItem>

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);

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}

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});

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};

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return (

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<ControlContainer

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id="leadin-async-selector"

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focused={isFocused}

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onClick={() => {

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if (isFocused) {

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if (inputEl.current) {

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inputEl.current.blur();

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}

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setFocus(false);

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setLocalValue('');

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} else {

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if (inputEl.current) {

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inputEl.current.focus();

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}

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setFocus(true);

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}

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}}

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{localValue === '' &&

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(!value ? (

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<Placeholder>{placeholder}</Placeholder>

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) : (

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<SingleValue>{value.label}</SingleValue>

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))}

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<Input

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ref={inputEl}

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onFocus={() => {

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setFocus(true);

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}}

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onChange={e => {

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setLocalValue(e.target.value);

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setLoadState(LoadState.Loading);

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loadOptions &&

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loadOptions(e.target.value, (result: any) => {

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setOptions(result);

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setLoadState(LoadState.Idle);

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});

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}}

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value={localValue}

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width={inputSize}

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id="asycn-select-input"

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<InputShadow ref={inputShadowEl}>{localValue}</InputShadow>

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</InputContainer>

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</ValueContainer>

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{loadState === LoadState.Loading && <UISpinner />}

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</IndicatorContainer>

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</ControlContainer>

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{isFocused && (

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<MenuList>{renderItems(options)}</MenuList>

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</MenuContainer>

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)}

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</Container>

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);

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}

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