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Preact native <select> implementation with search feature
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| /** | |
| * <MySelector | |
| * options={exampleArr} | |
| * printBy="name" | |
| * selected={this.selectedOpt} | |
| * onOptionSelected={(opt) => | |
| * this.mySelectorValueChange(opt)} | |
| * /> | |
| */ | |
| import { h, Component } from "preact"; | |
| import { stylesheet } from "stylesheet-decorator"; | |
| export interface MySelectorAttibutes { | |
| options: any[]; | |
| selected: any; | |
| printBy: string; | |
| onOptionSelected: (any) => void; | |
| } | |
| export interface MySelectorState { | |
| visible: boolean; | |
| value: string; | |
| } | |
| // <MySelector onOptionSelected={updateProp} options={arr} printBy="name" trackBy="id"/> | |
| export class MySelector extends Component<MySelectorAttibutes, MySelectorState> { | |
| public state = { visible: false, value: "" }; | |
| private styleVisible = { display: "block" }; | |
| private styleHidden = { display: "none" }; | |
| private clickHandler = (e) => this.onClickOutside(e); | |
| public componentDidMount(): void { | |
| this.props.selected && this.setState(() => ({ value: this.props.selected[this.props.printBy] })); | |
| } | |
| private onClickOutside(e: Event): void { | |
| !this.base.contains(e.target as Node) && this.closeTooltip(); | |
| } | |
| private closeTooltip(): void { | |
| this.setState(() => ({ visible: false })); | |
| window.removeEventListener("click", this.clickHandler); | |
| this.checkMatch(); | |
| } | |
| private checkMatch(): void { | |
| const match = this.props.options.find((opt) => this.getMatcher(opt)); | |
| !!match ? this.selectOption(match) : this.setState(() => ({ value: "" })); | |
| } | |
| private onFocusHandler(e: Event): void { | |
| (e.target as any).select(); | |
| this.setState(() => ({ visible: true })); | |
| window.addEventListener("click", this.clickHandler); | |
| } | |
| private filterOptions(e: Event): void { | |
| const { value } = e.target as any; | |
| this.setState(() => ({ value })); | |
| } | |
| private getFilter(opt: any): boolean { | |
| return opt[this.props.printBy].match(new RegExp(this.state.value, "i")); | |
| } | |
| private getMatcher(opt: any): boolean { | |
| return opt[this.props.printBy].match(new RegExp(`^${this.state.value}$`, "i")); | |
| } | |
| private selectOption(opt: any): void { | |
| this.props.onOptionSelected.call(null, opt); | |
| } | |
| private explicitSelection(opt: any): void { | |
| this.setState(() => ({ value: opt[this.props.printBy] })); | |
| this.closeTooltip(); | |
| } | |
| @stylesheet(` | |
| :host { | |
| background-color: buttonface; | |
| display: inline-block; | |
| align-items: center; | |
| border-radius: 0px; | |
| border-color: lightgrey; | |
| } | |
| [data-selector-option]:hover { | |
| cursor: pointer; | |
| color: white; | |
| background-color: grey; | |
| } | |
| `) | |
| public render(): JSX.Element { | |
| return ( | |
| <div data-selector-container> | |
| <div data-selector-display> | |
| <input onFocus={(e) => this.onFocusHandler(e)} onInput={(e) => this.filterOptions(e)} value={this.state.value}/> | |
| </div> | |
| <div data-selector-tooltip style={this.state.visible ? this.styleVisible : this.styleHidden}> | |
| {this.props.options | |
| .filter((opt) => !this.state.value || this.getFilter(opt)) | |
| .map((opt) => ( | |
| <div data-selector-option onClick={() => this.explicitSelection(opt)}> | |
| <span>{opt[this.props.printBy]}</span> | |
| </div> | |
| ))} | |
| </div> | |
| </div> | |
| ) | |
| } | |
| } |
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