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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 | 73x 112x 112x 112x 112x 112x 112x 112x 112x 112x 112x 112x 73x 112x 112x 112x 56x 56x 56x 56x 56x 112x 56x 112x 112x 112x 112x | import { LitElement, html, unsafeCSS } from "lit"
import { customElement, property, query, state } from "lit/decorators.js"
import { classMap } from "lit/directives/class-map.js"
import style from "./style.scss?inline"
/**
* Available HTML input types supported by {@link VgInput}.
*/
export type InputType = "text" | "email" | "password" | "search" | "number" | "tel"
/**
* Detail payload emitted alongside the {@link VgInput} change event.
*/
export interface InputChangeDetail {
/**
* Current value of the input field.
*/
readonly value: string
/**
* Native event that triggered the update.
*/
readonly originalEvent: InputEvent
}
let idCounter = 0
const nextId = () => `vg-input-${++idCounter}`
/**
* Theme-aware text input supporting helper and error messaging.
*
* @tag vg-input
* @tagname vg-input
* @summary The Input component, used for text input with validation support.
*
* @slot prefix - Optional content rendered before the native input (e.g. icons)
* @slot suffix - Optional content rendered after the native input (e.g. actions)
*
* @csspart input - Allows you to style the input element
* @csspart label - Allows you to style the label element
*
* @fires {InputChangeDetail} vg-change - Fired whenever the value changes via user input
*
*/
@customElement("vg-input")
export class VgInput extends LitElement {
static styles = unsafeCSS(style)
/**
* Input label rendered above the control.
*/
@property({ type: String })
public label: string | null = null
/**
* Provides additional guidance displayed beneath the control.
*/
@property({ type: String, attribute: "helper-text" })
public helperText: string | null = null
/**
* Error message to display. When present the input is marked as invalid.
*/
@property({ type: String })
public error: string | null = null
/**
* Placeholder text forwarded to the native input element.
*/
@property({ type: String })
public placeholder: string | null = null
/**
* Current value of the input. Setting the property updates the native control.
*/
@property({ type: String })
public value = ""
/**
* Name attribute forwarded to the native input.
*/
@property({ type: String })
public name: string | null = null
/**
* Native input type.
*/
@property({ type: String })
public type: InputType = "text"
/**
* Disables user interaction with the input control.
*/
@property({ type: Boolean, reflect: true })
public disabled = false
/**
* Marks the input as required for form validation.
*/
@property({ type: Boolean, reflect: true })
public required = false
@query("input")
private inputElement!: HTMLInputElement
@state()
private hasPrefixContent = false
@state()
private hasSuffixContent = false
private readonly inputId = nextId()
protected firstUpdated() {
this.updateSlotState("prefix")
this.updateSlotState("suffix")
}
protected updated() {
Iif (this.inputElement && this.inputElement.value !== this.value) {
this.inputElement.value = this.value
}
}
/**
* @inheritdoc
*/
protected render() {
const controlClasses = {
control: true,
"has-prefix": this.hasPrefixContent,
"has-suffix": this.hasSuffixContent,
"has-error": !!this.error,
}
const describedBy = [
this.helperText ? `${this.inputId}-helper` : null,
this.error ? `${this.inputId}-error` : null,
].filter((value): value is string => value !== null)
return html`
<label class="field" for=${this.inputId}>
${this.label ? html`<span class="field__label">${this.label}</span>` : null}
<div class=${classMap(controlClasses)}>
<slot name="prefix" @slotchange=${this.onSlotChange}></slot>
<input
id=${this.inputId}
.value=${this.value}
type=${this.type}
name=${this.name ?? ""}
placeholder=${this.placeholder ?? ""}
?disabled=${this.disabled}
?required=${this.required}
aria-invalid=${this.error ? "true" : "false"}
aria-describedby=${describedBy.join(" ")}
@input=${this.onInput}
/>
<slot name="suffix" @slotchange=${this.onSlotChange}></slot>
</div>
${this.helperText ? html`<p id=${`${this.inputId}-helper`} class="field__helper">${this.helperText}</p>` : null}
${this.error ? html`<p id=${`${this.inputId}-error`} class="field__error">${this.error}</p>` : null}
</label>
`
}
private onInput(event: InputEvent) {
Iif (I!this.inputElement) {
return
}
this.value = this.inputElement.value
this.dispatchEvent(new CustomEvent<InputChangeDetail>('vg-change', {
detail: {
value: this.value,
originalEvent: event,
},
// bubbles: true,
composed: true,
}))
}
private onSlotChange(event: Event) {
const slot = event.target as HTMLSlotElement
this.updateSlotState(slot.name as "prefix" | "suffix")
}
private updateSlotState(name: "prefix" | "suffix") {
const slot = this.shadowRoot?.querySelector(`slot[name="${name}"]`) as HTMLSlotElement | null
const hasContent = (slot?.assignedNodes({ flatten: true }).length ?? 0) > 0
Iif (name === "prefix" && this.hasPrefixContent !== hasContent) {
this.hasPrefixContent = hasContent
}
Iif (name === "suffix" && this.hasSuffixContent !== hasContent) {
this.hasSuffixContent = hasContent
}
}
}
declare global {
interface HTMLElementTagNameMap {
"vg-input": VgInput
}
}
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