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node_modules/lit-html/development/directive.d.ts

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+/**
+ * @license
+ * Copyright 2017 Google LLC
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+import { Disconnectable, Part } from './lit-html.js';
+export { AttributePart, BooleanAttributePart, ChildPart, ElementPart, EventPart, Part, PropertyPart, } from './lit-html.js';
+export interface DirectiveClass {
+    new (part: PartInfo): Directive;
+}
+/**
+ * This utility type extracts the signature of a directive class's render()
+ * method so we can use it for the type of the generated directive function.
+ */
+export declare type DirectiveParameters<C extends Directive> = Parameters<C['render']>;
+/**
+ * A generated directive function doesn't evaluate the directive, but just
+ * returns a DirectiveResult object that captures the arguments.
+ */
+export interface DirectiveResult<C extends DirectiveClass = DirectiveClass> {
+}
+export declare const PartType: {
+    readonly ATTRIBUTE: 1;
+    readonly CHILD: 2;
+    readonly PROPERTY: 3;
+    readonly BOOLEAN_ATTRIBUTE: 4;
+    readonly EVENT: 5;
+    readonly ELEMENT: 6;
+};
+export declare type PartType = (typeof PartType)[keyof typeof PartType];
+export interface ChildPartInfo {
+    readonly type: typeof PartType.CHILD;
+}
+export interface AttributePartInfo {
+    readonly type: typeof PartType.ATTRIBUTE | typeof PartType.PROPERTY | typeof PartType.BOOLEAN_ATTRIBUTE | typeof PartType.EVENT;
+    readonly strings?: ReadonlyArray<string>;
+    readonly name: string;
+    readonly tagName: string;
+}
+export interface ElementPartInfo {
+    readonly type: typeof PartType.ELEMENT;
+}
+/**
+ * Information about the part a directive is bound to.
+ *
+ * This is useful for checking that a directive is attached to a valid part,
+ * such as with directive that can only be used on attribute bindings.
+ */
+export declare type PartInfo = ChildPartInfo | AttributePartInfo | ElementPartInfo;
+/**
+ * Creates a user-facing directive function from a Directive class. This
+ * function has the same parameters as the directive's render() method.
+ */
+export declare const directive: <C extends DirectiveClass>(c: C) => (...values: Parameters<InstanceType<C>["render"]>) => DirectiveResult<C>;
+/**
+ * Base class for creating custom directives. Users should extend this class,
+ * implement `render` and/or `update`, and then pass their subclass to
+ * `directive`.
+ */
+export declare abstract class Directive implements Disconnectable {
+    constructor(_partInfo: PartInfo);
+    get _$isConnected(): boolean;
+    abstract render(...props: Array<unknown>): unknown;
+    update(_part: Part, props: Array<unknown>): unknown;
+}
+//# sourceMappingURL=directive.d.ts.map