@idxdb/promised/dist/src/component/key-cursor.js

@idxdb/promised wraps the IndexedDB API. It allows you to easily store and retrieve data in an indexed db database using async/await syntax, making it easier to integrate with your existing codebase.

import { requestResolver } from '../shared/request-resolver.js';
export class KeyCursor {
    ctx;
    _cursor;
    _cursorPromise;
    constructor(ctx) {
        this.ctx = ctx;
        this._cursorPromise = requestResolver(ctx.request).then((cursor) => {
            this._cursor = cursor;
            return cursor;
        });
    }
    get request() {
        return this._cursor?.request || this.ctx.request;
    }
    get key() {
        return this._cursor.key;
    }
    get primaryKey() {
        return this._cursor.primaryKey;
    }
    get direction() {
        return this.ctx.direction;
    }
    get source() {
        return this.ctx.source;
    }
    async end() {
        return this._cursorPromise.then((cursor) => !cursor);
    }
    continue(key) {
        this.stepUp().continue(key);
    }
    advance(count) {
        this.stepUp().advance(count);
    }
    continuePrimaryKey(key, primaryKey) {
        this.stepUp().continuePrimaryKey(key, primaryKey);
    }
    stepUp() {
        this._cursorPromise = requestResolver(this.ctx.request).then((cursor) => {
            this._cursor = cursor;
            return cursor;
        });
        const cursor = this._cursor;
        this._cursor = null;
        return cursor;
    }
}