lazy-loading-image-render/dist/processImage.js

Lazy loading image render with blur effect for Next.js

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
    return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (g && (g = 0, op[0] && (_ = 0)), _) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var sharp_1 = __importDefault(require("sharp"));
function processImage(_a) {
    return __awaiter(this, arguments, void 0, function (_b) {
        var placeholder, optimized;
        var src = _b.src, _c = _b.width, width = _c === void 0 ? 800 : _c, _d = _b.height, height = _d === void 0 ? 800 : _d, _e = _b.quality, quality = _e === void 0 ? 80 : _e;
        return __generator(this, function (_f) {
            switch (_f.label) {
                case 0: return [4 /*yield*/, (0, sharp_1.default)(src)
                        .resize(20, 20)
                        .blur(10)
                        .webp({ quality: 20 })
                        .toBuffer()];
                case 1:
                    placeholder = _f.sent();
                    return [4 /*yield*/, (0, sharp_1.default)(src)
                            .resize(width, height, {
                            fit: 'cover',
                            position: 'center'
                        })
                            .webp({ quality: quality })
                            .toBuffer()];
                case 2:
                    optimized = _f.sent();
                    return [2 /*return*/, {
                            placeholder: "data:image/webp;base64,".concat(placeholder.toString('base64')),
                            optimized: "data:image/webp;base64,".concat(optimized.toString('base64'))
                        }];
            }
        });
    });
}
exports.default = processImage;