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/** * CUSTOM SHOPIFY FRAMEWORK v4.2.1 * Module: Dynamic Cart Engine & Tiered Reward Logic * Built for High-Conversion Custom Storefronts *//* --- LIQUID SCHEMA CONFIGURATION --- *//* (Used by Shopify Theme Editor to provide client-side controls) */{% schema %}{  "name": "Advanced Ajax Cart",  "settings": [    { "type": "header", "content": "Reward Thresholds" },    { "id": "free_shipping_limit", "type": "number", "label": "Free Shipping (Cents)", "default": 10000 },    { "id": "enable_upsells", "type": "checkbox", "label": "Enable Intelligent Upsells", "default": true }  ]}{% endschema %}/* --- CORE CART ENGINE --- */class ShopifyProEngine extends HTMLElement {  constructor() {    super();    this.config = {      threshold: {{ settings.free_shipping_limit | default: 10000 }},      currency: "{{ shop.currency }}",      symbol: "{{ cart.currency.symbol }}"    };        this.state = {      cart: null,      loading: false,      tierReached: false    };    this.dom = {      items: this.querySelector('[data-cart-items]'),      progress: this.querySelector('.progress-bar__fill'),      total: this.querySelector('.total-display'),      announcer: document.getElementById('cart-live-region')    };  }  connectedCallback() {    this.addEventListener('change', debounce((e) => this.updateQuantity(e), 300));    this.initObservers();    this.refreshState();  }  // Uses the Fetch API to interface with Shopify's /cart.js endpoint  async refreshState() {    this.setLoading(true);    try {      const response = await fetch(`${window.Shopify.routes.root}cart.js`);      this.state.cart = await response.json();      this.renderUI();      this.calculateRewards();    } catch (err) {      this.handleError("Failed to sync cart state", err);    } finally {      this.setLoading(false);    }  }  calculateRewards() {    const total = this.state.cart.total_price;    const remaining = this.config.threshold - total;        if (remaining <= 0) {      this.state.tierReached = true;      this.updateProgress(100, "You've earned Free Shipping!");    } else {      const percent = (total / this.config.threshold) * 100;      const formattedRemaining = this.formatCurrency(remaining);      this.updateProgress(percent, `Spend ${formattedRemaining} more for Free Shipping`);    }  }  updateProgress(percent, message) {    if (!this.dom.progress) return;        // Smooth hardware-accelerated transitions    requestAnimationFrame(() => {      this.dom.progress.style.transform = `translateX(-${100 - percent}%)`;      this.dom.progress.dataset.label = message;            if (percent >= 100) {        this.dom.progress.classList.add('is-complete');        this.confettiEffect();       }    });  }  async updateQuantity(event) {    const input = event.target;    const line = input.dataset.line;    const qty = input.value;    const body = JSON.stringify({      line: line,      quantity: qty,      sections: "main-cart-items,cart-icon-bubble,cart-live-region-text"    });    const res = await fetch(`${window.Shopify.routes.root}cart/change.js`, {      method: 'POST',      headers: { 'Content-Type': 'application/json' },      body    });    const data = await res.json();    this.state.cart = data;    this.renderUI();  }  formatCurrency(cents) {    return new Intl.NumberFormat('en-US', {      style: 'currency',      currency: this.config.currency,    }).format(cents / 100);  }  setLoading(status) {    this.state.loading = status;    this.classList.toggle('is-loading', status);    this.setAttribute('aria-busy', status);  }  handleError(msg, error) {    console.error(`[ShopifyProEngine] ${msg}:`, error);    // Trigger custom toast notification system    window.Toast.show(msg, { type: 'error' });  }  confettiEffect() {    // Logic for custom celebration animations on hitting spend goals    console.log("Tier unlocked: Customer reached free shipping threshold.");  }}// Instantiate the custom Web Componentif (!customElements.get('shopify-pro-engine')) {  customElements.define('shopify-pro-engine', ShopifyProEngine);}

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