Sempact AG Eco-Friendly Website Case Study

  • CustomerSempact AG
  • StartDec 1, 2022
  • Duration1 years 6 months
  • PartnerStudio Leeflang
  • RoleProjectmanager, Lead Fullstack-Developer
  • ServicesWeb Development, Web Performance, Web Accessibility, Project Management, Maintenance
  • TechnologiesWeb Components, PHP, Web Performance, Web Accessibility
Project link
Lines of code
Page Weight
Image of the home page of the Sempact AG website
export class QuotesSliderComponent extends BaseComponent {
  constructor() {
  async _connectedCallback() {
  render() {
  startAnimation() {
    const wrapper = this.querySelector('.slider-wrapper');
    const panels = this.querySelectorAll('.slider-wrapper > blockquote');
    const totalPanels = panels.length;
    const containerWidth = this.offsetWidth;
    let currentPanel = 0;
    setInterval(() => {
      currentPanel = (currentPanel + 1) % totalPanels;
      const offset = -currentPanel * containerWidth; = `translateX(${offset}px)`;
    }, 5000);
customElements.define('quote-slider', QuotesSliderComponent);
Image of the dark design of the Sempact AG website

As part of the commitment to Sempact AG, an environmentally conscious website was created, that combines awareness of energy efficiency with the technology of a digital offering. The implementation began with developing custom PHP CMS components that enable robust and flexible content management. These formed the website's core and were designed to reflect the specific requirements of Sempact AG.

A user-friendly, interactive interface was created using state-of-the-art web technologies such as JavaScript and Tailwind. The careful application of web components also resulted in a structurally consistent and modular user interface that promotes the reusability of web elements and the platform's extensibility. Accessibility, a fundamental feature of the project, was ensured through a thoughtful implementation of web accessibility guidelines. This guaranteed that the web application was usable for all user groups without restrictions from the very beginning.

Central to the implementation phase was also the optimization of web performance. Techniques such as lazy loading and adaptive loading were used to reduce loading times and optimize resource consumption, indirectly reducing the platform's ecological footprint. The focus on web sustainability reinforced Sempact AG's role as a pioneer in the sustainable industry, with the web platform itself serving as an example of the use of environmentally friendly technologies.


The decision to forgo third-party integrations improved performance and reliability and enhanced data security and sovereignty. Instead, custom API structures were created to enable seamless integration and secure data exchange with other systems. A “no-code” approach was followed in backend development, allowing web administrators flexibility without requiring in-depth programming knowledge. The successful realization of the web platform results from a detail-oriented implementation phase that convincingly combines technology and sustainability, reflecting the values of Sempact AG in its digital presence.

Web Components
Web Performance
Web Accessibility
Web Sustainability


  • Largest element (LCP) get’s rendered in under 1 second
    969 ms

  • An 'A' rating on


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