PlatformResourceLoader

In plain words: To use external JavaScript libraries (like Chart.js, D3.js, or Moment.js) in Salesforce LWC, you cannot just link to an external CDN or rely on standard NPM imports. Instead, you must upload the library as a Static Resource and load it securely using the lightning/platformResourceLoader module. Importing third-party libraries greatly expands what you can build with Lightning Web Components. Instead of reinventing the wheel for complex date formatting, charts, or animations, you can leverage existing open-source libraries. In this guide, we will walk through the official, secure way to implement third-party JS libraries inside Salesforce.