Use 3rd Party Resource in LWC

import { loadStyle, loadScript } from 'lightning/platformResourceLoader';

// static resource

import myResourceName from '@salesforce/resourceUrl/myResourceName';

initianlized = false;

Use in renderedCallback() {

    if (this.initianlized) {

        return;

    }

    this.initianlized = true;

    Promise.all([

        loadStyle(this, myResourceName + '/css/myResourceName.css'),

        loadScript(this, myResourceName + '/js/myResourceName.js'),

    ]).then(() => {

        // do some thing

    });

}

myResourceName zip

/js/myResourceName.js

/css/myResourceName.css