将相对URL路径解析为其绝对路径

const relativeUrl = '/path/to/resource.jpg';
const absoluteUrl = new URL(relativeUrl, window.location.href).href;

const relativeUrl = '/path/to/resource.jpg';
const a = document.createElement('a');
a.href = relativeUrl;
const absoluteUrl = a.href;

const url = require('url');
const relativeUrl = '/path/to/resource.jpg';
const baseUrl = 'https://example.com';
const absoluteUrl = url.resolve(baseUrl, relativeUrl);