ES6 fetch #api with headers and body

fetchAnki.js

fetch(`http://localhost:${env.ankiPort || 8765}`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({ action: 'addNote', version: 6, params }),
    }).catch(error => {
      pluginContext.console.log('error', 'failed adding to anki', { error, errorString: String(error) });
    })