OneNote Extension-Main API

function getPagesInSection() {
  OneNote.run((context) => {
    // 1. Access API via context.application, access pages details from getActiveSection()
    var pages = context.application.getActiveSection().pages;

    // 2. load the page id & title, but will NOT execute immediately 
    pages.load('id,title');

    // 3. Async function, execute the events in the queue
    return context.sync()
      .then(() => {

        // 4 Access the id & title
        for (let page of pages.items) {
          var pageId = page.id;
          var pageTitle = page.title;
          console.log(pageTitle + ': ' + pageId);
        }
      })
      .catch((error) => {
        console.log("Error: " + error);
        if (error instanceof OfficeExtension.Error) {
          console.log("Debug info: " + JSON.stringify(error.debugInfo));
        }
      });
  });
}

function getSelectedText() {
  // Access the mouse selected text
  Office.context.document.getSelectedDataAsync(
    Office.CoercionType.Text, {
      valueFormat: "unformatted"
    },
    function(asyncResult) {
      var error = asyncResult.error;
      if (asyncResult.status === Office.AsyncResultStatus.Failed) {
        console.log(error.message);
      } else console.log(asyncResult.value);
    });
}