Class RichLink

var doc = DocumentApp.getActiveDocument();
var documentTab = doc.getActiveTab().asDocumentTab();
var body = documentTab.getBody();

// Append a styled paragraph.
var par = body.appendParagraph('A bold, italicized paragraph.');
par.setBold(true);
par.setItalic(true);

// Retrieve the paragraph's attributes.
var atts = par.getAttributes();

// Log the paragraph attributes.
for (var att in atts) {
  Logger.log(att + ":" + atts[att]);
}

var doc = DocumentApp.getActiveDocument();
var documentTab = doc.getActiveTab().asDocumentTab();
var body = documentTab.getBody();

// Obtain the first element in the active tab's body.

var firstChild = body.getChild(0);

// Use getType() to determine the element's type.
if (firstChild.getType() == DocumentApp.ElementType.PARAGRAPH) {
  Logger.log('The first element is a paragraph.');
} else {
  Logger.log('The first element is not a paragraph.');
}

var doc = DocumentApp.getActiveDocument();
var documentTab = doc.getActiveTab().asDocumentTab();
var body = documentTab.getBody();

// Example 1: Merge paragraphs
// Append two paragraphs to the document's active tab.
var par1 = body.appendParagraph('Paragraph 1.');
var par2 = body.appendParagraph('Paragraph 2.');
// Merge the newly added paragraphs into a single paragraph.
par2.merge();

// Example 2: Merge table cells
// Create a two-dimensional array containing the table's cell contents.
var cells = [
['Row 1, Cell 1', 'Row 1, Cell 2'],
['Row 2, Cell 1', 'Row 2, Cell 2']
];
// Build a table from the array.
var table = body.appendTable(cells);
// Get the first row in the table.
 var row = table.getRow(0);
// Get the two cells in this row.
var cell1 = row.getCell(0);
var cell2 = row.getCell(1);
// Merge the current cell into its preceding sibling element.
var merged = cell2.merge();

var doc = DocumentApp.getActiveDocument();
var documentTab = doc.getActiveTab().asDocumentTab()
var body = documentTab.getBody();

// Remove all images in the active tab's body.
var imgs = body.getImages();
for (var i = 0; i < imgs.length; i++) {
  imgs[i].removeFromParent();
}

var doc = DocumentApp.getActiveDocument();
var documentTab = doc.getActiveTab().asDocumentTab();
var body = documentTab.getBody();

// Define a custom paragraph style.
var style = {};
style[DocumentApp.Attribute.HORIZONTAL_ALIGNMENT] =
    DocumentApp.HorizontalAlignment.RIGHT;
style[DocumentApp.Attribute.FONT_FAMILY] = 'Calibri';
style[DocumentApp.Attribute.FONT_SIZE] = 18;
style[DocumentApp.Attribute.BOLD] = true;

// Append a plain paragraph.
var par = body.appendParagraph('A paragraph with custom style.');

// Apply the custom style.
par.setAttributes(style);