Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows:

"In the example file, we have a div element classed as chart-example and with the ID chart."

A block of code is set as follows:

divItems.enter()
    .append('div')
    .attr('class', 'data-item');

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

chart.onClick = function(d) {
    // ...

    // Invoke the user callback.
    onColorChange(color);
};

Any command-line input or output is written as follows:

$ grunt vows
Running "vows:all" (vows) task
(additional output not shown)
Done, without errors.

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text as follows:

"By clicking on Create a Project, we can access the map editor, where we can customize the colors of land, buildings, and other features; select the base layer (street, terrain, or satellite) and select the primary language for the features and locations in the map."