2.6 KiB
Global Objects
These objects are available in all modules. Some of these objects aren't actually in the global scope but in the module scope - this will be noted.
global
The global namespace object.
In browsers, the top-level scope is the global scope. That means that in
browsers if you're in the global scope var something will define a global
variable. In Node this is different. The top-level scope is not the global
scope; var something inside a Node module will be local to that module.
process
The process object. See the process object section.
console
Used to print to stdout and stderr. See the stdio section.
Buffer
Used to handle binary data. See the buffers section.
require()
To require modules. See the Modules section.
require isn't actually a global but rather local to each module.
require.resolve()
Use the internal require() machinery to look up the location of a module,
but rather than loading the module, just return the resolved filename.
require.cache
Modules are cached in this object when they are required. By deleting a key
value from this object, the next require will reload the module.
__filename
The filename of the code being executed. This is the resolved absolute path of this code file. For a main program this is not necessarily the same filename used in the command line. The value inside a module is the path to that module file.
Example: running node example.js from /Users/mjr
console.log(__filename);
// /Users/mjr/example.js
__filename isn't actually a global but rather local to each module.
__dirname
The name of the directory that the currently executing script resides in.
Example: running node example.js from /Users/mjr
console.log(__dirname);
// /Users/mjr
__dirname isn't actually a global but rather local to each module.
module
A reference to the current module. In particular
module.exports is the same as the exports object. See src/node.js
for more information.
module isn't actually a global but rather local to each module.
exports
An object which is shared between all instances of the current module and
made accessible through require().
exports is the same as the module.exports object. See src/node.js
for more information.
exports isn't actually a global but rather local to each module.
setTimeout(cb, ms)
clearTimeout(t)
setInterval(cb, ms)
clearInterval(t)
The timer functions are global variables. See the timers section.