Node.js syntax is very similar to JavaScript. Specific similarities include: variable declaration, data types, conditional judgments, loops, functions, objects, and arrays. But Node.js also has features that are different from JavaScript, such as module system, global objects, asynchronous I/O, package managers, etc.
What is the syntax of Node.js similar to?
The syntax of Node.js is very similar to JavaScript because it is a platform based on the JavaScript runtime.
Specific similarities
-
Variable declaration: Use
let
,const
andvar
Declare variables. - Data type: Supports basic data types (such as numbers, strings, Boolean values) and complex data types (such as arrays, objects).
-
Conditional judgment: Use the
if-else
statement to perform conditional judgment. -
Looping: Use the
for
,while
anddo-while
statements to loop. -
Function: Use the
function
keyword to declare a function, you can usearrow function
to simplify function writing. -
Object: Use curly brackets
{}
to define objects, which can include key-value pairs and other objects. -
Array: Use square brackets
[]
to define an array, which can store any data type.
Features that differ from JavaScript
Although Node.js syntax is similar to JavaScript, there are some key differences:
- Module system: Node.js uses a module system to organize and load code, while JavaScript does not have a built-in module system.
-
Global Object: Node.js has a global
process
object which provides information about the current Node.js process. - Asynchronous I/O: Node.js uses a non-blocking I/O model, allowing asynchronous operations to be performed without blocking the main thread.
- Package Manager: Node.js uses npm (Node Package Manager) to install and manage third-party packages, while JavaScript does not have an official package manager.
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