Here to review the front-end JS data type:
Data type in front-end JS:
1. Basic/native/value type
String, number, Boolean, null, undefined
2. Reference/Object Type
Es object type: String, number, Boolean, Math, Date, RegExp, Object, Function, Error,array,global object.
BOM Object type: Window, document, screen, history, location, Navigator, event ...
Dom Object type: Node, Element, Attr ....
User-defined object type: {}
Data types in back-end node. js
1. Basic/native/value type
String, number, Boolean, null, undefined;
2. Reference/Object type
Es object type: String, number, Boolean, Math, Date, RegExp, Object, Function, Error,array,global object.
node. JS Special object: There are currently hundreds of ....
User-defined object type: {}
Small example:
1 for (var i=0; i<10; i++) {2 console.log (i); 3 }4 console.log (' entire node. js script File Execution complete ');
2, 99 multiplication table
node. JS Object Data type