Standard Globals
Embedded JavaScript defines a set of global functions, constructors and variables for every JavaScript program.
The ESP run-time defines the following JavaScript variables for use inside an ESP page.
EJS defines the following object constructors.
EJS defines the following global functions:
JavaScript Variables
The ESP run-time defines the following JavaScript variables for use inside an ESP page.| Variable Name |
Description |
| false |
False boolean value |
| global |
Global variables for this request |
| Infinity |
Floating point number set to Infinity |
| local |
Local variables for the outermost JavaScript block in the ESP web page |
| Nan |
Floating point number set to "Not a Number" |
| null |
Defined variable set to Null |
| true |
True boolean value |
| undefined |
Variable has no value and is set to the Undefined Value |
JavaScript Constructors
EJS defines the following object constructors.| Script Name |
Syntax |
Examples |
Description |
| Array |
Array(elt1, elt2, ...) Array(size) |
var o = new Array("item 1", "item 2"); var o = new Array(256); |
Create an array and insert elements. The second form creates an array with elements named "0", "1", "2", and so forth up to the nominated size. |
| Object |
Object(); |
var o = new Object(); |
Create a new object. |
JavaScript Functions
EJS defines the following global functions:| Script Name |
Syntax |
Examples |
Description |
| assert |
assert(condition) |
||
| eval |
eval(script); |
eval("var " + x + " = " + string); | Evaluate the given script. |
| exit |
exit(status) |
exit(0); |
Immediately terminate the current script or ESP. |
| include |
include(filename); |
include("myLib.js"); |
Server side inclusion of a JavaScript library. The nominated file is read and parsed inline when the page is compiled by AppWeb. |
| print |
print(string, ...); |
print("Hello World\n"); | Print the given strings to the web server standard output. |
| println |
print(string, ...); |
print("Hello World"); | Print the given strings to the web server standard output followed by a new line. |
| printVars |
print(v, ...); |
print(obj1, obj2, obj3); |
Print the string representation of the given objects to the web server standard output. Objects are expanded and all properties are printed. Great for debugging. |
| refCount |
refCount(o); |
var count = refCount(obj); |
Return the number of references to this object. |
| trace |
trace(message); trace(level, message); |
trace(2, "Message at level 2"); |
Write a message to the AppWeb log. |