Microsoft JScript Features

JScript / JavaScript Features		Tutorial. The oxherders guide is more compact. VisiBone^ has more examples.
Contents Online IDE Scripting Runtime objects Document Object Model	non-ecma features are presented with a grey background Also: HTML Scripting DOM Glossary	Extensions that may be added by the user are presented with a light yellow background	Items related to internet browser scripting and document object models are presented with a light blue background

Control flow

Assignments / Declarations

for ( init ; test ; inc ) stmt
for (var in [obj | ary]) stmt
if (cond ) stmt [else stmt] (cond ? stmt : stmt )
return [exp]
while ( exp ) stmt
&&, ||, break, continue

do stmt while ( exp )
label : stmt
switch ( exp ) {
case label : stmt ; [ case label : stmt ; ...]
[break;]
default : stmt ; }

[static] var | let | const name [ = exp ];
Assign (=) eg: variabl e = exp;
Compound Assign (Operator=) eg: variable += exp;
variable = new ObjectType [(arguments)]
variable = new function ( "parameters", "stmt" )
this.property
with ( obj ) stmt

Arrays

Constants/Literals

new Array([size|elem[,elem]]) ary.length
ary.join(seperator) str.split(regExp)
ary.reverse()
ary.sort([sortFunc]) ary.map([mapFunc])
for...in
[a, b, c] = ary

ary1.concat(ary2) ary1.slice(start,[end]) ary1.splice(start[,length][,elements])
VBArray: toArray, getItem,
dimensions, lbound, ubound
Enumerator: atEnd, item, moveFirst, moveNext

array.At(index)
array.Max(args)

Boolean:
true: object, non-empty string, non zero
false: 0, null, NaN, undefined, empty string
Numbers: MAX_VALUE, MIN_VALUE, NaN, NEGATIVE_INFINITY, POSITIVE_INFINITY,Infinity
Math.PI,Math.E

Numbers

Math object: abs, ceil, floor, max, min, random, round, acos, asin, atan, atan2, cos, exp, log, pow, sin, sqrt, tan, E, LN2, LN10, LOG2E, LOG10E, PI, SQRT1_2, SQRT2

parseInt(numstr [, radix]) parseFloat(numstr)
isFinite(num)
isNaN(num)

formatNumber | formatPercent | formatCurrency (num, decs, zeros, parens, commas)

Object Creation www.crockford.com/javascript/private.html

Document Object

new { Array | Boolean | Date | Function | Global | Math | Number | Object | String } [(arguments)]
obj.constructor obj.prototype
obj.toString() obj.valueOf() obj.typeOf(exp) obj.this
obj_copy = JSON.parse(JSON.stringify(obj_to_copy)) ^{1
2}

elementFromPoint(x,y)
getElementById(sIDValue)
getElementsByName(sNameValue)
getElementsByTagName(sTagName)

getElementsByClass(searchClass, node, tag)

Strings see also User defined functions

Regular Expressions Syntax

String object str.length
str.substr(start [, length ]) str.substring(start, end)
str.charAt(idx) str.charCodeAt(idx) String.fromCharCode(code [, code])
str.indexOf(substr, start) str.lastIndexOf(substr, start)
str.split(regExp) ary.join(seperator)
toLowerCase, toUpperCase
escape, unescape

concat, slice
match, replace, search

anchor, big, blink, bold, fixed, fontcolor, fontsize, italics, link, small, strike, sub, sup

formatNumber, formatPercent, formatCurrency, formatDateTime
LTrim, RTrim, Trim, Len, Left, Right, Mid, inStr

RegExp
index, input ($_), lastIndex, lastMatch ($&), lastParen ($+), leftContext ($'), multiline ($*), rightContext ($'), $1...$9
Regular Expression
global, ignorecase, lastIndex, source
compile(pattern), exec(str), test(str)

Operators

Addition (+), Subtraction (-)
Modulus arithmetic (%)
Multiplication (*), Division (/)
Negation (-)
Bitwise And (&), Or (|), Not (~), Xor (^)
Bitwise Left Shift (<<), Shift Right (>>)
Unsigned Shift Right (>>>)
Decrement (--), Increment (++)

Equality (==), Inequality (!=)
Less Than (<), Less Than or Equal To (<=)
Greater Than (>), Greater Than or Equal To (>=)
Logical And(&&), Or (||), Not (!)
Conditional (?:)
Comma (,)
delete, typeOf, void

Dates and Time

Date object: toGMTString, toLocaleString, toUTCString, parse, UTC, getDay, getUTCDay,
getDate, getFullYear, getMonth, getYear, getUTCDate, getUTCFullYear, getUTCMonth,
setDate, setFullYear, setMonth, setYear, setUTCDate, setUTCFullYear, setUTCMonth,

addToDate(date,hours,minutes)

getHours, getMilliseconds, getMinutes, getSeconds, getTime, getUTCHours, getUTCMilliseconds, getUTCMinutes, getUTCSeconds, getTimezoneOffset,
setHours, setMilliseconds, setMinutes, setSeconds, setTime, setUTCHours, setUTCMilliseconds, setUTCMinutes, setUTCSeconds,

timeoutID=setTimeout(action,msec)

Function Creation ^

Global Functions

function name( arguments ) stmt
var name = function ( arguments ) stmt
var name = new Function ( arguments, stmt )
var name = ( args ) => expr
var name = ( args ) => { stmt }
return, length, prototype, constructor

caller

Global
escape, unescape
eval
isFinite, isNaN
parseInt, parseFloat

Comments

Input / Output 3D^

/*...*/ or //

event: .clientX,.clientY,
alert, document.write, window.status
ajax

See:

/techref/language/html/ajax.htm AJAX: Asynchronous JavaScript And XHTML +
The Zen of JavaScript

See also:

https://codepen.io/ Better than JSFiddle+
https://jsbin.com/kucutojono/edit?js,console,output Calling a function in (0, function()) form changes 'this' from local to global. Useful because function.call(windows) as a way to control 'this' requires the name of the global object. And depending on the environment, it might not be windows. E.g. Javascript running on a server, node, embedded, whatever.
```
var x = "xGlobalFromWindow";
var obj = {
  x: "xLocalFromObject",
  getMyX: function() {
    return this.x;
  }
}
console.log("(0, obj.getMyX)(): " + (0, obj.getMyX)() );
console.log("obj.getMyX(): " + obj.getMyX() );
```
http://eloquentjavascript.net/ comprehensive introduction to the JavaScript programming language
https://www.sitepoint.com/demystifying-javascript-closures-callbacks-iifes/
http://javascript-reference.info/ A Quick Reference with lots of examples.
http://sweatte.wordpress.com/javascript-optimization/
http://www.bristle.com/Tips/JavaScript.htm

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