Javascript.md

####comment // and /* */

Noscript element

<noscript>
<p>This page requires a JavaScript-enabled browser.</p></noscript>

variable declaration

var date;
date = 56;

or
var date = 56;

condition

if ( condition )
{        
   code;
}
else
{        
   code;
}

loops

just like C/C++ ; all r same (while ,do-while , for loop ) and usual break , continue .

Equal sign

double equal sign ( == ) check equality triple equal sign ( === ) check strict equality // counterpart of triple equal ( !== )

Best practice

Define your function before you call them :)

Array

var bla = [] ;

array method

bla.join() ; 
bla.reverse() ; 
bla.sort()```
  
###### 5+"5" = "55" 5 automatically converted to string !!
###### js converntion 
 variable name can me camelcase like var whatIsGoingOnGuys; but not this what_is_going .....
#### Convert
```javascript
int or float to string = 6 + "" = "6"
String to int or float = parseInt("10")  =10
parseFloat("10.5") =10.5
parseInt(15.6) = 15
parseInt("43s64") = 43 

####Function creation

 function blaBla(x,y){
     do something here ;
     return x,y;
   }

###array declaration : var foo = new Array() ; or var foo = new Array(size); or var foo = new Array(value1,value2); or var foo =[value1 , value 2 ] ; var foo[0] = value ;

String array : var foo = new Array(size); foo[0] = "hello hiren :) " ; or names = new Array(“Henry J. Tillman”, “Sherlock Holmes”); or names = [“Henry J. Tillman”, “Sherlock Holmes”]; tips : use array.length for adding a item to the end of an array var hiren = ["12 june" ]; hiren[hiren.lenght] = "Tai Na" ; hiren[hiren.length] = "12 August" ;

** use only 1 window.onload function per page . If there are multiple js scirpt , last one will be applicable

###Create new Object : var person = new Object(); OR var person = {} ; person.name = "Hiren" ; OR person.[age] = "Hiren" ; //usefull for variable property person.age = 19 ; Shorthand : var person = {name : "Hiren" , age : "19" } ; Create method : var person = { sayname : function(){ alert("afa"); } }

exmample of passing argument in object : function displayInfo(args){ var output = "" ; if ( typeod args.name = "string") { output += "Name: " + args.name + "\n" ; } if (typeof args.age = "number"){ output += "Age: " + agrs.age + "\n" ; } alert(output) ; } displayInfo({ name : "Hiren" , age : 19 }) ;