JQuery

Interview Questions on JQuery

31. How to write “ in string that is enclosed with in double quotes?

Use \”

32. How to remove extra white space?

The $.trim() function removes all newlines 
Ex :- 
var str = "         lots of spaces before and after         ";
$( "#original" ).html( "Original String: '" + str + "'" );
$( "#trimmed" ).html( "$.trim()'ed: '" + $.trim(str) + "'" );

33. How to create an array in javascript?

Method1 :- var cars = ["Saab", "Volvo", "BMW"];
Method2 :-  var cars = new Array("Saab", "Volvo", "BMW");

34. How to find the size of an array?

Syntax :- arrayname.legth;
Ex:- 
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var legth = fruits.length;
length contains 4

35. How to sort the elements in alphabetical order in ascending?

Syntax : - arrayname.sort();
Ex:- 
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.sort();
// fruits contains : Apple,Banana,Mango,Orange

36. How to sort the elements in alphabetical order in descending?

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.sort();
fruits.reverse();
// fruits contains : Orange,Mango,Banana,Apple

37. How to disable right click in jQuery?

$(document).ready(function(){
    $(document).on("contextmenu",function(e){
        if(e.target.nodeName != "INPUT" && e.target.nodeName != "TEXTAREA")
             e.preventDefault();
     });
 });

38. How to submit a form without mouse click on submit button?

Use :    document.forms["formname"].submit();

39. How to redirect to another page?

Use :-  window.location="url_name";

40. How to hide particular div?

Syntax : - $("element").hide();
Ex :- $(".target").hide();

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