quiz

difference?

$(document).ready(...); //jquery's

and

window.onload();

 
ready event occurs after the HTML document has been loaded,

while the onload event occurs later, when all content (e.g. images)

also has been loaded
 
 

difference?

  
$("li:parent");
$("li.parent");
$("li").parent();
$("li").parents();

how to select elements inside a DOM element?

var myDomElement = document.getElementById( "myId" );

// select all anchor tags inside myID

 
 $(myDomElement).find('a');
 
 

how to test whether an element has a particular class?

 
$("#myDiv").hasClass( "someClass" ); 
 
 

output?

function func1()
{
  return {
      type: "ABC"
  };
}

function func2()
{
  return
  {
      type: "ABC"
  };
}

console.log(func1());
console.log(func2());

output?

function func1() {
  var a = b = 3;
}

func1();

console.log(a);
console.log(b);

 
 undefined
 3
 
 

output?

console.log(1.1 + 2.2);
console.log(1.1 + 2.2 == 3.3);

 
 3.3000000000000003
 false
 
 

output?

console.log(1); 
setTimeout(function(){console.log(2)}, 1000); 
setTimeout(function(){console.log(3)}, 0); 
console.log(4);

 
1
4
3
2
 
 

output?

console.log(2 +  "2" + "2");

 
222
 
 

output?

console.log(2 +  +"2" + "2");

 
42
 
 

output?

console.log(false == '0');

 
true
 
 

output?

console.log(false === '0');

 
false
 
 

which is more efficient?

document.getElementById( "someId" );

or

$( "#someId" );

difference?

$('#myDiv').detach();
$('#myDiv').remove();

how can you make a div round?

 
$( "#myDiv" ).css("border-radius", "50%");
 
 

how to determine the state of a toggled element?

 
$( "#myDiv" ).is( ":visible" );
$( "#myDiv" ).is( ":hidden" );
 
 

how to change the src attribute of an image at run-time?

 
$( "img#myDiv" ).attr("src", "NEW_SRC_PATH");
 
 

how can you animate a div from top-left corner to bottom-right corner?