Front End Programmer Question: Download Front End Developer PDF

How to increase page performance?

Answer:

(1) Sprites, compressed images, smaller images;
(2) include JavaScript at the bottom of the page;
(3) minify or concatenate your CSS and JavaScript; and
(4) caching.

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Using jQuery how would you hide the image when the user clicks it for the following code snippet? <div class="content"> <p>Some Content Here</p> <p class="loader"><img src="ajax-loader.gif"></p> </div>	Tell me the difference between visibility:hidden; and display:none;?