Skip to main content

Difference between single quotes and double quotes in Javascript


I know that in PHP the only difference between double quotes and single quotes is the interpretation of variable inside a string.



Well, in jQuery Javascript, I often see doublequotes used in jQuery selectors, or in strings, is there a particular reason for that or is single quotes just the exact same as doublequotes?


Source: Tips4allCCNA FINAL EXAM

Comments

  1. You'll want to use single quotes where you want double quotes to appear inside the string (e.g. for html attributes) without having to escape them, or vice versa. Other than that, there is no difference.

    ReplyDelete
  2. There is a difference in JSON, so I have started switching to using double-quotes as much as possible so that I don't make mistakes when dealing with JSON.

    ReplyDelete
  3. Absolutly no difference. FREE QUOTING YEEHHAAA

    ReplyDelete
  4. They are the same, I usually use single quotes but thats because I am a .net developer and asp.net in particular so it aids me in distinguishing between the 2 types of strings.

    ReplyDelete

Post a Comment

Popular posts from this blog

Why is this Javascript much *slower* than its jQuery equivalent?

I have a HTML list of about 500 items and a "filter" box above it. I started by using jQuery to filter the list when I typed a letter (timing code added later): $('#filter').keyup( function() { var jqStart = (new Date).getTime(); var search = $(this).val().toLowerCase(); var $list = $('ul.ablist > li'); $list.each( function() { if ( $(this).text().toLowerCase().indexOf(search) === -1 ) $(this).hide(); else $(this).show(); } ); console.log('Time: ' + ((new Date).getTime() - jqStart)); } ); However, there was a couple of seconds delay after typing each letter (particularly the first letter). So I thought it may be slightly quicker if I used plain Javascript (I read recently that jQuery's each function is particularly slow). Here's my JS equivalent: document.getElementById('filter').addEventListener( 'keyup', function () { var jsStart = (new Date).getTime()...

Is it possible to have IF statement in an Echo statement in PHP

Thanks in advance. I did look at the other questions/answers that were similar and didn't find exactly what I was looking for. I'm trying to do this, am I on the right path? echo " <div id='tabs-".$match."'> <textarea id='".$match."' name='".$match."'>". if ($COLUMN_NAME === $match) { echo $FIELD_WITH_COLUMN_NAME; } else { } ."</textarea> <script type='text/javascript'> CKEDITOR.replace( '".$match."' ); </script> </div>"; I am getting the following error message in the browser: Parse error: syntax error, unexpected T_IF Please let me know if this is the right way to go about nesting an IF statement inside an echo. Thank you.