Avoid Javascript’s ‘with’ keyword

Comments

5 responses to “Avoid Javascript’s ‘with’ keyword”

1. 

   2009-07-21

   Louigi Verona

   Are you using jQuery? I found it to be very fast and much easier syntax than JavaScript.

   Reply
   1. 

      2009-07-21

      Barry van Oudtshoorn

      I actually use MooTools by preference — it provides many of the same benefits as jQuery, and the syntax is similar.

      Reply
2. 

   2009-08-26

   Martin

   Think you might not have grasped the main benefit of with … it’s for setting lots of properties, e.g.

   var oMyElement = document.createElement( 'DIV' );
with ( oMyElement )
{
id = 'Fred';
with ( style )
{
width = '100px';
height = '100px';
display = 'inline';
}
}

   Reply
   1. 

      2009-08-26

      Barry van Oudtshoorn

      Yes, you’re right that with can be very useful — but to my mind, the danger of not knowing exactly what you’re changing outweighs the potential benefit. Personally, I would use the MooTools method of setting lots of properties…

      var oMyElement = new Element('div', {
id: 'Fred',
styles: {
width: '100px',
height: '100px',
display: 'inline'
}
});

      …which means that I can get away without using with. 🙂

      Reply
3. 

   2010-11-21

   Rami

   According to what you are saying
   the main issue is to avoid ambiguity -and this is a good concept)

   think of this snippets

   var if; //why this does not work

   meaning you should be careful with naming
   et voila

   Reply

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