Question

For example i need to check if current context is jQuery stack. How would you do it? Ignoring methods checking. It’s ugly solution. 🙂

For example:

if(it_is_jquery_stack_context) {
// do some stuff with jQuery support
}
else {
// do some  stuff without it
}

UPDATE

For example:

if(typeof this.get=='function' && this.length && this.get(0)===dom_ element) { 
   // do some stuff
}

The last question is:

How to check if this.get(0) is instance of dom element?

Answer 1

Really just guessing your problem here but if you mean to check if this refers to an jQuery object you can do:

if( "jquery" in this ) { //lowercase intended
// do some stuff with jQuery support
}
else {
// do some  stuff without it
}

note that by jQuery object I mean a jQuery object, not the jQuery namespace.. as in "jquery" in jQuery is false but "jquery" in jQuery("div") is true.

The last question is:

How to check if this.get(0) is instance of dom element?

For example:

this[0] && this[0].nodeType && this[0].nodeType === 1

But this is useless as jQuery objects don’t always have dom nodes in them.