CODEWITHSUNDEEP
javascriptjquery
Moons
Moons

Reputation: 3854

Access properties of unknown object in javascript

I am asp.net developer. I am working on some third party tools that have javascript code.

Like:

"function(s, e) { alert(e) }; "

If i wrote e then it return as an object.

How can i find the properties of this object?

Is there some easy way/ may be using Firebug etc.

Any Ideas?

Upvotes: 0

Views: 124

Answers (3)

zzzzBov
zzzzBov

Reputation: 179046

console.log will log a message to the console. With Firebug and the chrome developer tools this will often provide an interactive interface into the object's properties. If the object is array-like, consoles will often display it as ['val1', 'val2', ...] instead of {'key': 'value'}.

console.log can take multiple arguments, so you're better off separating values as:

console.log('Foo:', foo, 'Bar:', bar);

rather than trying to use string concatenation, which would ruin the interactivity of the console.

Additionally, DOM elements in the nicer consoles can often be hovered to highlight where the element occurs on the page.

That all said, DOM elements are often not expandable in the console, which can be inconvenient if you want to explore their properties.

Use console.dir if you want to force an object to be expandable in the console.

Upvotes: 1

VVV
VVV

Reputation: 7593

console.log(e) in firebug will list all of it's properties

Upvotes: 1

Lloyd
Lloyd

Reputation: 29668

In most debug tools you can just type it into the console to inspect it.

You can also do:

console.log(e);

Upvotes: 2

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