How to check if two vars have the same reference?

javascript equality
clarkk picture clarkk · Dec 3, 2012 · Viewed 39.7k times · Source

How can you check if two or more objects/vars have the same reference?

Answer

Denys Séguret picture Denys Séguret · Dec 3, 2012

You use == or === :

var thesame = obj1===obj2;

From the MDN :

If both operands are objects, then JavaScript compares internal references which are equal when operands refer to the same object in memory.

Related questions

Which equals operator (== vs ===) should be used in JavaScript comparisons?

I'm using JSLint to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like comparing idSele_UNVEHtype.value.length == 0 inside of an if statement. Is there a performance benefit …

Read More
Checking if two Dates have the same date info

How can I check if two different date objects have the same date information(having same day, month, year ...)? I have tried "==", "===" and .equals but none seems to work.

Read More
JavaScript Date Comparisons Don't Equal

I've tried searching for people with similar questions, but haven't found anything. I have two dates in JavaScript, both set to the same value... Equality Testing fails on ==, but >= and <= evaluate true. Below is the code I have …

Read More