Jun 3, 2012 · This is the strict not equal operator and only returns a value of true if both the operands are not equal and/or not of the same type. The following examples return a Boolean true:

I want to write an if/else statement that tests if the value of a text input does NOT equal either one of two different values. Like this (excuse my pseudo-English code):

return true; } will return true. As a rule of thumb, remember that: JavaScript has both strict and type-converting equality comparison. For strict equality the objects being compared must have the same …

Dec 11, 2008 · The strict equality operator (===) behaves identically to the abstract equality operator (==) except no type conversion is done, and the types must be the same to be considered equal. …

not a good solution if you are checking if a number is assigned (0 will evaluate to false, even though the value is not null). Better check directly if the value is equal to null (value === null)

Jul 29, 2012 · 5 As from The Definitive Guide to Javascript. Objects are not compared by value: two objects are not equal even if they have the same properties and values. This is true of arrays too: …

In all other cases, you're safe to use ==. Not only is it safe, but in many cases it simplifies your code in a way that improves readability. I still recommend Crockford's talk for developers who don't want to …

Jun 24, 2019 · ! not operator != checks if the two parameters are not equal to each other !== checks if the two parameters are not equal to each other or the type is not the same > checks if one parameter …

Sep 5, 2017 · This check is actually not safe. If myvar is 0, false or any other falsy value the test will fail (if you only intend to check for not null). So only use this to check for not null if the variable can never …

1037 A strict equality operator will tell you if two object types are equal. However, is there a way to tell if two objects are equal, much like the hash code value in Java? Stack Overflow question Is there any …