How do you check if a string is equal to another string in javascript?
What is the correct way to check for equality between Strings in JavaScript? Show
asked Aug 27, 2010 at 17:37
8 always Until you fully understand the differences and implications of using the For insight into this, and other "good vs. bad" parts of Javascript read up on Mr. Douglas Crockford and his work. There's a great Google Tech Talk where he summarizes lots of good info: http://www.youtube.com/watch?v=hQVTIJBZook Update: The You Don't Know JS series by Kyle Simpson is excellent (and free to read online). The series goes into the commonly misunderstood areas of the language and explains the "bad parts" that Crockford suggests you avoid. By understanding them you can make proper use of them and avoid the pitfalls. The
"Up & Going" book includes a section on Equality, with this specific summary of when to use the loose (
I still recommend Crockford's talk for developers who don't want to invest the time to really understand Javascript—it's good advice for a developer who only occasionally works in Javascript. answered Aug 27, 2010 at 17:39
STWSTW 43.6k17 gold badges106 silver badges157 bronze badges 18 If you know they are strings, then there's no need to check for type.
However, note that string objects will not be equal.
will return false. Call the valueOf() method to convert it to a primitive for String objects,
will return true answered Aug 27, 2010 at 17:40
AnuragAnurag 138k36 gold badges219 silver badges257 bronze badges 6 Just one addition to answers: If all these methods return false, even if strings seem to be equal, it is possible that there is a whitespace to the left and or right of one string. So, just put a
I have lost hours trying to figure out what is wrong. Hope this will help to someone! answered May 2, 2017 at 13:41
akelecakelec 3,5293 gold badges40 silver badges38 bronze badges 8 You can use a == b (and its negation !=) a === b (and its negation !==) answered Aug 3, 2020 at 19:44
Kamil KiełczewskiKamil Kiełczewski 75.5k26 gold badges335 silver badges311 bronze badges 5 what led me to this question
is the check my case
and title was
answered Jul 27, 2016 at 10:52
1 There are actually two ways in which strings can be made in javascript.
So the best way to check for equality is using the If you want to check for equality between two objects then using
answered May 2, 2015 at 19:11
AbhishekAbhishek 1,1961 gold badge8 silver badges12 bronze badges String
Dunc 17.7k6 gold badges82 silver badges99 bronze badges answered Jul 4, 2018 at 12:33
Muhammad UsmanMuhammad Usman 7951 gold badge10 silver badges18 bronze badges 1 Strict ComparisonsTo do simple comparison, use
Alphabetical ComparisonsIf you
want to compare two strings to know if a string comes before or after another string, based on natural sorting, use the
answered May 26, 2021 at 15:47
HoldOffHungerHoldOffHunger 16.7k8 gold badges92 silver badges121 bronze badges Considering that both strings may be very large, there are 2 main approaches I recommed this function
answered Feb 25, 2020 at 10:25
NagibabaNagibaba 3,3341 gold badge31 silver badges38 bronze badges Also consider that answered Apr 19 at 20:09
grssnbchrgrssnbchr 2,8256 gold badges35 silver badges69 bronze badges For strings, we have a supported method Usage:
answered Aug 7 at 8:17
Can you use == to compare strings in JavaScript?In JavaScript, strings can be compared based on their “value”, “characters case”, “length”, or “alphabetically” order: To compare strings based on their values and characters case, use the “Strict Equality Operator (===)”.
How do you check if two strings are equal to each other?You can check the equality of two Strings in Java using the equals() method. This method compares this string to the specified object. The result is true if and only if the argument is not null and is a String object that represents the same sequence of characters as this object.
What is == and === in JavaScript?== in JavaScript is used for comparing two variables, but it ignores the datatype of variable. === is used for comparing two variables, but this operator also checks datatype and compares two values. Checks the equality of two operands without considering their type. Compares equality of two operands with their types.
Can we compare two strings in JavaScript?Two strings in Javascript can be compared to check whether they are the same or not using different methods like toUpperCase(), localeCompare(), etc. We can also compare two strings in javascript using RegEx. Operators like greater than, or less than or equality operators to compare two strings.
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