JavaScript: Simple way to check if variable is equal to two or more values?
187
How do I check if an array includes a value in JavaScript?
127745
Why does 2 == [2] in JavaScript?
30610
fastest way to detect if a value is in a group of values in Javascript
149701
How to check that a string is parseable to a double?
3526
How to determine equality for two JavaScript objects?
74709
How to elegantly check if a number is within a range?
53248
Check variable equality against a list of values
134318
Is it safe to check floating point values for equality to 0?
40229
How do I check if a variable exists?
59343
Check whether an input string contains a number in javascript
58046
How to check whether a string contains a substring in JavaScript?
105531
Determining if a variable is within range?
121335
Elegantly determine if more than one boolean is "true"
134025
How to check if an array value exists?
139679
How can I check if an array contains a specific value in php?
37369
How do I check if two logical expressions are equivalent?
42629
How to compare arrays in JavaScript?