A new conditioning way, compare multiple right hand values.

[aclaymore]

Some other threads:

Comparison to multiple values syntactic sugar

In ECMA I would use (variable === val1 || variable === val2 ...) to attempt to compare a variable to multiple values. I think it would be a lot more elegant to run variable === | val1, val 2 | and have it automatically expand.

Chained comparison syntax

Would it be a good idea to introduce a chained comparison syntax? For example, Python has them.

Operators: ||==, ||===

Could we use chaining comparison operators? Multiple comparisons: if( a === "first-comparison" || a === "second-comparison" || a === "third-comparison ) ... Chained comparisons: if( a ||=== "first-comparison ||=== "second-comparison" ||=== "third-comparison" ) ... The same syntax would work for &&. This is such a common issue that I assume it has already been proposed and rejected, but I couldn't find the conversation. The stack overflow question is 10 years old with 100k views. …