JavaScript allows multiple class members with the same identifier, and the last duplicate class member takes precedence over previous declarations, which is undesired behavior. Disallow duplicate class members.
classA{foo(){}bar(){}}classA{staticfoo(){}foo(){}}classA{getfoo(){}setfoo(value){}}classA{staticfoo(){}getfoo(){}setfoo(value){}}classA{foo(){}}classB{foo(){}}classA{[foo](){}foo(){}}classA{'foo'(){}'bar'(){}baz(){}}classA{*'foo'(){}*'bar'(){}*baz(){}}classA{get'foo'(){}get'bar'(){}getbaz(){}}classA{1(){}2(){}}classA{['foo'](){}['bar'](){}}classA{[`foo`](){}[`bar`](){}}classA{[12](){}[123](){}}classA{[1.0](){}['1.0'](){}}classA{[0x1](){}[`0x1`](){}}classA{[null](){}[''](){}}classA{get['foo'](){}set['foo'](value){}}classA{['foo'](){}static['foo'](){}}// computed "constructor" key doesn't create constructor
classA{['constructor'](){}constructor(){}}classA{'constructor'(){}[`constructor`](){}}classA{constructor(){}get[`constructor`](){}}classA{'constructor'(){}set['constructor'](value){}}// not assumed to be statically-known values
classA{['foo'+''](){}['foo'](){}}classA{[`foo${''}`](){}[`foo`](){}}classA{[-1](){}['-1'](){}}// private and public
classA{foo;staticfoo;}classA{foo;#foo;}classA{'#foo';#foo;}
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rulesets:- javascript-best-practices # Rules to enforce JavaScript best practices.