If property name is a variable, this may leads to unexpected result.
Fail
if (foo[bar]) {}if (bar in foo) {}In these cases if bar is 'toString', 'constructor' etc, it will be true.
Pass
if (foo[bar] === true) {}if (Object.prototype.hasOwnProperty.call(foo, bar)) {}Problem: foo maybe an array, static check can't know.
Idea from prettier/prettier#10256
sindresorhus / eslint-plugin-unicorn
More than 100 powerful ESLint rules
4.2k
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