sindresorhus/eslint-plugin-unicorn
Rule proposal: No computed object property existence check
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#1,096 opened on 2021/02/05
help wantednew rule
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説明
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.