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housecricket/existence_of_a_property.js

Created August 15, 2020 10:12
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existence_of_a_property.js
// ✗ avoid
if (obj.prop) { .. }
if (obj.prop !== undefined) { ... }
// ✓ ok
if (Object.prototype.hasOwnProperty.call(obj, 'prop')) { ... }
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