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並前往https://medium.com/@carlibotes/is-the-object-is-empty-afdabee326dc

10 Ways to check if an Object is empty in Javascript - Medium

1. ECMA 7+. Object.entries(obj).length === 0 && obj. · 2. ECMA 5+. Object.keys(obj). · 3. Pre-ECMA 5. function isEmpty(obj) { for(var prop in obj) { · 4. jQuery.

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