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To check whether the value of any variable is empty.
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| /** | |
| * @param data - any datatype value. | |
| */ | |
| function isEmpty(data) { | |
| if (typeof data == "number" || typeof data == "boolean") return false; | |
| if (typeof data == "undefined" || data === null) return true; | |
| if (typeof data.length != "undefined") return data.length == 0; | |
| let count = 0; | |
| for (let i in data) if (data.hasOwnProperty(i)) count++; | |
| return count == 0; | |
| } |
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