constisEmptyObject =(obj) =>{returnObject.keys(obj).length ===0&& obj.constructor ===Object; }console.log(isEmptyObject(emptyObject));// true This is by far the simplest method for determining whether an object is empty, though it's a bit verbose. We'll remove this verbosity with th...
How to Check if Object is Empty in JavaScriptHere's a Code Recipe to check if an object is empty or not. For newer browsers, you can use plain vanilla JS and use the new "Object.keys" 🍦 But for older browser support, you can install the Lodash library and use their "isEmpty" ...
How to Check If an Object Is Empty in JavaScript Use Object.keys Loop Over Object Properties With for…in Use JSON.stringify Use jQuery Use Underscore and Lodash Libraries 1. Use Object.keys Object.keys will return an array, which contains the property names of the object. If the length of...
The JavaScript function above takes in an object as a parameter before checking to see whether it is empty or not. If the object is empty, this function will return a boolean TRUE value. If the object isnot empty, then it will return a FALSE value. Basically, this function loops through...
// 从文末链接的'相等性判断'对照表可知: // 当一个类型为Object的变量与...
console.log(isEmptyObject(newRegExp());//output: false Once again, this method will fail on anullorundefinedinput. 3.JSON.stringify TheJSON.stringifymethod is used to convert a JavaScript object to a JSON string. So we can use it to convert an object to a string, and we can compare ...
Javascript 中关于if(xx)和 x==y的判断是非常基础但却十分重要的内容,以下是笔者学习的一些总结: 1、if(xx)的判断: 在if(xx)的判断中,括号里的内容会强制转换会布尔类型,结果为true则后面语句执行,为false则不执行。在此注意一条就可以了:对于括号里的表达式,会被强制转换为布尔类型. ...
Read this tutorial and find methods of checking whether a JavaScript object is empty or not. Choose the best one for you and get the code immediately.
为了实现这个功能,我们可以使用 jQuery 的$.isEmptyObject()方法判断对象是否为空,以及===运算符判断值是否为空。代码如下所示: if($.isEmptyObject(obj)){// 对象为空,返回 falsereturnfalse;}elseif(obj.value1===null&&obj.value2===undefined&&obj.value3===''){// 三个值都为空,返回 falsereturn...
For JavaScript objects, there is no built-in .length or .isEmpty method available to check if they are empty. Here are 4 different methods that you can use to make sure that a given object does not have its own properties: Object.entries() Method The Object.entries() method takes an ...