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" ...
With JavaScript, it can be difficult to check whether an object is empty. With Arrays, you can easily check withmyArray.length, but on the other hand, objects do not work that way. The best way to check if an object is empty is by using a utility function like the one below. functi...
Object.keys()is a static method that returns an Array when we pass an object to it, which contains the property names (keys) belonging to that object. We can check whether thelengthof this array is0or higher - denoting whether any keys are present or not. If no keys are present, the...
1. Use Object.keys Object.keys will return an array, which contains the property names of the object. If the length of the array is 0, then we know that the object is empty. function isEmpty(obj) { return **Object.keys(obj).length === 0**; } We can also check this using Objec...
The length property is used to check the number of keys. If it returns 0 keys, then the object is empty.Javascript empty object1 2 3 4 5 6 7 //javascript empty object let obj = {}; function isEmpty(object) { return Object.keys(object).length === 0; } let emptyObj = isEmpty(...
In your day-to-day JavaScript development, you might need to check if an object is empty or not. And if you’ve had to do this, you probably know that there’s no single direct solution. However, there are different techniques that you can use to create a custom solution for your own...
* A custom function that checks whether a JavaScript object * is empty or not,. * @param {type} obj * @returns {Boolean} TRUE if the object is empty. FALSE if it isn't. */ function isEmptyObject(obj){ //Loop through and check if a property ...
isEmptyObject(100) // falseisEmptyObject(true) // falseisEmptyObject([]) // false复制代码 1. ??? 但是,请注意(小心)!以下这些值将会抛出异常。 AI检测代码解析 // TypeError: Cannot covert undefined or null ot objectgoodEmptyCheck(undefined) good...
Object.keys() Method The Object.keys() method is the best way to check if an object is empty because it is supported by almost all browsers, including IE9+. It returns an array of a given object's own property names. So we can simply check the length of the array afterward: Object...
functiongoodEmptyCheck(value){value&&Object.keys(value).length===0&&value.constructor===Object;//?constructorcheck}二、旧浏览器中使用Object.prototype.toString.call()判断旧浏览器中不支持ES新方法 我们使用Object.prototype.toString.call()配合JSON.stringify(value)==='{}'来判断 functionis...