check if element is not empty javascript





Javascript does not provide isEmpty() method to check object if it is null/ empty. However, it does provide a enumerator so we can test object if it at least has one item. In resume, there are many options to find out if an element is empty: 1- Using htmlJavaScript. var el document.querySelector(body) console.log(el) console.log( Empty : isEmptyTag(el)) console.log(Having Children : hasChildren(el)) While working with jQuery or JavaScript, if you dont know whether a variable exists (that means, if it was declared) you should check with the typeof operator. This will evaluate to true if myVars value is not: null. empty string (). I have a input and I want to check if its empty or not.Add parameter to a function title [duplicate] Traffic Light Sequence Javascript making drop down blank upon button click Add Remove CSS classes with React Unknown Provider With Angular. js filter Update page contents based on URL and Use this code snippet to check by id if an element exists in your document: if(document.getElementById(idof element)) alert(element exists!) You can achieve a similiar result using jQuery Form Validation with JavaScript - Check for Multiple Empty Text Fields - Duration: 6:10.HTML Void (Empty) Elements - Duration: 3:11. Cameron Christensen 313 views. EDIT: As some have pointed, the browser interpretation of an empty element can vary. If you would like to ignore invisible elements such as spaces and line breaks and make the implementation more consistent you can create a function (or just use the code inside of it).