To remove the next element in jQuery, use the remove().ExampleFollowing is the code − Live Demo            Document                    cancel(X)          Demo           ... Read More

Yes, the not not operator is the reverse process of not operator. If any value is true then single ! (not) will return false and !! will return opposite value (true).The not operator −var flag=true; console.log(!flag);The not not operator −var flag=true; console.log(!!flag);ExampleFollowing is the code −var flag=true; console.log("The result of ... Read More

The colon (:) can be used when you want to define the property to an object while equal (=) can be used when you want to assign a value to a variable.ExampleFollowing is the code −var studentDetails = {    "studentId": 101,    "studentName": "John",    "studentSubjectName": "Javascript",    "studentCountryName": ... Read More

To remove child elements, set the innerHTML to ‘’.ExampleFollowing is the code −            Document Javascript MySQL Remove the items    remove.onclick = () => {       const element = document.getElementById("removeAllChildElements");     ... Read More

Use the map() function correctly to save elements.ExampleFollowing is the code −const addIndexValueToArrayElement = function (arrObject) {    const updatedArrayValue = [];    arrObject.forEach(function (ob) {       const mapValue = ob.map(function (value) {          return value + arrObject.indexOf(ob)       })       ... Read More

To repeat string, you can use Array() along with join().ExampleFollowing is the code −            Document    String.prototype.counter = function (value) {       return new Array(value + 1).join(this);    }    console.log("The repeat string".counter(5)); To run ... Read More

If you will use equal operator(=) in if condition the if block will always be executed.You need to use == operator or === .ExampleFollowing is the code −var details = [    {       id: 10001,       name: "John"    },    {       ... Read More

To get the number of true/ false values in an array, the code is as follows −var obj = [    {       isMarried: true    },    {       isMarried: false    },    {       isMarried: true    },    {   ... Read More

To fetch a specific record, use find() with some condition.ExampleFollowing is the code −var obj=[    {       studentId:101,       studentName:"John"    },    {       studentId:102,       studentName:"Bob"    },    {       studentId:103,       studentName:"David"   ... Read More

To fix this, you can use map() in JavaScript.The syntax is as follows −var anyVariableName= new Array(yourSize).fill().map(Object);ExampleFollowing is the code −var arrayOfObject = new Array(5).fill().map(Object); console.log(arrayOfObject);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo311.js.OutputThis will produce the following output −PS ... Read More