How to Detect a Mobile Device With JavaScript
The JavaScript API “window.matchMedia()” with CSS “media queries” is used to detect a mobile device with JavaScript. This is the efficient and easiest way.
How to Count Certain Elements in an Array in JavaScript
To count certain elements in an array in JavaScript, use the “filter()” method, “reduce()” method, or the traditional “for” loop.
How to Check if an Array Includes a Value in JavaScript
Use the “includes()” method, “indexOf()” method, or the “some()” method to check if an array includes a value in JavaScript.
How to Use textarea Input in JavaScript
Use the “getElementById(‘id’).value” for using the textarea input in JavaScript. It helps to get the input value of the text area.
How to Reload the div Without Reloading Entire Page in jQuery
To reload the div without reloading the entire page using jQuery, use the on() method in combination with the load() method.
How to Extract a Number From a String in JavaScript
The regular expression in combination with the replace() method or the match() method can be utilized to extract a number from a string in JavaScript.
How to Export a Function in JavaScript
To export a JavaScript function, there are two ways, one is defining a function with the “export” keyword and other is exporting the already defined function.
How to Display Image With JavaScript
Use the “createElement()” method to display images with JavaScript as the createElement() method is used to create an element node.
Date.getDay() Returns Wrong Day in JavaScript [Fixed]
The “getDate()” method is used for getting the day of the month instead of the “getDay()” method. Because the getDay() returns the number between 0 and 6.
Convert Integer to Its Character Equivalent in JavaScript
The charCodeAt() and the String.fromCharCode() methods can be implemented in combination to convert the integer to its character equivalent in JavaScript.
Convert Array of Starings to Array of Numbers in JavaScript
The map() method, forEach() and push() methods or reduce() and concat() methods can be used to convert an array of strings to an array of numbers in JavaScript.
Check if Object is Not instanceof Class in JavaScript
The instanceof operator combined with logical not(!) operator or the boolean value can be used to check if an object is not an instance of class in JavaScript.
Check if Body has a Specific Class Using JavaScript
classList property and contains() method, getElementsByTagName() and match() methods or jQuery can be used to check if a body has specific class in JavaScript.
Add 1 Day to a Date Using JavaScript
The “setDate()” method with the “getDate()” method and “Date.now()” method is used to add 1 day to a date using JavaScript.
How to Check if a Value is Falsy in JavaScript
The logical not(!) operator in combination with the if/else condition or the every() method can be applied to check if a value is falsy in JavaScript.
Remove Null Values From an Array in JavaScript
“filter()” method, “forEach()” method, or the traditional “for” loop is used to remove null values from an array in JavaScript.
Join non-Empty Strings With a Separator in JavaScript
“filter()” method with “join()” method is used to join non-empty strings with separator in JavaScript. The join() method joins strings, including empty strings.
How to Get the Length of a Map in JavaScript
The size property can be utilized to get the length of a map directly or by placing an exception upon the map key in JavaScript.
Convert an ISO String to a Date Object in JavaScript
“newDate()” constructor of the Date Object or the “Date.parse()” method is used to convert an ISO string to a Date object in JavaScript.
Convert a Date string to a Timestamp Using JavaScript
The getTime() method or the Date.parse() method can be implemented to convert a date string to a timestamp using JavaScript.