To filter an array with multiple conditions in JavaScript, you can use the “Array.prototype.filter()” method. You can combine multiple conditions using logical operators such as “&& (AND)” or “|| (OR)” in the callback function provided by the filter() method. Syntax const filteredArray = originalArray.filter(item => condition1 && condition2 && … && conditionN); Example const items … Read more
To add a class to a given element in JavaScript, you can use the “element.classList.add()” method. The add() method of the DOMTokenList Interface for modern browsers adds the given token to the list. Syntax element.classList.add(“your_class_name”); You can also add multiple classes to your HTML elements. element.classList.add(“class_1”, “class_2”, “class_3”) Example The Element.classList is a read-only property that … Read more
To get the current date and time in UTC, use the “Date object’s getUTC*()” method in JavaScript. Diagram of getUTC*() methods Example const now = new Date(); const year = now.getUTCFullYear(); const month = now.getUTCMonth() + 1; const day = now.getUTCDate(); const hours = now.getUTCHours(); const minutes = now.getUTCMinutes(); const seconds = now.getUTCSeconds(); const milliseconds = … Read more
To fix the unexpected reserved word ‘await’ error in JavaScript, declare your function “async”. The error “unexpected reserved word await” occurs when we use the ‘await’ keyword inside a not marked as async function. If we need to use the ‘await’, we should make the function ‘async’. function getString() { // not marked as async function … Read more
To convert a String to an Object in JavaScript, you can use the JSON.parse() method. Diagram Syntax JSON.parse(string,function); Parameters string: It is a string that can be valid for any data type. function: It is an optional argument. We can pass this to our custom function if we want to perform some operation on our … Read more
To write a file in JavaScript, you can use the “writeFile()” method of the fs(File-System) module. By default, the file would be replaced if it existed. Visual Representation Syntax writeFile(Path, Data, callback) Parameters The writeFile() method accepts three parameters: path, data, and callback. path: This is the location of the Text file. If you want … Read more
To convert a URL to a String in JavaScript, you can use either the “toString()” or “encodeURI()” methods. Method 1: Using the toSting() function The toString() is a stringifier method that returns a USVString containing the whole URL. Even the query string has been converted to a string. So we can’t store query string key … Read more
