count all elements with class jquery

//map() methods returns a new array const data = {name: “laptop”, brands: [“dell”, “acer”, “asus”]} let inside_data = data.brands.map((i) => { console.log(i); //dell acer asus }); Here is what the above code is Doing: 1. We have an object called data. 2. We have a property called brands which is an array. 3. We are…

for(var key in dict) { console.log(key) } Here is what the above code is Doing: 1. We create a dictionary called dict. 2. We use a for loop to iterate through the dictionary. 3. We print out the key of each item in the dictionary.

fetch(‘https://cors-anywhere.herokuapp.com/’ + fileURL, { method: ‘GET’, headers: { ‘Content-Type’: ‘application/pdf’, }, }) .then((response) => response.blob()) .then((blob) => { // Create blob link to download const url = window.URL.createObjectURL( new Blob([blob]), ); const link = document.createElement(‘a’); link.href = url; link.setAttribute( ‘download’, `FileName.pdf`, ); // Append to html link element page document.body.appendChild(link); // Start download link.click(); //…

npm install robotjs Here is what the above code is Doing: 1. Import the robotjs library. 2. Get the mouse position. 3. Move the mouse to the top left of the screen. 4. Get the mouse position again. 5. Print the new mouse position.

// You can use (?!…) like the example below let names = [‘JOAO’, ‘JOHN’, ‘JOANA’, ‘JOABE’]; for(let n of names) { /(JO)(?!A)/.test(n); // only true on ‘JOHN’ } Here is what the above code is Doing: 1. It’s looping through the names array 2. It’s testing each name against the regular expression 3. The regular…

function invertColor(hex, bw) { if (hex.indexOf(‘#’) === 0) { hex = hex.slice(1); } // convert 3-digit hex to 6-digits. if (hex.length === 3) { hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2]; } if (hex.length !== 6) { throw new Error(‘Invalid HEX color.’); } var r = parseInt(hex.slice(0, 2), 16),…