javascript if hasclass code example

Example 1: javascript hasclass

if (document.body.classList.contains('thatClass')) {
    // do some stuff
}

Example 2: javascript hass class

if (myElement.classList.contains('someClassname')) {
    // do something
}

Example 3: check if has name javascript

function whatIsInAName(collection, source) {
  // "What's in a name? that which we call a rose
  // By any other name would smell as sweet.”
  // -- by William Shakespeare, Romeo and Juliet
  var srcKeys = Object.keys(source);

  return collection.filter(function(obj) {
    return srcKeys.every(function(key) {
      return obj.hasOwnProperty(key) && obj[key] === source[key];
    });
  });
}

// test here
whatIsInAName(
  [
    { first: "Romeo", last: "Montague" },
    { first: "Mercutio", last: null },
    { first: "Tybalt", last: "Capulet" }
  ],
  { last: "Capulet" }
);