How to filter an array in JavaScript using the filter method?

In JavaScript, you can use the filter() method of an array to filter it. This method creates a new array that contains elements that meet specific conditions. It takes a callback function as a parameter, which is used to evaluate each element of the array.

Here is an example demonstrating how to use the filter() method to filter elements in an array.

const numbers = [1, 2, 3, 4, 5];

// 过滤出大于2的数字
const filteredNumbers = numbers.filter(function(number) {
  return number > 2;
});

console.log(filteredNumbers); // 输出: [3, 4, 5]

In the example above, the callback function of the filter() method checks if each number is greater than 2. Only numbers greater than 2 will be kept in the new array filteredNumbers.

In addition to traditional anonymous functions, you can also use arrow functions to simplify your code.

const filteredNumbers = numbers.filter(number => number > 2);

You can add more conditions to filter the array by using logical operators (such as && and ||) to combine conditions in the callback function.

I hope this example helps you!