reactjsHow do I use filters in ReactJS?

Filters in ReactJS are used to manipulate data and render the desired output. To use filters in ReactJS, you need to create a function that takes the data as an argument, and then use the .filter() method to filter the data based on the criteria you specify.

For example, let's say you have an array of objects that contains objects with a name and age property. You can use the .filter() method to filter out objects that don't meet the criteria you specify:

const people = [
  {name: 'John', age: 30},
  {name: 'Jane', age: 20},
  {name: 'Bob', age: 40},
];

const filteredPeople = people.filter(person => person.age > 30);

console.log(filteredPeople);
// [{name: 'Bob', age: 40}]

In the example above, the .filter() method takes a callback function that returns a boolean value. The callback function takes a single argument (in this case, person), which is the current object being iterated over in the array. The .filter() method will then return an array of objects that meet the criteria specified in the callback function (in this case, objects with an age property greater than 30).

In addition to the .filter() method, you can also use the Array.prototype.map() method to filter data. The .map() method takes a callback function as its argument and returns a new array with the results of the callback function applied to each element in the original array.

Helpful links

• MDN - Array.prototype.filter()
• MDN - Array.prototype.map()

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