React Js Array foreach loop
React Js Array foreach loop: ReactJS does not provide a foreach
loop as it is not designed for imperative programming. Instead, it focuses on declarative programming and building components. However, you can use JavaScript's forEach()
function to iterate over an array and perform some action on each element. However, it is generally not recommended to use this approach to update the state or manipulate the DOM directly in ReactJS.In this tutorial we will learn how use foreach loop method using React Js and Javascript method.
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How to Use Array foreach loop method with React Js?
This code is a React functional component that demonstrates how to iterate through an array of fruits using the forEach
method and display the results using React.
The useState
hook is used to define two state variables - array
and result
. array
is an array of strings that contains the names of fruits, and result
is an empty string that will be used to store the result of the forEach
loop.
The App
component is defined as a function that returns JSX. The h3
and p
tags are used to display a heading and a description, respectively. The button
tag is used to trigger the myFunction
function when clicked. The div
tag is used to display the results of the forEach
loop using dangerouslySetInnerHTML
.
The myFunction
function is called when the button is clicked. It uses the forEach
method to iterate through the array
of fruits and append each fruit and its index to the result
state variable. The prevResult
argument passed to the setResult
function is used to update the result
state variable with the new results.
When the result
state variable is updated, the div
is re-rendered with the new results.