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JavaScript JavaScript and the DOM (Retiring) Getting a Handle on the DOM Select a Page Element By Its ID

John Fisher
John Fisher
7,974 Points
Posted by John Fisher
John Fisher
7,974 Points

Can someone convert this Arrow function to a ES5 style function?

can somebody rewrite this Arrow Function as a ES5 style function? I'm having trouble following how it works and think would help me understand. I've watched the workshop on Arrow Functions but none of the examples really look like the one here.

const myHeading = document.getElementById('myHeading');
const myButton = document.getElementById('myButton');
const myTextInput = document.getElementById('myTextInput');
const resetButton = document.getElementById('resetButton');

myButton.addEventListener('click', () => {
  myHeading.style.color = myTextInput.value ;
});

thanks

2 Answers

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

It's pretty easy to convert back to traditional function notation.

In the case of an anonymous lambda function like this one, just put the keyword "function" in front of the parentheses, and remove the "arrow":

myButton.addEventListener('click', function () {
  myHeading.style.color = myTextInput.value ;
});
John Fisher
John Fisher
7,974 Points
John Fisher
John Fisher
7,974 Points

Thanks. Makes a lot more sense now. I don't think I remember seeing any lambda functions so far on the JavaScript Beginners track so it threw me a bit.

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

May as well get used to them. They are extremely common in JavaScript.