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Start your free trialLee Fendley
3,006 PointsWhy can you not use the 'this' keyword within the event listener to reference the clicked element?
In the video an event listener is added to the title variable, and then the function references the 'title.style.color' - why can this reference not be 'this.style.color' if 'this' would capture the clicked element? i.e:
const title = document.getElementById('myHeading');
title.addEventListener('click', () => {
this.style.color = 'red';
});
2 Answers
Steven Parker
231,268 PointsUsing "this" within an event handler requires the handler to be defined with a conventional function declaration. It cannot be used when the function is defined with an arrow function, since one of the ways they are different from conventional functions is that they do not define "this".
An alternate way to access the event target that works with both kinds of functions is to pass in the event object and reference the "target" property:
title.addEventListener('click', e => {
e.target.style.color = 'red';
});
For more details on the function differences, see the MDN page on Arrow Functions.
Lee Fendley
3,006 PointsCheers Steven Parker, that makes sense now