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Start your free trialAnthony Smith
9,897 PointsHow to alter the javascript code without adding any lines to the blue button's event handler?
Shouldn't this work? I am simply taking the code and using it in a if else statement. Although not specifically what the challenge asks for but I still think it should work this way if needed.
const redButton = document.getElementById('redButton');
const blueButton = document.getElementById('blueButton');
redButton.addEventListener('click', (e) => {
const colorSquare = document.getElementById('colorDiv');
if (e.target.tagName === 'redButton') {
colorSquare.style.backgroundColor = 'red';
} else if (e.target.tagName === 'blueButton') {
colorSquare.style.backgroundColor = 'blue';
}
});
div {
height: 50px;
float: left;
padding-top: 40px;
padding-left: 20px;
}
#colorDiv {
padding: 0;
width: 100px;
height: 100px;
background-color: gray;
}
button {
height: 30px;
border-radius: 10px;
}
#redButton {
background-color: #ff5959;
border-color: red;
}
#blueButton {
background-color: lightblue;
border-color: #7C9EFC;
}
1 Answer
Steven Parker
231,236 PointsThis doesn't work for the red button because "redButton" is being compared with the tagName when it is actually the id.
And it won't work on the blue button even after fixing the id reference because the handler is only being attached directly to the red button.
But you could make it a delegated handler for both by attaching it to a common parent (like the body) instead:
document.body.addEventListener("click", e => {
const colorSquare = document.getElementById("colorDiv");
if (e.target.id === "redButton") {
colorSquare.style.backgroundColor = "red";
} else if (e.target.id === "blueButton") {
colorSquare.style.backgroundColor = "blue";
}
});