So I have my JS Function that checks if a radio button is selected, then displays the value on my HTML like normal.
My problem is it only works if the default value is set to 0. How would I change this so that if I use the checked option on $5 in my HTML radio input, that it will also display that value in my browser?
If I change my checked option to a different tip value, it still shows 0 as the starting value since I didn't click anything.
Here is my JS Code
window.tip = 0;
const tipTotal = document.getElementById("tip");
const orderTotal = document.getElementById("total");
document.addEventListener("click", ({
target
}) => {
if (target.className === "tips" && target.checked) {
window.tip = parseInt(target.value);
} else {
return;
tipTotal.textContent = `$${window.tip}`;
}
I display the selected radio button here
<td id="tip">$0.00</td>
Here is my HTML Radio Buttons
<input type="radio" value="0" id="tip0" name="tip" class="tips" />
<label for="tip0">$0</label>
</div>
<div>
<input type="radio" value="300" id="tip1" name="tip" class="tips" />
<label for="tip1">$3</label>
</div>
<div>
<input type="radio" value="500" id="tip2" name="tip" class="tips" checked //here is the default checked option for $5 />
<label for="tip2">$5</label>
</div>
So by default, my app will show the tip: $5 option checked, however, the HTML on the browser for Tips will says Tip: $0.00 instead of Tip: $5.00 unless I click it
It sets window.tip only when a radio button is clicked because you added an event listener that fires only on click. You can add an on load event listener.
window.tip = 0;
const tipTotal = document.getElementById("tip");
const orderTotal = document.getElementById("total");
document.addEventListener("click", ({ target }) => {
if (target.className === "tips" && target.checked) {
window.tip = parseInt(target.value);
}
});
document.addEventListener("load", () => {
const selectedOption = document.querySelector(".tips:checked");
window.tip = parseInt(selectedOption.value);
});
I also removed an unnecessary else statement in the first event listener.
EDIT
Automatically update tipTotal text:
window.tip = 0;
const tipTotal = document.getElementById("tip");
const orderTotal = document.getElementById("total");
function updateTip(value) {
window.tip = parseInt(value);
tipTotal.textContent = window.tip;
}
document.addEventListener("click", ({ target }) => {
if (target.className === "tips" && target.checked) {
updateTip(target.value);
}
});
document.addEventListener("load", () => {
const selectedOption = document.querySelector(".tips:checked");
updateTip(selectedOption.value);
});
First, you've got a Global variable called "tip" and an element with an id of "tip" as well. Elements with ids also become Global and so you've got a conflict in naming.
Next, you need to initially update that td in your JS and also when the tip amount changes.
let tip = 0;
const tipTotal = document.getElementById("tipAmount");
const orderTotal = document.getElementById("total");
// Initialize the table data
tipTotal.textContent = document.querySelector(".tips:checked").value;
document.addEventListener("click", function(event) {
// No need to see if it's checked because clicking
// on a radio button makes it checked and this code
// wouldn't be called if you didn't click it.
if (event.target.className === "tips") {
tipTotal.textContent = event.target.value // Update the table
}
});<div>
<input type="radio" value="0"
id="tip0" name="tip" class="tips">
<label for="tip0">$0</label>
</div>
<div>
<input type="radio" value="300"
id="tip1" name="tip" class="tips">
<label for="tip1">$3</label>
</div>
<div>
<input type="radio" value="500"
id="tip2" name="tip" class="tips" checked>
<label for="tip2">$5</label>
</div>
<table>
<tr><td id="tipAmount"></td></tr>
</table>Simply trigger a tip2 radio button click event:
document.getElementById("tip2").click();
For example:
const tipTotal = document.getElementById("tip");
const tipButton = document.getElementById("tip2");
tipButton.addEventListener("click", ({ target }) => {
if (target.className === "tips" && target.checked) {
window.tip.innerText = "$" + target.value;
} else {
return;
}
});
// activate click event on tip2 radio button
tipButton.click();<div id="tip">$0.00</div>
<div>
<input type="radio" value="5.00" id="tip2" name="tip" class="tips" />
<label for="tip2">$5</label>
</div>