我正在嘗試制作一個互動式評級組件。我不知道如何在選擇評級后在 span 元素上回傳結果。
當我在按鈕上輸入評級時：
提交評分后：
在那里我想回傳結果。
我在 forEach 函式中嘗試使用 if 陳述句，但不知道如何在 span 元素上回傳結果。
const allBtns = document.querySelectorAll('.btn');
allBtns.forEach(btn => {
btn.addEventListener('click', function onClick() {
btn.style.backgroundColor = 'orange';
})
});
function ShowAndHide() {
let y = document.querySelector('.ratingbox');
let x = document.querySelector('.thankyou');
if (x.style.display == 'none') {
y.style.display = 'none';
x.style.display = 'block';
} else {
x.style.display = 'none';
}
}<div class="ratingbox">
<div class="backgroundstar">
<img src="images/icon-star.svg" alt="" class="star">
</div>
<div class="writing">
<h1>How did we do?</h1>
<p>Please let us know how we did with your support request. All feedback is appreciated to help us improve our offering! </p>
</div>
<div class="flexbox">
<ul>
<li><button class="btn"><p id="num">1</p></button></li>
<li><button class="btn"><p id="num">2</p></button></li>
<li><button class="btn"><p id="num">3</p></button></li>
<li><button class="btn"><p id="num">4</p></button></li>
<li><button class="btn"><p id="num">5</p></button></li>
</ul>
<button class="submit" onclick="ShowAndHide()">SUBMIT</button>
</div>
</div>
<div class="thankyou " style="display: none; ">
<div class="message ">
<img src="https://via.placeholder.com/50" alt=" " class="img ">
<div class="selected ">
<span id="rating "></span>
</div>
<div class="greeting ">
<h2>Thank you!</h2>
<p id="appreciate ">We appreciate you taking the thime to give a rating.<br> If you ever need more support, don't hesitate to <br> get in touch!
</p>
</div>
</div>
</div>uj5u.com熱心網友回復：
使用正確的工具來完成作業。
使用單選按鈕來管理您的評分并根據您的喜好設定標簽樣式。然后使用 CSS 來處理隱藏和顯示。讓 JavaScript 去操作 DOM。
請記住，ID必須是唯一的。一旦它們不再是唯一的，它們就不再是 id。document.getElementById如果 ID 不是唯一的，諸如此類的事情就會中斷。
/*Get out radio buttons based on the name attribue*/
const allBtns = document.querySelectorAll('[name=rating]');
/*Add the event listener*/
allBtns.forEach(btn => {
btn.addEventListener('click', function onClick() {
/*Update the text using the value of the radio button*/
document.querySelector("#rating").innerHTML = `Thanks for rating us ${this.value}!`;
})
});
function ShowAndHide() {
/*Toggle the hide class on the appropriate boxes*/
document.querySelector('.ratingbox').classList.toggle("hide");
document.querySelector('.thankyou').classList.toggle("hide");;
}/*Hide the radion buttons*/
.flexbox input {display:none;}
/*Give some buttonish styling to the check boxes */
.flexbox label {
display:block;
border: 1px blue solid;
border-radius: 50%;
font-size: 1.2em;
font-weight:bold;
text-align:center;
line-height:30px;
height: 30px;
width:30px;
margin-bottom: 1em;
}
/*Change the styling of the checked label*/
/*Note the use of the adjacent sibling cominator */
.flexbox :checked label {
background-color: orange;
}
/*Generic class to handle showing and hiding*/
.hide {
display:none;
}<div class="ratingbox">
<div class="backgroundstar">
<img src="images/icon-star.svg" alt="" class="star">
</div>
<div class="writing">
<h1>How did we do?</h1>
<p>Please let us know how we did with your support request. All feedback is appreciated to help us improve our offering! </p>
</div>
<div class="flexbox">
<ul>
<!-- Using radio buttons , that will be hidden with associated labels -->
<li><input type="radio" name="rating" id="rtr1" value="1"><label for="rtr1">1</label></li>
<li><input type="radio" name="rating" id="rtr2" value="2"><label for="rtr2">2</label></li>
<li><input type="radio" name="rating" id="rtr3" value="3"><label for="rtr3">3</label></li>
<li><input type="radio" name="rating" id="rtr4" value="4"><label for="rtr4">4</label></li>
<li><input type="radio" name="rating" id="rtr5" value="5"><label for="rtr5">5</label></li>
</ul>
<button class="submit" onclick="ShowAndHide()">SUBMIT</button>
</div>
</div>
<div class="thankyou hide">
<div class="message ">
<img src="https://via.placeholder.com/50" alt=" " class="img ">
<div class="selected ">
<span id="rating">Bob</span>
</div>
<div class="greeting ">
<h2>Thank you!</h2>
<p id="appreciate ">We appreciate you taking the thime to give a rating.<br> If you ever need more support, don't hesitate to <br> get in touch!
</p>
</div>
</div>
</div>uj5u.com熱心網友回復：
只是一個替代解決方案，您可以rating僅通過 Javascript 為每個按鈕設定值，并且對現有代碼的更改最少。
這樣，它就獨立于p. 它還省去了閱讀p標簽的麻煩，因為您可能需要根據設計將其替換為其他內容。
下面的 Javascript 片段可以與您發布的 HTML 一起使用而無需更改。
完整示例（使用下面的按鈕運行它以進行演示）：
const allBtns = document.querySelectorAll('.btn');
const resultSpan = document.querySelector(".selected span")
allBtns.forEach((btn, i) => {
btn.addEventListener('click', function onClick() {
btn.style.backgroundColor = 'orange';
// Customize the output text here
// It displays in Success screen
resultSpan.innerText = `You have rated ${i 1}`;
})
});
function ShowAndHide() {
let y = document.querySelector('.ratingbox');
let x = document.querySelector('.thankyou');
if (x.style.display == 'none') {
y.style.display = 'none';
x.style.display = 'block';
} else {
x.style.display = 'none';
}
}<div class="ratingbox">
<div class="backgroundstar">
<img src="images/icon-star.svg" alt="" class="star">
</div>
<div class="writing">
<h1>How did we do?</h1>
<p>Please let us know how we did with your support request. All feedback is appreciated to help us improve our offering! </p>
</div>
<div class="flexbox">
<ul>
<li><button class="btn"><p>1</p></button></li>
<li><button class="btn"><p>2</p></button></li>
<li><button class="btn"><p>3</p></button></li>
<li><button class="btn"><p>4</p></button></li>
<li><button class="btn"><p>5</p></button></li>
</ul>
<button class="submit" onclick="ShowAndHide()">SUBMIT</button>
</div>
</div>
<div class="thankyou " style="display: none; ">
<div class="message ">
<img src="https://via.placeholder.com/50" alt=" " class="img ">
<div class="selected ">
<span id="rating "></span>
</div>
<div class="greeting ">
<h2>Thank you!</h2>
<p id="appreciate ">We appreciate you taking the thime to give a rating.<br> If you ever need more support, don't hesitate to <br> get in touch!
</p>
</div>
</div>
</div>但正如其他評論所提到的，建議您id為每個分配一個不同的標簽p，或者根本不分配，id因為無論如何都不需要在代碼中讀取這些標簽。
uj5u.com熱心網友回復：
您的代碼存在多個問題。主要問題是您對多個元素使用相同的id, num, 這是無效的。改為將這些更改id為class，如下所示：
<ul>
<li><button class="btn"><p class="num">1</p></button></li>
<li><button class="btn"><p class="num">2</p></button></li>
<li><button class="btn"><p class="num">3</p></button></li>
<li><button class="btn"><p class="num">4</p></button></li>
<li><button class="btn"><p class="num">5</p></button></li>
</ul>
這樣做之后，獲取最近選擇的按鈕的一種方法是找到嵌套.num在您的按鈕中的單擊事件監聽器，例如var rating = parseInt(btn.querySelector(".num").textContent)
以下是您可以如何通過對當前代碼進行最少的更改來做到這一點：
const allBtns = document.querySelectorAll('.btn');
var currentRating = null;
allBtns.forEach(btn => {
btn.addEventListener('click', function onClick() {
btn.style.backgroundColor = 'orange';
currentRating = parseInt(btn.querySelector(".num").textContent)
})
});
function ShowAndHide() {
if (currentRating){
alert(currentRating);
}
let y = document.querySelector('.ratingbox');
let x = document.querySelector('.thankyou');
if (x.style.display == 'none') {
y.style.display = 'none';
x.style.display = 'block';
} else {
x.style.display = 'none';
}
}
這是一個 JsFiddle，它可以執行此操作并提醒所選評級： https ://jsfiddle.net/eg4Ly0nd/
注意：我建議在每個li按鈕中使用隱藏的復選框輸入，并添加事件偵聽器代碼以檢查與按鈕關聯的選定輸入并取消選中其他輸入。那么您不需要currentRating我的解決方案中包含的全域變數；您可以找到選中的輸入。我只是這樣寫的，以便在仍然提供解決方案的同時對您提供的代碼進行最小的更改。
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/534738.html
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