Javascript 更改 url onclick

Question

我想修改一个url根据点击切换按钮（输入checkbox）

我无法更改 url 点击时的价格。我希望在第二次单击时，url（按钮的）将 return 这个初始值 (url1).

价格正确...点击时，变化很好，但 url 不好 :/

感谢您的帮助

function show() {

var x = document.getElementById("price");
    if (x.innerHTML === "59€") {
        x.innerHTML = "89€";
    } else {
        x.innerHTML = "59€";
}

var x = document.getElementById("url1").href;
    if (x.href === "url1") {
        document.getElementById("url1").href = "url2";
    } else {
        document.getElementById("url1").href = "url";
    }
}

body{font-family:arial, 'sans serif';}
.btn{
background:#000;
padding:10px;
color:#fff;
text-decoration:none;
font-family:arial, 'sans serif';
margin:0 auto;
width:150px;
display:block;
text-align:center;
border-radius:10px;
}
.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

/* Hide default HTML checkbox */
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

/* The slider */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input:checked + .slider {
  background-color: #2196F3;
}

input:focus + .slider {
  box-shadow: 0 0 1px #2196F3;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}
h3{
text-align:center;
}

 <p>Click here</p>
<label class="switch">
  <input onclick="show()" type="checkbox">
  <span class="slider round"></span>
</label>


<h3 class="price-presta" id="price">59€</h3>

<a class="btn" id="url1" href="url1">url link button</a>
<!-- url does not change on second click like the price -->

Answer 1

有2个问题。首先，这里：

var x = document.getElementById("url1").href;
if (x.href === "url1") {

您将 href 放入 x 变量，然后您尝试检查 x 变量的 href - 但字符串没有 href 属性。只需检查 x 本身即可。

其次，.href 属性将 return link 的 完整路径 。例如，在 Stack Snippet 中，它 returns https://stacksnippets.net/url1。使用 getAttribute 代替：

function show() {
  const price = document.getElementById("price");
  price.textContent = price.textContent === "59€" ? "89€" : "59€";
  
  const anchor = document.getElementById("url1");
  anchor.href = anchor.getAttribute('href') === 'url1' ? 'url2' : 'url';
}

body {
  font-family: arial, 'sans serif';
}

.btn {
  background: #000;
  padding: 10px;
  color: #fff;
  text-decoration: none;
  font-family: arial, 'sans serif';
  margin: 0 auto;
  width: 150px;
  display: block;
  text-align: center;
  border-radius: 10px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}


/* Hide default HTML checkbox */

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}


/* The slider */

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input:checked+.slider {
  background-color: #2196F3;
}

input:focus+.slider {
  box-shadow: 0 0 1px #2196F3;
}

input:checked+.slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}


/* Rounded sliders */

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

h3 {
  text-align: center;
}

<p>Click here</p>
<label class="switch">
  <input onclick="show()" type="checkbox">
  <span class="slider round"></span>
</label>


<h3 class="price-presta" id="price">59€</h3>

<a class="btn" id="url1" href="url1">url link button</a>
<!-- url does not change on second click like the price -->

Answer 2

您已经将 url 设置为变量“x”。所以 if-condition 必须直接在字符串上而不是元素上：

//[...]
var x = document.getElementById("url1").href;
if (x === "url1") {
    document.getElementById("url1").href = "url2";
} 
//[...]

Answer 3

完美！谢谢

刚刚！ : 'url' ？ 'url2' : 'url'; VS 'url1' ？ 'url2' : 'url'; :)

function show() {
  const price = document.getElementById("price");
  price.textContent = price.textContent === "59€" ? "89€" : "59€";
  
  const anchor = document.getElementById("url1");
  anchor.href = anchor.getAttribute('href') === 'url' ? 'url2' : 'url';
}

function show() {
  const price = document.getElementById("price");
  price.textContent = price.textContent === "59€" ? "89€" : "59€";
  
  const anchor = document.getElementById("url1");
  anchor.href = anchor.getAttribute('href') === 'url' ? 'url2' : 'url';
}

body {
  font-family: arial, 'sans serif';
}

.btn {
  background: #000;
  padding: 10px;
  color: #fff;
  text-decoration: none;
  font-family: arial, 'sans serif';
  margin: 0 auto;
  width: 150px;
  display: block;
  text-align: center;
  border-radius: 10px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}


/* Hide default HTML checkbox */

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}


/* The slider */

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input:checked+.slider {
  background-color: #2196F3;
}

input:focus+.slider {
  box-shadow: 0 0 1px #2196F3;
}

input:checked+.slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}


/* Rounded sliders */

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

h3 {
  text-align: center;
}

<p>Click here</p>
<label class="switch">
  <input onclick="show()" type="checkbox">
  <span class="slider round"></span>
</label>


<h3 class="price-presta" id="price">59€</h3>

<a class="btn" id="url1" href="url1">url link button</a>
<!-- url does not change on second click like the price -->

Javascript 更改 url onclick

Javascript change url onclick

javascript

onclick

getelementbyid