HTML JavaScript 基于计时器的条件 href link

Question

我正在尝试根据条件将用户重定向到特定页面。 If Timer still 运行 open booknow.html if timer expired open booknowcode.html

伪代码

计时器还在运行

用户点击“立即预订”按钮如果条件： a) 如果计时器仍然运行 -> 将用户发送到 booknowcode.html 页面 b) 如果计时器过期 -> 将用户发送到 booknow.html 页面

// Set the date we're counting down to
var countDownDate = new Date("June 30, 2021 09:17:25").getTime();

// Update the count down every 1 second
var x = setInterval(function() {

  // Get today's date and time
  var now = new Date().getTime();

  // Find the distance between now and the count down date
  var distance = countDownDate - now;

  // Time calculations for days, hours, minutes and seconds
  var days = Math.floor(distance / (1000 * 60 * 60 * 24));
  var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
  var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
  var seconds = Math.floor((distance % (1000 * 60)) / 1000);

  // Output the result in an element with id="timer"
  document.getElementById("timer").innerHTML = days + "d " + hours + "h " +
    minutes + "m " + seconds + "s " + "Discount 15%";

  // If the count down is over, write Expired text 
  if (distance < 0) {
    clearInterval(x);
    document.getElementById("timer").innerHTML = "EXPIRED";
  }
  //===if timer still running then redirect to dicount page (distance more than zero) Start ===
  let link;

  if (distance <= 0) {
    link = "booknow.html";
  } else {
    link = "booknowcode.html";
  }
  document.getElementById("demo").innerHTML = link;
  //===if timer still running then redirect to dicount page (distance more than zero) End ===

}, 1000);

<div class="timer-button" id="conditional-button">
  <p id="timer"></p>
  <a href="booknow.html">
    <button class="btn btn-info" type="button" onclick="">Book Now</button>
  </a>
</div>

<p id="demo"></p>

那么如何根据定时器条件将booknow.html替换为booknowcode.html呢？

Answer 1

您应该设置 href 而不是 innerHTML。

document.querySelector("#conditional-button a").href = link;

Answer 2

像这样

版本 1

删除按钮并使其成为 link
给link一个ID
计时器到期时更改为document.getElementById("link").href = "booknowcode.html";

// Set the date we're counting down to
var countDownDate = new Date("June 30, 2021 09:17:25").getTime();
// Get today's date and time
var now = new Date().getTime();

// Find the distance between now and the count down date
var distance = countDownDate - now;


// Update the count down every 1 second
var x = setInterval(function() {

  // Get today's date and time
  now = new Date().getTime();

  // Find the distance between now and the count down date
  distance = countDownDate - now;

  // Time calculations for days, hours, minutes and seconds
  var days = Math.floor(distance / (1000 * 60 * 60 * 24));
  var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
  var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
  var seconds = Math.floor((distance % (1000 * 60)) / 1000);

  // Output the result in an element with id="timer"
  document.getElementById("timer").innerHTML = days + "d " + hours + "h " +
    minutes + "m " + seconds + "s " + "Discount 15%";

// If the count down is over, write Expired text 
  if (distance < 0) {
    clearInterval(x);
    document.getElementById("timer").innerHTML = "EXPIRED";

  //===if timer stops, the link changes  ===

    document.getElementById("link").href = "booknowcode.html";
  }




}, 1000);

<div class="timer-button" id="conditional-button">
  <p id="timer"></p>
  <a href="booknow.html" class="btn btn-info" id="link">Book Now</button>
</div>

版本 2

删除按钮周围的 link 并使其成为按钮
点击按钮时添加一个事件监听器
在点击处理程序中测试距离
改变document.getElementById("demo").innerHTML = link; location = link 当运行

// Set the date we're counting down to
var countDownDate = new Date("June 30, 2021 09:17:25").getTime();
// Get today's date and time
var now = new Date().getTime();

// Find the distance between now and the count down date
var distance = countDownDate - now;


// Update the count down every 1 second
var x = setInterval(function() {

  // Get today's date and time
  now = new Date().getTime();

  // Find the distance between now and the count down date
  distance = countDownDate - now;

  // Time calculations for days, hours, minutes and seconds
  var days = Math.floor(distance / (1000 * 60 * 60 * 24));
  var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
  var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
  var seconds = Math.floor((distance % (1000 * 60)) / 1000);

  // Output the result in an element with id="timer"
  document.getElementById("timer").innerHTML = days + "d " + hours + "h " +
    minutes + "m " + seconds + "s " + "Discount 15%";

  // If the count down is over, write Expired text 
  if (distance < 0) {
    clearInterval(x);
    document.getElementById("timer").innerHTML = "EXPIRED";
  }
  //===if timer still running then redirect to dicount page (distance more than zero) Start ===
  let link;



}, 1000);
document.getElementById("but").addEventListener("click", function() {
  if (distance <= 0) {
    link = "booknow.html";
  } else {
    link = "booknowcode.html";
  }
  document.getElementById("demo").innerHTML = link;
  // change this to 
  // location  = link; 
  // when running

  //===if timer still running then redirect to dicount page (distance more than zero) End ===
})

<div class="timer-button" id="conditional-button">
  <p id="timer"></p>
  <button class="btn btn-info" id="but" type="button">Book Now</button>
</div>

<p id="demo"></p>

Answer 3

只需将您的新 link 应用到 <a>（我给它一个数据属性以使我们的替换准确）

if (distance <= 0) {
  // ....
  document.querySelector('a[data-rel=book-link]').setAttribute('href', link)

我不确定为什么锚标记内有一个按钮，所以我删除了该按钮并将 css 应用于 a，它看起来应该是一样的。

// Set the date we're counting down to
//var countDownDate = new Date("June 30, 2021 09:17:25").getTime();
countDownDate = new Date().getTime() + 10000;
// Update the count down every 1 second
var x = setInterval(function() {

  // Get today's date and time
  var now = new Date().getTime();

  // Find the distance between now and the count down date
  var distance = countDownDate - now;

  // Time calculations for days, hours, minutes and seconds
  var days = Math.floor(distance / (1000 * 60 * 60 * 24));
  var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
  var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
  var seconds = Math.floor((distance % (1000 * 60)) / 1000);

  // Output the result in an element with id="timer"
  document.getElementById("timer").innerHTML = days + "d " + hours + "h " +
    minutes + "m " + seconds + "s " + "Discount 15%";
  let link;

  // If the count down is over, write Expired text 
  if (distance <= 0) {
    clearInterval(x);
    document.getElementById("timer").innerHTML = "EXPIRED";
    link = "booknow.html";
    document.querySelector('a[data-rel=book-link]').setAttribute('href', link)

  //===if timer still running then redirect to dicount page (distance more than zero) Start ===
  } else {
    link = "booknowcode.html";
  }
  document.getElementById("demo").innerHTML = link;
  //===if timer still running then redirect to dicount page (distance more than zero) End ===

}, 1000);

<div class="timer-button" id="conditional-button">
  <p id="timer"></p>
  <a data-rel='book-link' href="booknow.html" class="btn btn-info">Book Now</a>
</div>

<p id="demo"></p>

HTML JavaScript 基于计时器的条件 href link

HTML JavaScript Conditional href link based on timer

html

javascript

if-statement

href

button