将文件链接到html文档时，JavaScript文件不起作用

问题描述

所以我有一个学校项目要建立一个网站，并且我无法正确链接我的JavaScript文件。如下面的代码所示，javascript可以正常工作，它只是引用。我已经引用了如下的javascript文件：

    <script type="text/javascript" src="ContactUsPage.js"></script>

，它不起作用。如果有帮助，我正在使用Atom文本编辑器。

const checkBox = document.querySelector('.my-form input[type="checkBox"]');
const btns = document.querySelectorAll(".my-form button");

checkBox.addEventListener("change",function() {
  const checked = this.checked;
  for (const btn of btns) {
    checked ? (btn.disabled = false) : (btn.disabled = true);
  }
});

@import url("https://fonts.googleapis.com/css?family=Open+Sans:400,700");

.topnav {
  background-color: #333;
  overflow: hidden;
}

/* Style the links inside the navigation bar */
.topnav a {
  float: right;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 125.19px;
  text-decoration: none;
  font-size: 17px;
}


/* Change the color of links on hover */
.topnav a:hover {
  background-color: #ddd;
  color: black;
}

/* Add an active class to highlight the current page */
.topnav a.active {
  background-color: #4CAF50;
  color: white;
}

/* Hide the link that should open and close the topnav on small screens */
.topnav .icon {
  display: none;
}
@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

/* The "responsive" class is added to the topnav with JavaScript when the user clicks on the icon. This class makes the topnav look good on small screens (display the links vertically instead of horizontally) */
@media screen and (max-width: 600px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive a.icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}


/* Links inside the navbar */
.topnav a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;

  text-decoration: none;
}

/* The dropdown container */
.dropdown {
  float: left;
  overflow: hidden;
}

/* Dropdown button */
.dropdown .dropbtn {
  font-size: 16px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 126.4px;
  background-color: inherit;

}

.Box {
  width: 1100px;
  padding: 10px;
  border : 5px solid #000000;
  margin: 10;


}
/* Dropdown content (hidden by default) */
.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  Box-shadow: 0px 8px 16px 0px rgba(0,0.2);
  z-index: 1;
}

/* Links inside the dropdown */
.dropdown-content a {
  float: none;
  color: black;
  padding: 12px 126.4px;
  text-decoration: none;
  display: block;
  text-align: left;
}

/* Add a grey background color to dropdown links on hover */
.dropdown-content a:hover {
  background-color: #ddd;
}

/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content {
  display: block;
}
/*
body{
  background: #7f7df9;
}

.contact-us{
  width: 250px;
  background: #fff;
  padding: 50px;
  margin: 100px auto;
  border-radius: 30px;
  position: relative;
}

.title h1{
  color: #535274;
  letter-spacing: 5px;
  margin-bottom: 25px;
  text-align: center;
}

.form,.form-items{
  width: 100%;
}

.form-items .input{
  width: 100%;
  margin-bottom: 12px;
  padding: 15px 40px;
  Box-sizing: border-Box;
  background: #ebeef1;
  border: 0px;
  outline: none;
  border-radius: 30px;
}

.form-items .input.message{
  height: 125px;
  border-radius: 15px;
  margin-bottom: 30px;
  padding: 15px 15px;
  resize: none;
}

.btn{
  background: #827ffe;
  text-align: center;
  color: #fff;
  padding: 12px;
  border-radius: 25px;
  cursor: pointer;
}

.btn .fas{
  margin-left: 10px;
  font-size: 12px;
}

.form-items{
  position: relative;
}

.form-items .fas{
  position: absolute;
  top: 15px;
  left: 15px;
  color: #9a99aa;
}

.social-icons{
  position: absolute;
  bottom: -25px;
  left: 50%;
  width: 200px;
  transform: translateX(-50%);
  display: flex;
  justify-content: space-around;
}

.social-icons div{
  width: 50px;
  height: 50px;
  border-radius: 50%;
  position: relative;
  cursor: pointer;
}


.social-icons div .fab{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  color: #fff;
}

.social-icons div.facebook{
  background: #5178d9;
}

.social-icons div.twitter{
  background: #41caf6;
}

.social-icons div.google{
  background: #fb4f4f;
}
@import url("https://fonts.googleapis.com/css?family=Open+Sans:400,700");

/* RESET RULES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
:root {
  --white: #afafaf;
  --red: #e31b23;
  --bodyColor: #292a2b;
  --borderFormEls: hsl(0,0%,10%);
  --bgFormEls: hsl(0,14%);
  --bgFormElsFocus: hsl(0,7%,20%);
}

/* {
  padding: 0;
  margin: 0;
  Box-sizing: border-Box;
  outline: none;
}

a {
  color: inherit;
}
*/
input,select,textarea,button {
  font-family: inherit;
  font-size: 100%;
}

button,label {
  cursor: pointer;
}

select {
  appearance: none;
}

/* Remove native arrow on IE */
select::-ms-expand {
  display: none;
}

/*Remove dotted outline from selected option on Firefox*/
/*https://stackoverflow.com/questions/3773430/remove-outline-from-select-Box-in-ff/18853002#18853002*/
/*We use !important to override the color set for the select on line 99*/
select:-moz-focusring {
  color: transparent !important;
  text-shadow: 0 0 0 var(--white);
}

textarea {
  resize: none;
}

ul {
  list-style: none;
}

body {
  font: 18px/1.5 "Open Sans",sans-serif;
  background: var(--bodyColor);
  color: var(--white);
  margin: 1.5rem 0;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}


/* FORM ELEMENTS
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.my-form h1 {
  margin-bottom: 1.5rem;
}

.my-form li,.my-form .grid > *:not(:last-child) {
  margin-bottom: 1.5rem;
}

.my-form select,.my-form input,.my-form textarea,.my-form button {
  width: 100%;
  line-height: 1.5;
  padding: 15px 10px;
  border: 1px solid var(--borderFormEls);
  color: var(--white);
  background: var(--bgFormEls);
  transition: background-color 0.3s cubic-bezier(0.57,0.21,0.69,1.25),transform 0.3s cubic-bezier(0.57,1.25);
}

.my-form textarea {
  height: 170px;
}

.my-form ::placeholder {
  color: inherit;
  /*Fix opacity issue on Firefox*/
  opacity: 1;
}

.my-form select:focus,.my-form input:focus,.my-form textarea:focus,.my-form button:enabled:hover,.my-form button:focus,.my-form input[type="checkBox"]:focus + label {
  background: var(--bgFormElsFocus);
}

.my-form select:focus,.my-form textarea:focus {
  transform: scale(1.02);
}

.my-form *:required,.my-form select {
  background-repeat: no-repeat;
  background-position: center right 12px;
  background-size: 15px 15px;
}

.my-form *:required {
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/162656/asterisk.svg);
}

.my-form select {
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/162656/down.svg);
}

.my-form *:disabled {
  cursor: default;
  filter: blur(2px);
}


/* FORM BTNS
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.my-form .required-msg {
  display: none;
  background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/162656/asterisk.svg)
    no-repeat center left / 15px 15px;
  padding-left: 20px;
}

.my-form .btn-grid {
  position: relative;
  overflow: hidden;
  transition: filter 0.2s;
}

.my-form button {
  font-weight: bold;
}

.my-form button > * {
  display: inline-block;
  width: 100%;
  transition: transform 0.4s ease-in-out;
}

.my-form button .back {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-110%,-50%);
}

.my-form button:enabled:hover .back,.my-form button:focus .back {
  transform: translate(-50%,-50%);
}

.my-form button:enabled:hover .front,.my-form button:focus .front {
  transform: translateX(110%);
}


/* CUSTOM CHECKBox
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.my-form input[type="checkBox"] {
  position: absolute;
  left: -9999px;
}

.my-form input[type="checkBox"] + label {
  position: relative;
  display: inline-block;
  padding-left: 2rem;
  transition: background 0.3s cubic-bezier(0.57,1.25);
}

.my-form input[type="checkBox"] + label::before,.my-form input[type="checkBox"] + label::after {
  content: '';
  position: absolute;
}

.my-form input[type="checkBox"] + label::before {
  left: 0;
  top: 6px;
  width: 18px;
  height: 18px;
  border: 2px solid var(--white);
}

.my-form input[type="checkBox"]:checked + label::before {
  background: var(--red);
}

.my-form input[type="checkBox"]:checked + label::after {
  left: 7px;
  top: 7px;
  width: 6px;
  height: 14px;
  border-bottom: 2px solid var(--white);
  border-right: 2px solid var(--white);
  transform: rotate(45deg);
}


/* FOOTER
–––––––––––––––––––––––––––––––––––––––––––––––––– */
footer {
  font-size: 1rem;
  text-align: right;
  backface-visibility: hidden;
}

footer a {
  text-decoration: none;
}

footer span {
  color: var(--red);
}


/* MQ
–––––––––––––––––––––––––––––––––––––––––––––––––– */
@media screen and (min-width: 600px) {
  .my-form .grid {
    display: grid;
    grid-gap: 1.5rem;
  }

  .my-form .grid-2 {
    grid-template-columns: 1fr 1fr;
  }

  .my-form .grid-3 {
    grid-template-columns: auto auto auto;
    align-items: center;
  }

  .my-form .grid > *:not(:last-child) {
    margin-bottom: 0;
  }

  .my-form .required-msg {
    display: block;
  }
}

@media screen and (min-width: 541px) {
  .my-form input[type="checkBox"] + label::before {
    top: 50%;
    transform: translateY(-50%);
  }

  .my-form input[type="checkBox"]:checked + label::after {
    top: 3px;
  }
}

<html>
<link href="AboutUs.css" rel="stylesheet" type="text/css">

<head>
<img src="Final logo.jpg" width="106" height="106">
<Meta charset="UTF-8">
    <title>choose one already</title>
    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.5.0/css/all.css">                          also this
</head>




  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

  <div class="topnav" id="myTopnav">
    <a href="ISTwebsite.html">Home</a>

    <a href="AboutUs.html">About Us</a>
    <div class="dropdown">
      <button class="dropbtn">Stories
        <i class="fa fa-caret-down"></i>
      </button>
      <div class="dropdown-content">
        <a href="#">Jack and Jill</a>
        <a href="#">Cinderalla</a>
        <a href="#">,Mayuka</a>
      </div>
    </div>
    <a href="ContactUsPage.html" class="active" >Contact Us</a>
    <a href="javascript:void(0);" class="icon" onclick="myFunction()">
      <i class="fa fa-bars"></i>
    </a>
  </div>
  <body style="background-color:#faecca">
        <script type="text/javascript" src="ContactUsPage.js"></script>

        <form class="my-form">
          <div class="container">
            <h1>Get in touch!</h1>
            <ul>
              <li>
                <select>
                  <option selected disabled>-- Please choose an option --</option>
                  <option>Request Quote</option>
                  <option>Send Resume</option>
                  <option>Other</option>
                </select>
              </li>
              <li>
                <div class="grid grid-2">
                  <input type="text" placeholder="Name" required>
                  <input type="text" placeholder="Surname" required>
                </div>
              </li>
              <li>
                <div class="grid grid-2">
                  <input type="email" placeholder="Email" required>
                  <input type="tel" placeholder="Phone">
                </div>
              </li>
              <li>
                <textarea placeholder="Message"></textarea>
              </li>
              <li>
                <input type="checkBox" id="terms">
                <label for="terms">I have read and agreed with <a href="">the terms and conditions.</a></label>
              </li>
              <li>
                <div class="grid grid-3">
                  <div class="required-msg">required FIELDS</div>
                  <button class="btn-grid" type="submit" disabled>
                    <span class="back">
                      <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/162656/email-icon.svg" alt="">
                    </span>
                    <span class="front">SUBMIT</span>
                  </button>
                  <button class="btn-grid" type="reset" disabled>
                    <span class="back">
                      <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/162656/eraser-icon.svg" alt="">
                    </span>
                    <span class="front">RESET</span>
                  </button>
                </div>
              </li>
            </ul>
          </div>
        </form>
        <footer>
          <div class="container">

            </small>
          </div>
        </footer>
  </body>

</html>

解决方法

如果您是本地主机

---

我将确保您提供了js到html文件的正确相对路径。这往往是最常见的问题。您可能需要在引用脚本位置之前转到父文件夹，或执行任何修复相对路径的操作。

如果您正在服务器上托管它

---

我将确保您正在访问正确的端点以检索CSS和js文件。加载页面时查看Web控制台可能会有所帮助。您可能会看到FILE DNE错误。

我还将脚本导入语句移动到head中文档的顶部。并不是说它可以解决您的代码，但是它可以帮助您避免潜在的错误。否则，我不会发现您的代码有任何明显的错误。

,

我意识到我将javascript参考放在错误的区域（顶部）中，因为它在复选框出现之前就已装入。我将其移至页面底部进行了修复。