为什么一个功能起作用而另一个功能不起作用？ （JavaScript）的

时间：2018-06-19 07:00:15

标签： javascript html css

我正在练习一个项目，我正在尝试使用模块模式，因为我想尽可能多地避免全局变量。

我的autoslide和下拉菜单工作正常。但是当我点击主题时，子菜单会显示，同时我的图像会滑动。

为什么我的子菜单会突然消失？

var slideShow = (function () {
    var slideImages = document.getElementsByClassName("slide");
    var leftSide = document.getElementById("arrow-left");
    var rightSide = document.getElementById("arrow-right");
    var slideBullets = document.getElementsByClassName("bullets");
    var current = 0;

    function reset() {
        for (let i = 0; i < slideImages.length; i++) {
            slideImages[i].style.display = 'none';
            slideBullets[i].classList.remove("clicked");
        }
    };

    function showImages() {
        for (let i = 0; i < slideImages.length; i++) {
            slideImages[0].style.display = 'block';
            slideBullets[current].classList.add("clicked");
        }
    };

    function arrowSlide() {
        leftSide.addEventListener("click", function () {
            reset();
            if (current === 0) {
                current = slideImages.length;
            }
            slideImages[current - 1].style.display = 'block';       
            current--;
            slideBullets[current].classList.add("clicked");
        });

        rightSide.addEventListener("click", function () {
            reset();
            if (current === slideImages.length - 1) {
                current = - 1;
            }
            slideImages[current + 1].style.display = 'block';         
            current++;
            slideBullets[current].classList.add("clicked");
        });
    };

    function showBulletsImages() {
        for (let i = 0; i < slideBullets.length; i++) {
            slideBullets[i].addEventListener("click", function () {
                reset();
                slideImages[i].style.display = 'block';
                slideBullets[i].classList.add("clicked");
                current = i;
            });
        }
    };

    function autoSlide() {
        setInterval(function () {
            rightSide.click();
            slideBullets[current].classList.add('clicked')
        }, 2000);
    };

    return {
        reset: reset(),
        showImages: showImages(),
        arrowSlide: arrowSlide(),
        showBulletsImages: showBulletsImages(),
        autoSlide: autoSlide()
    };
})();

var toggleMenu = (function () {
    var mainTopics = document.getElementById("maintopics");

    mainTopics.addEventListener("click", function (e) {
        e.preventDefault();
        e.stopImmediatePropagation();
        mainTopics.classList.toggle("show");
    });

    document.addEventListener("click", function () {
        mainTopics.classList.remove("show");
    });

    return {
        toggleMenu: toggleMenu()
    };
})();
body {
    margin: 0;
}

li, a{
    text-decoration: none;
    list-style-type: none;
    text-decoration-line: none;
    color: black;
}

/*main-menu*/
#mainmenu {
    position: relative;
}

#mainmenu ul {
    margin: 0;
    padding: 0;
}

#mainmenu li {
    display: inline-block;
}

#mainmenu a {
    display: block;
    width: 100px;
    padding: 10px;
    border: 1px solid;
    text-align: center;
}

/*sub-topics*/
#subtopics {
    position: absolute;
    display: none;
    margin-top: 10px;
    width: 100%;
    left: 0;
}

#maintopics.show #subtopics {
    display: block;
}

#subtopics ul {
    margin: 0;
    padding: 0;
}

#subtopics li {
    display: block;
}

#subTopics a {
    text-align: left;
}

/*columns*/
#column1, #column2, #column3 {
    position: relative;
    float: left;
    left: 125px;
    margin: 0px 5px 0px 0px;
}

/*hover underline*/
#mainmenu li:hover {
    text-decoration: underline;
}

/*slideshow*/
#slideshow {
    position: relative;
    width: 100%;
    height: 100%;
}

#slide1 {
    background-image: url(https://preview.ibb.co/mV3TR7/1.jpg);
}

#slide2 {
    background-image: url(https://preview.ibb.co/bSCBeS/2.jpg);
}

#slide3 {
    background-image: url(https://preview.ibb.co/kgG9Yn/3.jpg);
}

.slide {
    background-repeat: no-repeat;
    background-position: center;
    background-size: 800px 400px;
    width: 800px;
    height: 400px;
    margin: auto;
    margin-top: 40px;
}

.slide-contain {
    position: absolute;
    left: 50%;
    bottom: 50%;
    transform: translate3d(-50%,-50%,0);
    text-align: center;
}

.slide-contain span {
    color: white;
}

/*arrow*/
.arrow {
    position: absolute;
    cursor: pointer;
    top: 200px;
    width: 0;
    height: 0;
    border-style: solid;
}

.arrow:hover {
    background-color: #e0dede;
    transition: background-color 0.6s ease;
}


#arrow-left {
    position: absolute;
    border-width: 30px 40px 30px 0px;
    border-color: transparent gray transparent transparent;
    left: 0;
    margin-left: 300px;
}


#arrow-right {
    border-width: 30px 0px 30px 40px;
    border-color: transparent transparent transparent gray;
    right: 0;
    margin-right: 300px;
}

/*bullets*/
#slidebullet {
    position: relative;
    top: -30px;
    text-align: center;
}

.bullets {
    display: inline-block;
    background-color: gray;
    width: 15px;
    height: 15px;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.6s ease;
}

.clicked {
    background-color: #ff0000;
}
<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title></title>
    <link rel="stylesheet" type="text/css" href="index.css" />
</head>
<body>
    <header></header>
    <nav>
        <div id="mainmenu">
            <ul>
                <li><a href="">Logo</a></li>
                <li><a href="">Home</a></li>
                <li id="maintopics"><a href="">Topics</a>
                    <div id="subtopics">
                        <div id="column1" class="columns">
                            <ul>
                                <li><a href="">example1</a></li>
                                <li><a href="">example2</a></li>
                            </ul>
                        </div>
                    </div>
                </li>
            </ul>
        </div>
    </nav>
    <div id="slideshow">

        <div id="slide1" class="slide">
            <div class="slide-contain">
                <span>Image One</span>
            </div>
        </div>

        <div id="slide2" class="slide">
            <div class="slide-contain">
                <span>Image Two</span>
            </div>
        </div>

        <div id="slide3" class="slide">
            <div class="slide-contain">
                <span>Image Three</span>
            </div>
        </div>

        <div id="slidebullet">
            <div id="bullet1" class="bullets"></div>
            <div id="bullet2" class="bullets"></div>
            <div id="bullet3" class="bullets"></div>
        </div>

        <div id="arrow-left" class="arrow"></div>
        <div id="arrow-right" class="arrow"></div>
    </div>
    <script src="jquery.js"></script>
    <script src="index.js"></script>
    <script>

    </script>
</body>
</html>

2 个答案:

答案 0 :(得分：1)

事实是，当您点击mainTopics时隐藏documment。

当您在document处click触发arrow-right时，您点击了rightSide.click();：arrow-right。 （document就像其他一切一样，是文档的一部分。）

这会在hides上触发点击事件，因此mainTopics event.target

一种解决方案是在document点击事件中使用arrow-right，并将其视为left-arrow元素（或 if (e.target.id != 'arrow-right') { mainTopics.classList.remove("show"); } ，如果您愿意，它是易于修改）

if statement

作为旁注：根据您的条件，您可以用更多不同的方式编写e.target.id != 'arrow-right' && mainTopics.classList.remove("show")

e.target.id != 'arrow-right' ? mainTopics.classList.remove("show") : ""

或

var slideShow = (function () { var slideImages = document.getElementsByClassName("slide"); var leftSide = document.getElementById("arrow-left"); var rightSide = document.getElementById("arrow-right"); var slideBullets = document.getElementsByClassName("bullets"); var current = 0; function reset() { for (let i = 0; i < slideImages.length; i++) { slideImages[i].style.display = 'none'; slideBullets[i].classList.remove("clicked"); } }; function showImages() { for (let i = 0; i < slideImages.length; i++) { slideImages[0].style.display = 'block'; slideBullets[current].classList.add("clicked"); } }; function arrowSlide() { leftSide.addEventListener("click", function () { reset(); if (current === 0) { current = slideImages.length; } slideImages[current - 1].style.display = 'block'; current--; slideBullets[current].classList.add("clicked"); }); rightSide.addEventListener("click", function () { reset(); if (current === slideImages.length - 1) { current = - 1; } slideImages[current + 1].style.display = 'block'; current++; slideBullets[current].classList.add("clicked"); }); }; function showBulletsImages() { for (let i = 0; i < slideBullets.length; i++) { slideBullets[i].addEventListener("click", function () { reset(); slideImages[i].style.display = 'block'; slideBullets[i].classList.add("clicked"); current = i; }); } }; function autoSlide() { setInterval(function () { rightSide.click(); slideBullets[current].classList.add('clicked') }, 2000); }; return { reset: reset(), showImages: showImages(), arrowSlide: arrowSlide(), showBulletsImages: showBulletsImages(), autoSlide: autoSlide() }; })(); var toggleMenu = (function () { var mainTopics = document.getElementById("maintopics"); mainTopics.addEventListener("click", function (e) { e.preventDefault(); e.stopImmediatePropagation(); mainTopics.classList.toggle("show"); }); document.addEventListener("click", function (e) { if (e.target.id != 'arrow-right') { mainTopics.classList.remove("show"); } }); return { toggleMenu: toggleMenu() }; })();

请参阅下面的代码段。如果有效，请告诉我。

body {
    margin: 0;
}

li, a{
    text-decoration: none;
    list-style-type: none;
    text-decoration-line: none;
    color: black;
}

/*main-menu*/
#mainmenu {
    position: relative;
}

#mainmenu ul {
    margin: 0;
    padding: 0;
}

#mainmenu li {
    display: inline-block;
}

#mainmenu a {
    display: block;
    width: 100px;
    padding: 10px;
    border: 1px solid;
    text-align: center;
}

/*sub-topics*/
#subtopics {
    position: absolute;
    display: none;
    margin-top: 10px;
    width: 100%;
    left: 0;
}

#maintopics.show #subtopics {
    display: block;
}

#subtopics ul {
    margin: 0;
    padding: 0;
}

#subtopics li {
    display: block;
}

#subTopics a {
    text-align: left;
}

/*columns*/
#column1, #column2, #column3 {
    position: relative;
    float: left;
    left: 125px;
    margin: 0px 5px 0px 0px;
}

/*hover underline*/
#mainmenu li:hover {
    text-decoration: underline;
}

/*slideshow*/
#slideshow {
    position: relative;
    width: 100%;
    height: 100%;
}

#slide1 {
    background-image: url(https://preview.ibb.co/mV3TR7/1.jpg);
}

#slide2 {
    background-image: url(https://preview.ibb.co/bSCBeS/2.jpg);
}

#slide3 {
    background-image: url(https://preview.ibb.co/kgG9Yn/3.jpg);
}

.slide {
    background-repeat: no-repeat;
    background-position: center;
    background-size: 800px 400px;
    width: 800px;
    height: 400px;
    margin: auto;
    margin-top: 40px;
}

.slide-contain {
    position: absolute;
    left: 50%;
    bottom: 50%;
    transform: translate3d(-50%,-50%,0);
    text-align: center;
}

.slide-contain span {
    color: white;
}

/*arrow*/
.arrow {
    position: absolute;
    cursor: pointer;
    top: 200px;
    width: 0;
    height: 0;
    border-style: solid;
}

.arrow:hover {
    background-color: #e0dede;
    transition: background-color 0.6s ease;
}


#arrow-left {
    position: absolute;
    border-width: 30px 40px 30px 0px;
    border-color: transparent gray transparent transparent;
    left: 0;
    margin-left: 300px;
}


#arrow-right {
    border-width: 30px 0px 30px 40px;
    border-color: transparent transparent transparent gray;
    right: 0;
    margin-right: 300px;
}

/*bullets*/
#slidebullet {
    position: relative;
    top: -30px;
    text-align: center;
}

.bullets {
    display: inline-block;
    background-color: gray;
    width: 15px;
    height: 15px;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.6s ease;
}

.clicked {
    background-color: #ff0000;
}
<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title></title>
    <link rel="stylesheet" type="text/css" href="index.css" />
</head>
<body>
    <header></header>
    <nav>
        <div id="mainmenu">
            <ul>
                <li><a href="">Logo</a></li>
                <li><a href="">Home</a></li>
                <li id="maintopics"><a href="">Topics</a>
                    <div id="subtopics">
                        <div id="column1" class="columns">
                            <ul>
                                <li><a href="">example1</a></li>
                                <li><a href="">example2</a></li>
                            </ul>
                        </div>
                    </div>
                </li>
            </ul>
        </div>
    </nav>
    <div id="slideshow">

        <div id="slide1" class="slide">
            <div class="slide-contain">
                <span>Image One</span>
            </div>
        </div>

        <div id="slide2" class="slide">
            <div class="slide-contain">
                <span>Image Two</span>
            </div>
        </div>

        <div id="slide3" class="slide">
            <div class="slide-contain">
                <span>Image Three</span>
            </div>
        </div>

        <div id="slidebullet">
            <div id="bullet1" class="bullets"></div>
            <div id="bullet2" class="bullets"></div>
            <div id="bullet3" class="bullets"></div>
        </div>

        <div id="arrow-left" class="arrow"></div>
        <div id="arrow-right" class="arrow"></div>
    </div>
    <script src="jquery.js"></script>
    <script src="index.js"></script>
    <script>

    </script>
</body>
</html>
url: '/HeatMapCoordinates'

答案 1 :(得分：0)

对于mainTopics，您已将click事件附加到两个DOM元素。

  1. mainTopics
  2. 文件

    3. 点击后，由于show DOM点击事件

    ，会添加mainTopics课程

    由于event bubbling，document抓取了移除click类的show事件。

    因此，同时添加和删除show类。

    mainTopics.addEventListener("click", function (e) {
        e.preventDefault();
        e.stopImmediatePropagation();
        mainTopics.classList.toggle("show");
    });

    document.addEventListener("click", function () {
        mainTopics.classList.remove("show");
    });
相关问题
最新问题