JavaScript/jQuery:显示 DIV 直到用户停止在文本框中输入

JavaScript/jQuery: Show DIV until user stops typing in Textbox

我在我的网站上使用了一些文本框(输入类型=文本),我有一个 div,它是隐藏的(显示:none)。

现在我希望用户在其中一个文本框中输入一些文本,恰好在那一刻,div 应该出现几秒钟然后隐藏,当用户停止添加文本时。 div 还应等到用户停止悬停 div。我真的很努力,但还是没能正确完成。

这是一个 JSFIDDLE 示例来说明我的意思:

var InfoBoxHovered = false;

$(".TextBox1").on("input", function() {
    $(".InfoBox").fadeIn();
    setTimeout(function () {
        $(".InfoBox").fadeOut();
    }, 3000);
 });

$(".TextBox2").on("input", function() {
    $(".InfoBox").fadeIn();
    if (!InfoBoxHovered){
        setTimeout(function () {
            $(".InfoBox").fadeOut();
        }, 3000);
    }
 });

$(".InfoBox").mouseenter(function(){
    InfoBoxHovered = true;
})
$(".InfoBox").mouseleave(function(){
    InfoBoxHovered = false;
})

// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - //

//The INFOBOX-DIV should APPEAR, when the user enters some text
//The INFOBOX-DIV should DISAPPEAR, 3 SECONDS AFTER THE USER STOPPED ENTERING TEXT
//The Infobox-Div should not disappear after 3 seconds and appear again - it should stay until the user finished entering text and then wait 3 seconds before it fades out
//The InfoBox-div should be visible, as long as the user hovers the div and should then fade out, if the 3 seconds are over
.Main{
    background-color: lightgrey; min-width: 100%; min-height: 200px; text-align: center;
}
.Header{
    font-family: Arial; color: red; font-size: 18px; font-weight: bold;
}
.InfoBox{
    position: fixed; left:0; right:0;background: rgba(0,0,0,.75); z-index: 20; bottom: 20px;
    margin: 0 auto; width: 500px; height: 80px; border-radius: 4px; text-align: center;
    color: white; padding: 15px; font-family: Arial; display: none;
}
<script src="//code.jquery.com/jquery-1.11.2.min.js"></script>
<div class="Main">
    <br/>
    <span class="Header">Input-Fields</span>
    <br/><br/>
    <input type="text" name="title1" placeholder="Enter Some Text" class="TextBox TextBox1"/>
    <input type="text" name="titlew" placeholder="Enter Some Text" class="TextBox TextBox2"/>
</div>

<div class="InfoBox">
    Information
</div>

我尽了最大努力使用不同的功能,例如 "delay" 或 "setTimeout",甚至每隔几秒用 "SetInterval" 检查一次...但没有任何效果。我试图在 JSFiddle 的 JavaScript-Field 中解释更多细节。

提前致谢。

你所要做的就是将 setTimeout 存储在一个变量中,然后 清除 需要时的超时:

mouseenter 替换为 hover,但无论哪种方式都有效。

注意
.InfoBox 元素最初是不可见的,因此当它出现在鼠标指针下方时,它不会悬停直到鼠标指针移动。

// declare timer variable which holds the timeout:
var timer;

$(".TextBox1").on("input", function() {
    $(".InfoBox").fadeIn();
    // clear the timer if it's already set:
    clearTimeout(timer);
    timer = setTimeout(function () {
        $(".InfoBox").fadeOut();
    }, 3000);
 });

$(".TextBox2").on("input", function() {
    $(".InfoBox").fadeIn();
    // clear the timer if it's already set:
    clearTimeout(timer);
    timer = setTimeout(function () {
        $(".InfoBox").fadeOut();
    }, 3000);
 });

$(".InfoBox").hover(function(){
    // clear the timer on hover, so that the box won't disapear:
    clearTimeout(timer);
}, function(){
    // set the timer again when mouse is outside of the box:
    timer = setTimeout(function () {
        $(".InfoBox").fadeOut();
    }, 3000);
});
.Main{
    background-color: lightgrey; min-width: 100%; min-height: 200px; text-align: center;
}
.Header{
    font-family: Arial; color: red; font-size: 18px; font-weight: bold;
}
.InfoBox:hover{
    background: rgba(0,0,0,.9);
}
.InfoBox{
    position: fixed; left:0; right:0;background: rgba(0,0,0,.75); z-index: 20; bottom: 20px;
    margin: 0 auto; width: 500px; height: 80px; border-radius: 4px; text-align: center;
    color: white; padding: 15px; font-family: Arial; display: none;
}
<script src="//code.jquery.com/jquery-1.11.2.min.js"></script>
<div class="Main">
    <br/>
    <span class="Header">Input-Fields</span>
    <br/><br/>
    <input type="text" name="title1" placeholder="Enter Some Text" class="TextBox TextBox1"/>
    <input type="text" name="titlew" placeholder="Enter Some Text" class="TextBox TextBox2"/>
</div>

<div class="InfoBox">
    Information
</div>

不要在 mouseenter 上使用,而是像这样使用更改:

$(".InfoBox").change(function(){
    InfoBoxHovered = true;
});

示例 jsfiddle:http://jsfiddle.net/rec2Ltsm/