jQuery 点击时动态隐藏/显示div的内容

Question

I have 4 divs with different content. Each div should change it's content depending on the link you click.

If I have 10 divs I would have to write this 10 times:

$( "#banner2" ).hide()
$( "#banner3" ).hide();
$( "#banner4" ).hide();

    $( "#link2" ).click(function() {
    $( "#banner1, #banner3, #banner4" ).hide()
    $( "#banner2" ).fadeIn( "slow", function() {
    });
});

$( "#link1" ).click(function() {
    $( "#banner2, #banner3, #banner4" ).hide();
    $( "#banner1" ).fadeIn( "slow", function() {
    });
});

$( "#link3" ).click(function() {
    $( "#banner1, #banner2, #banner4" ).hide();
    $( "#banner3" ).fadeIn( "slow", function() {
    });
});

$( "#link4" ).click(function() {
    $( "#banner1, #banner2, #banner3" ).hide();
    $( "#banner4" ).fadeIn( "slow", function() {
    });
});

Any idea of how to make it more dynamic?

Answer 1

You can use attribute selector for this...

Where ^= means "starts with".

Notice that it is ok to use in JS ansd CSS.

 $("[id^='link']").click(function(){ $("[id^='banner']").hide() let num = this.id.replace("link","") $("#banner"+num).fadeIn("slow") })

 [id^='link']{ text-decoration: none; color: #dd4ed3; font-size: 1.2em; } [id^='link']:after{ content: " | " } [id^='banner']{ display: none; padding: 2em; margin: 2em; }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div> <a href="#" id="link1">Banner #1</a> <a href="#" id="link2">Banner #2</a> <a href="#" id="link3">Banner #3</a> <a href="#" id="link4">Banner #4</a> <a href="#" id="link5">Banner #5</a> <a href="#" id="link6">Banner #6</a> <a href="#" id="link7">Banner #7</a> <a href="#" id="link8">Banner #8</a> <a href="#" id="link9">Banner #9</a> <a href="#" id="link10">Banner #10</a> </div> <div id="banner1">Banner #1</div> <div id="banner2">Banner #2</div> <div id="banner3">Banner #3</div> <div id="banner4">Banner #4</div> <div id="banner5">Banner #5</div> <div id="banner6">Banner #6</div> <div id="banner7">Banner #7</div> <div id="banner8">Banner #8</div> <div id="banner9">Banner #9</div> <div id="banner10">Banner #10</div>

Using a common class on all links, like Taplar advised:

 $(".bannerLink").click(function(){ $("[id^='banner']").hide() let num = this.getAttribute("data-target") $("#banner"+num).fadeIn("slow") })

 .bannerLink{ text-decoration: none; color: #dd4ed3; font-size: 1.2em; }.bannerLink:after{ content: " | " } [id^='banner']{ display: none; padding: 2em; margin: 2em; }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div> <a href="#" class="bannerLink" data-target="1">Banner #1</a> <a href="#" class="bannerLink" data-target="2">Banner #2</a> <a href="#" class="bannerLink" data-target="3">Banner #3</a> <a href="#" class="bannerLink" data-target="4">Banner #4</a> <a href="#" class="bannerLink" data-target="5">Banner #5</a> <a href="#" class="bannerLink" data-target="6">Banner #6</a> <a href="#" class="bannerLink" data-target="7">Banner #7</a> <a href="#" class="bannerLink" data-target="8">Banner #8</a> <a href="#" class="bannerLink" data-target="9">Banner #9</a> <a href="#" class="bannerLink" data-target="10">Banner #10</a> </div> <div id="banner1">Banner #1</div> <div id="banner2">Banner #2</div> <div id="banner3">Banner #3</div> <div id="banner4">Banner #4</div> <div id="banner5">Banner #5</div> <div id="banner6">Banner #6</div> <div id="banner7">Banner #7</div> <div id="banner8">Banner #8</div> <div id="banner9">Banner #9</div> <div id="banner10">Banner #10</div>

Or more flexiblility using child index retreived from .index() ...

 $(".bannerLink").click(function(){ $(".banner").hide() let num = $(this).index() $(".banner").eq(num).fadeIn("slow") })

 .bannerLink{ text-decoration: none; color: #dd4ed3; font-size: 1.2em; }.bannerLink:after{ content: " | " }.banner{ display: none; padding: 2em; margin: 2em; }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div> <a href="#" class="bannerLink">Banner #1</a> <a href="#" class="bannerLink">Banner #2</a> <a href="#" class="bannerLink">Banner #3</a> <a href="#" class="bannerLink">Banner #4</a> <a href="#" class="bannerLink">Banner #5</a> <a href="#" class="bannerLink">Banner #6</a> <a href="#" class="bannerLink">Banner #7</a> <a href="#" class="bannerLink">Banner #8</a> <a href="#" class="bannerLink">Banner #9</a> <a href="#" class="bannerLink">Banner #10</a> </div> <div class="banner">Banner #1</div> <div class="banner">Banner #2</div> <div class="banner">Banner #3</div> <div class="banner">Banner #4</div> <div class="banner">Banner #5</div> <div class="banner">Banner #6</div> <div class="banner">Banner #7</div> <div class="banner">Banner #8</div> <div class="banner">Banner #9</div> <div class="banner">Banner #10</div>

In short... There is many ways you can do it... ;)