如何让用户通过单击文本来增加字体大小？

Question

I've been trying to figure how to create an idea I had the other day for awhile now and can't seem to get it to work due to being a bit of noob still. 我一直试图弄清楚如何创建我前几天有过一个想法，由于仍然有些菜鸟而似乎无法使它起作用。

Anyway, to the point, I am trying to create as the title says, a paragraph where the user can simply click on the text / paragraph and have the font size increase each time. 无论如何，至此，我正试图按照标题所说创建一个段落，用户可以在该段落中简单地单击文本/段落并每次增加字体大小。

I was able to get a working form where I could put in a multiple choice box and have the users change size with that, but that simply isn't what I want to do.. 我能够得到一个工作表，可以在其中放置一个多选框，并让用户以此来更改大小，但这根本不是我想要的。

I was thinking it would look something like this: 我以为它看起来像这样：

<script type="text/javascript" language="javascript">
do
    {
    if (user-clicks) increase font size;
    else keep current font size;    
    }
while (font-size < 4em)
</script>

Can anyone more experienced please help me getting this to work or at least put me on a path where I can more successfully figure it out myself? 任何经验丰富的人都可以帮助我解决这个问题，或者至少让我走上一条可以自己成功解决的道路吗？ Thanks in advance for any help! 在此先感谢您的帮助！

Answer 1

<html>
<head>
<script language="javascript">

function resizeText(multiplier) {
    multiplyText(multiplier, document.getElementById('myContent'));    
}

function multiplyText(multiplier, txtobj) {
    //keep current font size
    if (txtobj.style.fontSize == '') {
        txtobj.style.fontSize = "100%";
    }
    //keep current font size
    if (multiplier == 0) {
        txtobj.style.fontSize = "100%";
    } 
    else { //get only the number part of the fontsize
    txtobj.style.fontSize = parseFloat(txtobj.style.fontSize) + multiplier + "%";
    }
}


</script>
</head>

<body>
<p id="myContent">
 <a href="javascript:resizeText(10);"> Increase font</a></p>
</body>
</html>

Answer 2

Working Code with JQuery: 使用JQuery的工作代码：

 <html>
    <head>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
    <script type="text/javascript">
    $(document).ready(function(e) {
        var gFont=1;
    $('.fontAuto').click(function(e) {
        if(gFont<4){
                gFont=gFont+0.5;
        $('.fontAuto').css('font-size',gFont+'em');
        }else{
            gFont =1;
            $('.fontAuto').css('font-size','1em');
        }
    });

    });
    </script>
    <style type='text/css'>

    .fontAuto{
        font-size:1em;
    }
    </style>
    </head>
    <body>
    <p class="fontAuto">Text For testing</p>

    </body>
    </html>

Answer 3

Giving you a very short & simple answer- 给您一个非常简短的答案-

<p id=p1 style="font-size:25">
    click <a href="javascript:document.getElementById('p1').style.fontSize=50">here</a> to enlarge.
</p>

In case you want to do it on click at any part of the <p>...</p> tag use- 如果您想点击<p>...</p>标记的任何部分来执行此操作，请使用-

<p id=p1 style="font-size:25" onclick="this.style.fontSize=50">
    click to enlarge.
</p>

如何让用户通过单击文本来增加字体大小？

问题描述

3 个解决方案

解决方案1
3 已采纳 2013-10-07 17:48:55

解决方案2
0 2013-10-07 17:58:06

解决方案3
0 2013-10-07 19:02:55

Customize it as you wish. 根据需要自定义它。

如何让用户通过单击文本来增加字体大小？

问题描述

3 个解决方案

解决方案1 3 已采纳 2013-10-07 17:48:55

解决方案2 0 2013-10-07 17:58:06

解决方案3 0 2013-10-07 19:02:55

Customize it as you wish. 根据需要自定义它。

解决方案1
3 已采纳 2013-10-07 17:48:55

解决方案2
0 2013-10-07 17:58:06

解决方案3
0 2013-10-07 19:02:55