使用jQuery .each()具有动态限制的字符计数器 [英] Character Counter with a dynamic limit using jQuery .each()

问题描述

此问题是使用类的jQuery字符计数器的扩展.. >

我想在我的textarea字段中添加一个data-content="####"，然后使用jQuery提取数值并将其应用于字符计数器限制器.

<textarea id="field1" class="input-xlarge limitChars" data-content="2000" rows="2" name="field1">该字段的上限为2000个字符

<textarea id="field2" class="input-xlarge limitChars" data-content="1000" rows="2" name="field2">该字段的限制为1000个字符

<textarea id="field3" class="input-xlarge limitChars" data-content="1500" rows="2" name="field3">，这将是1500个字符.

从另一个问题的解决方案(请参阅下面的解决方案)中，我假设我需要从DOM中提取数据内容，然后将其应用于目标.我只是不知道如何从数据内容中提取价值，因此不胜感激.

$(document).ready(function(){
    $(".limitChars").each(function() {
        $(this).counter({
            goal: 500
        });
    });
});

================================================ ======
随着出现的扩展对话框，我认为显示我最终得到的结果可能会有所帮助:

HTML

<textarea id="field1" class="input-xlarge" counter-limit="2000" rows="2" name="field1"> this field would have a limit of 2000 chars

JavaScript/jQuery

$("[data-counter-limit]").each(function() {
      var $this = $(this), limit = +$(this).data("counter-limit");
      $this.counter({
        goal: parseInt(limit,10)
        //  goal: limit
      });
});

解决方案

使用 .data() 方法从data-属性中提取值.然后使用 parseInt(string, radix) 将其转换为数字

$(document).ready(function(){
    $('.limitChars').each(function() {
        var self = $(this);
        self.counter({
            goal: parseInt(self.data('content'),10)
        });
    });
});

This question is an extension of jQuery Character Counter using class?.

I would like to add a data-content="####" to my textarea field and then use jQuery to pull out the numerical value and apply that to the character counter limiter.

<textarea id="field1" class="input-xlarge limitChars" data-content="2000" rows="2" name="field1"> this field would have a limit of 2000 chars

<textarea id="field2" class="input-xlarge limitChars" data-content="1000" rows="2" name="field2"> this field would have a limit of 1000 chars

<textarea id="field3" class="input-xlarge limitChars" data-content="1500" rows="2" name="field3"> and this one would be 1500 chars.

From my other question's solution (see solution below), I'm assuming I'd need to pull out the data-content from the DOM and then apply that to the goal. I just don't know how to pull out the value from data-content and would appreciate some help.

$(document).ready(function(){
    $(".limitChars").each(function() {
        $(this).counter({
            goal: 500
        });
    });
});

=====================================================
With the extended dialog that occurred, I thought it might be helpful to show what I actually ended up with:

HTML

<textarea id="field1" class="input-xlarge" counter-limit="2000" rows="2" name="field1"> this field would have a limit of 2000 chars

JavaScript/jQuery

$("[data-counter-limit]").each(function() {
      var $this = $(this), limit = +$(this).data("counter-limit");
      $this.counter({
        goal: parseInt(limit,10)
        //  goal: limit
      });
});

解决方案

Use .data() method to extract values from data- attributes. Then use parseInt(string, radix) to convert it to a number

$(document).ready(function(){
    $('.limitChars').each(function() {
        var self = $(this);
        self.counter({
            goal: parseInt(self.data('content'),10)
        });
    });
});

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