目前，以下代码会跟踪ID为text的textarea的字数和字符数。
但是，我希望能够计算多个文本区域的结果。我怎样才能做到这一点？
counter = function() {
var value = $('#text').val();
if (value.length == 0) {
$('#wordCount').html(0);
$('#totalChars').html(0);
$('#charCount').html(0);
$('#charCountNoSpace').html(0);
return;
}
var regex = /\s+/gi;
var wordCount = value.trim().replace(regex, ' ').split(' ').length;
var totalChars = value.length;
var charCount = value.trim().length;
var charCountNoSpace = value.replace(regex, '').length;
$('#wordCount').html(wordCount);
$('#totalChars').html(totalChars);
$('#charCount').html(charCount);
$('#charCountNoSpace').html(charCountNoSpace);
};
$(document).ready(function() {
$('#count').click(counter);
$('#text').change(counter);
$('#text').keydown(counter);
$('#text').keypress(counter);
$('#text').keyup(counter);
$('#text').blur(counter);
$('#text').focus(counter);
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="result">
Words: <span id="wordCount">0</span><br/> Total Characters (including trails): <span id="totalChars">0</span><br/> Characters (excluding trails): <span id="charCount">0</span><br/> Characters (excluding all spaces): <span id="charCountNoSpace">0</span>
</div>
答案 0 :(得分：2)
您需要将ID更改为类，以便将插件附加到多个元素。将您的代码转换为插件。试试以下内容：
counter = function() {
if ($(this).next('div.result').length) {
$(this).next('div.result').remove();
}
var output = '<div class="result">Words: <span class="wordCount">0</span><br/> Total Characters (including trails): <span class="totalChars">0</span><br/> Characters (excluding trails): <span class="charCount">0</span><br/> Characters (excluding all spaces): <span class="charCountNoSpace">0</span></div>';
$(this).after(output);
var value = $(this).val();
if (value.length == 0) {
$(this).next('div.result').find('.wordCount').html(0);
$(this).next('div.result').find('.totalChars').html(0);
$(this).next('div.result').find('.charCount').html(0);
$(this).next('div.result').find('.charCountNoSpace').html(0);
return;
}
var regex = /\s+/gi;
var wordCount = value.trim().replace(regex, ' ').split(' ').length;
var totalChars = value.length;
var charCount = value.trim().length;
var charCountNoSpace = value.replace(regex, '').length;
$(this).next('div.result').find('.wordCount').html(wordCount);
$(this).next('div.result').find('.totalChars').html(totalChars);
$(this).next('div.result').find('.charCount').html(charCount);
$(this).next('div.result').find('.charCountNoSpace').html(charCountNoSpace);
};
$(document).ready(function() {
$('#count').click(counter);
$('.string-example,.regex-example').on('change keyup focusout blur', counter);
});<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Highlight Within Textarea</title>
<link href="https://fonts.googleapis.com/css?family=Open+Sans:400,700|Droid+Sans+Mono" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!-- highlight-within-textarea CSS/JS -->
<link href="https://lonekorean.github.io/highlight-within-textarea/jquery.highlight-within-textarea.css" rel="stylesheet">
<script src="https://lonekorean.github.io/highlight-within-textarea/jquery.highlight-within-textarea.js"></script>
<!-- custom styles for highlight-within-textarea -->
<style>
.hwt-container {
background-color: #f8f9fa;
}
.hwt-content {
width: 760px;
height: 100px;
padding: 20px;
border: 1px solid #adb5bd;
color: inherit;
font: 18px/25px 'Droid Sans Mono', sans-serif;
}
.hwt-input:focus {
outline-color: #495057;
}
.hwt-content mark {
border-radius: 3px;
background-color: #d0bfff;
}
.hwt-content mark.red {
background-color: #ffc9c9;
}
.hwt-content mark.blue {
background-color: #a3daff;
}
.hwt-content mark.yellow {
background-color: #ffec99;
}
</style>
<!-- general styles to make this page look decent -->
<style>
* {
box-sizing: border-box;
}
body {
max-width: 800px;
margin: 40px auto;
padding: 0 20px;
font: 18px/1.4 'Open Sans', sans-serif;
color: #495057;
background-color: #f1f3f5;
}
a {
display: inline-block;
margin-bottom: 5px;
padding: 10px 30px;
border-radius: 5px;
color: #f8f9fa;
background-color: #495057;
text-decoration: none;
}
section {
margin-top: 60px;
}
code {
padding: 0 5px;
font-family: 'Droid Sans Mono', sans-serif;
font-size: 16px;
background-color: #dee2e6;
}
script {
display: block;
margin-top: 10px;
padding-left: 15px;
border-left: 5px solid #adb5bd;
background-color: #e9ecef;
white-space: pre-wrap;
font: 14px/1.5 'Droid Sans Mono', sans-serif;
}
</style>
</head>
<body>
<h1>Highlight Within Textarea</h1>
<p>Some demos and code snippets for using the plugin. Edit textareas to see the real-time highlighting. View page source to see the CSS.</p>
<p>
<a href="https://github.com/lonekorean/highlight-within-textarea/tree/master">Go to GitHub repo</a>
<a href="https://www.npmjs.com/package/highlight-within-textarea">Go to npm package</a>
</p>
<section>
<h2>String</h2>
<p>Note that this is case-insensitive.</p>
<textarea class="string-example">Potato potato tomato potato.</textarea>
<script>
$('.string-example').highlightWithinTextarea({
highlight: 'potato'
});
</script>
</section>
<section>
<h2>RegExp</h2>
<p>Don't forget the <code>g</code> (find all) and <code>i</code> (case-insensitive) flags if you need them.</p>
<textarea class="regex-example">Dog, cat, chicken, goose. Dogs, cats, chickens, geese.</textarea>
<script>
$('.regex-example').highlightWithinTextarea({
highlight: /dogs?|cats?|g(oo|ee)se/gi
});
</script>
</section>
<section>
<h2>Array of Two Numbers (Range)</h2>
<p>An array of exactly two numbers is treated as a range. Highlighting starts at the first character index (inclusive) and ends at the second character index (exclusive).</p>
<textarea class="range-example">abcdefgh</textarea>
<script>
$('.range-example').highlightWithinTextarea({
highlight: [2, 6]
});
</script>
</section>
<section>
<h2>Array of Other Things</h2>
<p>You can highlight multiple things, using any types mentioned here, with an array.</p>
<textarea class="array-example">apple watermelon banana orange mango</textarea>
<script>
$('.array-example').highlightWithinTextarea({
highlight: [
'orange',
/ba(na)*/gi, [0, 5]
]
});
</script>
</section>
<section>
<h2>Function</h2>
<p>You can use a function for custom logic. It can return any of the types mentioned here. Return anything falsey (<code>false</code>, <code>undefined</code>, etc.) to indicate no highlighting. The current textarea input is provided to it for convenience.</p>
<textarea class="function-example">Sun Mon Tue Wed Thu Fri Sat :) <-- remove the smiley...</textarea>
<script>
function getSmileyDayString(input) {
const dayStrings = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];
if (input.indexOf(':)') !== -1) {
let dayIndex = (new Date()).getDay();
return dayStrings[dayIndex];
} else {
// no smiley, no highlighting
return false;
}
}
$('.function-example').highlightWithinTextarea({
highlight: getSmileyDayString
});
</script>
</section>
<section>
<h2>Custom Object (with Class Name)</h2>
<p>Any type mentioned here can be put in an object wrapper with <code>highlight</code> and <code>className</code> properties. This lets you set CSS classes in the highlight markup for custom styling, such as changing the highlight color.</p>
<textarea class="class-example">Here's a blueberry. There's a strawberry. Surprise, it's a banananana!</textarea>
<script>
$('.class-example').highlightWithinTextarea({
highlight: [{
highlight: 'strawberry',
className: 'red'
},
{
highlight: 'blueberry',
className: 'blue'
},
{
highlight: /ba(na)*/gi,
className: 'yellow'
}
]
});
</script>
</section>
</body>
</html>
答案 1 :(得分：0)
可以通过两种方式完成：
以下内容将为文本区域提供id，您可以在其中获取值。
$(textarea).each(function(){
console.log($(this).id);
});