我有一个textarea，它将包含用户输入的代码，我想获取该代码并使用jQuery扫描它以获取名为settings的自定义标记内的值，然后将此值添加到输入中，以便用户能够更改设置标记内的值而不触及代码。我能够获取值并将它们添加到输入中，但我无法使用新值更新代码。
HTML CODE：
<div id='tab-1'>
<textarea id='template-code' cols='67' rows='27'></textarea>
<button id='submit-code'>Submit Code</button>
</div>
<div id='tab-2' class='unactive'>
<form id='settings-form' method='POST'>
<div id='result'></div>
<button id='update-code'>Update Code</button>
</form>
</div>
CSS代码：
.unactive {
display: none
}
jQuery CODE：
$('#template-code').change(function (){
var $that = $(this),
template_code = $that.val(),
code = '',
new_data = '',
text = '',
newCode = '';
// Extract settings from the theme and add them to #result
$(document).on('click', '#submit-code', function (){
$('#tab-1').addClass('unactive');
$('#tab-2').removeClass('unactive');
$(template_code).find('setting').each(function (i){
var $this = $(this),
setting_std = $this.text(),
setting_id = $this.attr('id');
code += '<input id="'+setting_id+'" name="'+setting_id+'" type="text" value="'+setting_std+'"><br>';
});
if(code !== ''){
$('#result').html(code);
}
});
// Update old data with the new one
$(document).on('click', '#update-code', function (){
new_data = $( "#settings-form" ).serializeArray();
$.each( new_data, function( i, new_field ) {
var start_key = "id='"+new_field.name+"'>",
end_key = '</setting>',
start = template_code.indexOf(start_key),
end = template_code.indexOf(end_key);
text = template_code.substring(start + start_key.length, end);
// THE PROBLEM IS HERE
// I want the variable template_code to contains the new value not the old one so I used replace but it seems that it doesn't work
template_code.replace(text, new_field.value);
});
$('#template-code').val(template_code);
$('#tab-1').removeClass('unactive');
return false;
});
});
这是将在textarea中添加的主题代码示例：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html>
<html b:version='2' class='v2' expr:dir='data:blog.languageDirection' xmlns='http://www.w3.org/1999/xhtml' xmlns:b='http://www.google.com/2005/gml/b' xmlns:data='http://www.google.com/2005/gml/data' xmlns:expr='http://www.google.com/2005/gml/expr'>
<head>
<b:include data='blog' name='all-head-content'/>
<link href='http://fonts.googleapis.com/css?family=Open+Sans+Condensed:300,300italic,700' rel='stylesheet' type='text/css'/>
<link href='http://fonts.googleapis.com/css?family=Lora:400,400italic,700,700italic' rel='stylesheet' type='text/css'/>
<link href='https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css' rel='stylesheet'/>
<title><data:blog.pageTitle/></title>
<div id='option-panel' style='display:none!important'>
<setting id='post_thumbnail'>http://lorempixel.com/640/300/</setting>
<setting id='search_icon'>on</setting>
</div>
</head>
<body>
</body>
</html>
要了解我的问题，请输入此JsFiddle并复制上面的代码，然后将其放入textarea并单击提交代码，您将获得两个输入，这些输入的内容来自这两个标记：
<setting id='post_thumbnail'>http://lorempixel.com/640/300/</setting>
<setting id='search_icon'>on</setting>
我希望当用户更改输入值并单击“更新代码”以更改整个代码中设置标记的值。
答案 0 :(得分：2)
试试这个，看看它是否适合您：
<强> HTML
<div id='tab-1'>
<textarea id='template' cols='67' rows='27'></textarea>
<button id='submit'>Submit Code</button>
</div>
<div id='tab-2'>
<form id='settings-form' method='POST'>
<div id='result'></div>
<button id='update'>Update Code</button>
</form>
</div>
<强> JavaScript的：
function wrap(data) {
var string = '';
var i, l;
string += "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\r\n";
string += "<!DOCTYPE html>\r\n";
string += "<html b:version='2' class='v2' expr:dir='data:blog.languageDirection' xmlns='http://www.w3.org/1999/xhtml' xmlns:b='http://www.google.com/2005/gml/b' xmlns:data='http://www.google.com/2005/gml/data' xmlns:expr='http://www.google.com/2005/gml/expr'>\r\n";
string += " <head>\r\n";
string += " <b:include data='blog' name='all-head-content'/>\r\n";
string += " <link href='http://fonts.googleapis.com/css?family=Open+Sans+Condensed:300,300italic,700' rel='stylesheet' type='text/css'/>\r\n";
string += " <link href='http://fonts.googleapis.com/css?family=Lora:400,400italic,700,700italic' rel='stylesheet' type='text/css'/>\r\n";
string += " <link href='https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css' rel='stylesheet'/>\r\n";
string += " <title><data:blog.pageTitle/></title>\r\n";
string += " </head>\r\n";
string += " <body>\r\n";
string += " <div id='option-panel' style='display:none!important'>\r\n";
for (i = 0, l = data.length; i < l; i++)
string += " " + data[i].toString() + "\r\n";
string += " </div>\r\n";
string += " </body>\r\n";
string += "</html>\r\n";
return string;
}
$("#submit").on('click', function() {
var virtual = document.createElement("div");
var temp = '';
virtual.innerHTML = $("#template").val();
$(virtual).find('setting').each(function(i) {
var $this = $(this),
setting_std = $this.text(),
setting_id = $this.attr('id');
temp += '<input id="' + setting_id + '" name="' + setting_id + '" type="text" value="' + setting_std + '"><br>';
});
if (temp !== '')
$('#result').html(temp);
});
$("#update").on('click', function(event) {
var temp = [];
event.preventDefault();
$("#result").find("input").each(function() {
temp.push("<setting id=\"" + this.id.toString() + "\">" + this.value.toString() + "</setting>");
});
$("#template").val(wrap(temp));
});
我相信你做的是什么？即使你正在使用jQuery，我认为你最终使它变得比它更难。我使用了一个虚拟节点来快速/轻松地从提交时textarea中找到并提取设置标签（我认为是沮丧和肮脏的。）。
由于它干扰了快速测试，我删除了样式和诸如此类的东西，并且您需要针对用户输入应用适当的健全性检查/验证。
编辑：更新了包含贫民窟包装功能的答案，以阐明这一概念。我不建议按原样使用它，而是使用真正的模板，这需要超出此问题范围的工作。
编辑后的最新JSFiddle：http://jsfiddle.net/zo3hh2ye/6/
答案 1 :(得分：1)
这是代码的另一个版本。我将新值保存在数组中，然后用textarea文本中的现有值替换它们。试一试，看看是否能解决您的问题。
脚本：
/*======= Container =======*/
#container {
display: flex;
flex-direction: row;
min-height: 100vh;
}
#content-wrap {
width: 100%;
}
/*======= Sāna izvēlne / header =======*/
header {
min-height: 100vh;
width: 150px;
margin: 0;
background-color: red;
flex: 0 0 150px;
}
.header-position {
width: inherit;
height: 100vh;
position: fixed;
display: flex;
flex-direction: column;
justify-content: space-between;
}
nav {
background-color: #ffffff;
}
nav ul {
padding: 0;
margin: 0;
}
nav li,
a {
text-decoration: none;
list-style-type: none;
text-align: right;
font-size: 1em;
color: black;
}
.logo {
background: url("../images/AG.svg");
background-size: contain;
background-repeat: no-repeat;
width: 80px;
}
/*======= Banneris =======*/
.banner-container {
background-image: url("../images/lp-background.jpg");
background-size: cover;
background-repeat: no-repeat;
width: 100%;
height: 300px;
clear: right;
}
.banner {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100%;
}
.banner h1 {
color: white;
font-family: 'Roboto', sans-serif;
text-transform: uppercase;
font-weight: bold;
letter-spacing: 0.4em;
border: solid 10px white;
padding: 20px 30px;
}
/*======= Par mums =======*/
#about {
width: 100%;
height: 300px;
background-color: pink;
}
#about .first,
.second {
width: 50%;
height: 100%;
display: inline-block;
}
#about .first {} #about .second {
float: right;
}
.about-picture {
height: 200px;
width: 200px;
margin: 50px 50px;
border-radius: 150px;
border: solid 4px rgb(246, 243, 199);
}
.about-picture.right {
float: right;
}
img.right {
float: right;
}HTML模板：
<div id="container">
<header>
<div class="header-position">
<img class="logo" src="./images/AG.svg" alt="AG Logo"></img>
<nav>
<ul>
<li><a href="#">Sākums</a>
</li>
<li><a href="#">Attēli</a>
</li>
<li><a href="#">Kontakti</a>
</li>
<li><a href="#">Par mums</a>
</li>
</ul>
</nav>
<a href="mailto:">Sazinies ar mums</a>
</div>
</header>
<div id="content-wrap">
<div class="banner-container">
<span class="banner"><h1>Whatever</h1></span>
</div>
<div id="about">
<div class="first">
<img class="about-picture left" src="./images/lp-background.jpg" alt="" />
</div>
<div class="second">
<img class="about-picture right" src="./images/lp-background.jpg" alt="" />
</div>
</div>
</div>我无法替换＆＃39; on＆＃39;在你提供的模板中，不确定它是否与某些保留关键字有关，但其他一切都正常。