使用javascript从开始标记到结束标记中删除选定的html元素，并带有值

Question

I'm trying to parse HTML and want to remove all <select>...</select> from string which is from TextArea1 and want to show output (Plain Text) in TextArea2.我正在尝试解析 HTML 并希望从来自 TextArea1 的字符串中删除所有<select>...</select>并希望在 TextArea2 中显示输出（纯文本）。 Code is given below:代码如下：

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <meta charset="utf-8" />
</head>
<body>
    <textarea id="TextArea1" rows="10" cols="100"></textarea><br />
    <textarea id="TextArea2" rows="10" cols="100"></textarea><br />
    <input id="Submit1" onclick="parsehtml()" type="submit" value="submit" />
    <script>
        function parsehtml() {
            let value = document.getElementById("TextArea1").value
                .split('\n')
                .filter(item => item.startsWith('<span>'))
                .map(item => item.replace(/<\/?[^>]+>/ig, " ").trim()).join(' ')

            document.getElementById("TextArea2").value = value
        }
    </script>
</body>
</html>

In my TextArea1 I have code like:在我的 TextArea1 中，我有如下代码：


<span>Span 1</span>
<select>
<option>opt 01</option>
<option>opt 02</option>
</select>
<span>Span 2</span>
<select>
<option>opt 11</option>
<option>opt 12</option>
</select>

I'm getting output like我得到的输出像

Span 1 Span 2

Code is working if I have all in a seperate line.如果我将所有内容都放在单独的行中，则代码正在运行。 But not working if I have all codes in a single line eg.但如果我在一行中包含所有代码，则不起作用，例如。

<select><option>opt 1</option></select><span>Span 1</span>...

I want to remove all <select> element with all of its values from start tag to end tag.我想删除所有<select>元素及其从开始标记到结束标记的所有值。 and want to output from dynamic generated HTML code并希望从动态生成的 HTML 代码中输出

Hello <select class="..." onchange="..."><option>opt 01</option><option>opt 02</option></select><span>World</span> Hello <select><option>opt 11</option><option>opt 12</option></select> <span>Again</span>

//need output like below

//Hello World Hello Again

Answer 1

You can create a div , put TextArea1 's content into that div as HTML, use Javascript's DOM support to remove select s and copy the innerHTML into TextArea2 .您可以创建一个div ，将TextArea1的内容作为 HTML 放入该div中，使用 Javascript 的 DOM 支持删除select并将innerHTML复制到TextArea2 。

 function replaceSelect() { var div = document.createElement("div"); //created a div div.innerHTML = document.getElementById("TextArea1").value; //copied the source text as HTML into the div for (let select of div.querySelectorAll("select")) select.remove(); //Lopped select tags inside the div and removed them document.getElementById("TextArea2").innerText = div.innerHTML; //Copied the result into the target }

 <textarea id="TextArea1"><select><option>opt 1</option></select><span>Span 1</span>...<select><option>opt 1</option></select><span>Span 2</span></textarea> <textarea id="TextArea2"></textarea> <input type="button" value="Remove Select" onclick="replaceSelect()">

使用javascript从开始标记到结束标记中删除选定的html元素，并带有值

问题描述

1 个解决方案

解决方案1
0 已采纳 2020-11-16 10:04:14

使用javascript从开始标记到结束标记中删除选定的html元素，并带有值

问题描述

1 个解决方案

解决方案1 0 已采纳 2020-11-16 10:04:14

解决方案1
0 已采纳 2020-11-16 10:04:14