问题描述
我正在尝试像Stackoverflow那样制作我自己的可降价的textarea。目标是允许人们在textarea中键入 ** blah blah ** 并将div中的输出设为< span style = font-weight：bold;> blah blah< / span> 。
i'm trying to make my own markdown-able textarea like Stackoverflow has done. The goal is to allow people to type **blah blah** in a textarea and have the output in a div be <span style="font-weight:bold;">blah blah</span>.
我在使用javascript查找和替换时遇到问题使用HTML的**星号。
I'm having trouble with the javascript to find and replace to the **asterisks with the HTML.
这里是一个让派对开始的jsfiddle：
here's a jsfiddle which has gotten the party started: http://jsfiddle.net/trpeters1/2LAL4/14/
这里的JS只是为了告诉你我在哪里：
here's the JS on that just to show you where I'm at:
$(document.body).on('click', 'button', function() {
var val=$('textarea').val();
var bolded=val.replace(/\**[A-z][0-9]**/gi, '<span style="font-weight:bold;">"'+val+'" </span>');
$('div').html(bolded);
});
和HTML ...
<textarea></textarea>
<div></div><button type="button">Markdownify</button>
任何想法都将不胜感激！
any thoughts would be greatly appreciated!
谢谢，
蒂
推荐答案
一方面，你的正则表达式被打破了。你可能想要更像这样的东西：
Your regex is broken, for one thing. You probably want something more like:
/\*\*[A-z0-9]+\*\*/gi
* 是一个正则表达式中的特殊字符。如果要匹配文字 * ，则需要使用 \ 进行转义。
The * is a special character in regular expressions. If you want to match against a literal *, then you need to escape it with \.
例如：
然而，即使有了这个改变，在你到达你真正想要的地方之前还有一个公平的方法。例如，如果文本区域包含粗体和非粗体文本的混合，则您的示例将不起作用。
However, even with this change there's still a fair ways to go before you get to where you really want to be. For instance, your example will not work if the text area contains a mix of bold and non-bold text.
这篇关于Markdown将双星号转换为javascript中的粗体文本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！