正则表达式匹配在带双引号的字符串上失败
[英]Regex match fails on string with double quotes
问题描述
I have a string that dynamically comes from another document as follows; 
我有一个动态地来自另一个文档的字符串，如下所示；
"<!DOCTYPE html>
<html dir="ltr"><head><title>Preview</title></head>
<body>
<p>test</p>
<p><img alt="" height="299" src="http://172.0.0.1/Administration/YDImages/cap.JPG" width="696"></p>
</body>
</html>"
I use this string as follows; 我使用这个字符串如下：
var html = stringAbove;
var reg = html.match(/<body[^>]*>(.*)<\/body>/);
var newDocument = "<p>My new Texts and styles</p>"; //replace inside body with my new code
var newer = html.replace(reg[1],newDocument);
doc.write(newer);
I've discovered that html.match returns null if the string inside html variable as it is above, while debugging to see how could I make this regex work on developer tools, I've changed starting and ending double quotes of the string to single quotes, so it worked. 我发现如果html变量中的字符串如上所示，则html.match返回null ，在调试以查看如何使此正则表达式在开发人员工具上工作时，我已将字符串的双引号和双引号改为单引号引号，因此有效。 Then I changed all double quotes to single quotes and try regex function but it doesn't work. 然后，我将所有双引号更改为单引号，并尝试使用regex函数，但是它不起作用。 Please, help me to get this regex work properly. 请帮我使此正则表达式正常工作。
1 个解决方案
解决方案1
0 2017-04-03 13:21:08
You can try something like this: 您可以尝试如下操作：
/<body>(.*?)(?=<\/body>)/
This will start matching from <body> till the character followed by </body> . 这将从<body>匹配直到字符跟</body>开始匹配。
Also since you are receiving HTMLString, you will not have multiple body s and hence using match[0] 另外，由于您正在接收HTMLString，因此不会有多个body ，因此使用match[0]
var s = '<!DOCTYPE html><html dir="ltr"><head><title>Preview</title></head><body><p>test</p><p><img alt="" height="299" src="http://172.0.0.1/Administration/YDImages/cap.JPG" width="696"></p></body></html>'; var regex = /<body>(.*?)(?=<\\/body>)/; var match = s.match(regex) console.log(match) var html = match[0].replace("<body>", "") document.querySelector('.content').innerHTML = html
img{ border: 1px solid gray; }
<div class="content"></div>
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