Javascript .replace() / 正则表达式，代码为字符串
我正在尝试“删除”（只需将其替换为“”）以下字符串：
<script type="text/javascript">
document.createElement("img").src="http://www.google.com"
</script>
从以下字符串：
<SCRIPT LANGUAGE=JavaScript>
var PAswf = "_ADPATH_[%SWF File%]";
var advurl = "_ADCLICK_";
var PAadvurl = escape(advurl);
var PAwidth = "[%Width%]";
var PAheight = "[%Height%]";
var wmValue = "_ADDCP(wm)_";
if (!wmValue)wmValue = "opaque";
var PAwmode = wmValue;
document.write('<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"');
document.write(' WIDTH="'+ PAwidth +'" HEIGHT="'+ PAheight +'">');
document.write('<PARAM NAME=movie VAL'+'UE="' + PAswf + '?clickTag='+ PAadvurl +'"><PARAM NAME=quality VALUE=high><PARAM NAME=wmode VALUE='+ PAwmode +'>');
document.write('<EMBED sr'+'c="'+PAswf + '?clickTag='+ PAadvurl +'" quality=high wmode='+ PAwmode);
document.write(' swLiveConnect=TRUE WIDTH="'+ PAwidth +'" HEIGHT="'+ PAheight +'"');
document.write(' TYPE="application/x-shockwave-flash">');
document.write('</EMBED></OBJECT>');
</SCRIPT>
<script type="text/javascript">
document.createElement("img").src="http://www.google.com"
</script>
如您所见，该字符串位于代码块的底部，但这并不重要。我已将第一个字符串存储为变量 codeString，并尝试了以下操作。
// code refers to the bigger code string
code.replace(/codeString/gm, "");
好像不太匹配啊我确信我做错了什么，但我搜索了大约一个小时却一无所获。有什么想法吗？
I'm trying to "remove" (just replace it with "") the following String:
<script type="text/javascript">
document.createElement("img").src="http://www.google.com"
</script>
From the following String:
<SCRIPT LANGUAGE=JavaScript>
var PAswf = "_ADPATH_[%SWF File%]";
var advurl = "_ADCLICK_";
var PAadvurl = escape(advurl);
var PAwidth = "[%Width%]";
var PAheight = "[%Height%]";
var wmValue = "_ADDCP(wm)_";
if (!wmValue)wmValue = "opaque";
var PAwmode = wmValue;
document.write('<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"');
document.write(' WIDTH="'+ PAwidth +'" HEIGHT="'+ PAheight +'">');
document.write('<PARAM NAME=movie VAL'+'UE="' + PAswf + '?clickTag='+ PAadvurl +'"><PARAM NAME=quality VALUE=high><PARAM NAME=wmode VALUE='+ PAwmode +'>');
document.write('<EMBED sr'+'c="'+PAswf + '?clickTag='+ PAadvurl +'" quality=high wmode='+ PAwmode);
document.write(' swLiveConnect=TRUE WIDTH="'+ PAwidth +'" HEIGHT="'+ PAheight +'"');
document.write(' TYPE="application/x-shockwave-flash">');
document.write('</EMBED></OBJECT>');
</SCRIPT>
<script type="text/javascript">
document.createElement("img").src="http://www.google.com"
</script>
As you can see, the String is at the bottom of the code block, but that shouldn't really matter. I've stored the first string as a variable, codeString, and tried the following.
// code refers to the bigger code string
code.replace(/codeString/gm, "");
Doesn't seem to match. I'm sure I'm doing something wildly wrong, but I've searched for about an hour and have come up empty. Any ideas?
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评论（2）
/codeString/是搜索文字“codeString”的正则表达式，而不是包含模式的变量。此外，string.replace(pattern, replacement)不会修改string，而是返回应用了替换的新字符串。您不需要像这样的正则表达式来删除固定字符串，下一个代码将从
code中删除一次字符串：/codeString/is a regular expression searching for the literal "codeString", not a variable containing a pattern. Also,string.replace(pattern, replacement)does not modifystringbut returns a new string with the replacement applied.You do not need a regular expression for stripping fixed strings like this, the next code will remove the string once from
code:好吧，你可以从
如果它需要是正则表达式，你可以使用：
但要注意正则表达式元字符应该用反斜杠转义。
Well you can start with
If it needs to be a regular expression, you can use:
but be aware that the regex metacharacters should be escaped with backslashes.