Regex string does not contain?

Question

I'm trying to create a regex which finds a text that contains :

src
.js

and does not contain a question mark '?' at the same time.

For example I want my regex to match :

src="scripts/test.js"

and not match :

src="Servlet?Template=scripts/test.js"

because it contains a question mark sign.

Can anyone give me the appropriate regex?

Thanks a lot

This is one of those times when I would probably prefer to read `if (str.indexOf('src') !== -1 && str.indexOf('.js') !== -1 && str.indexOf('?') === -1) { ... }`. — Phylogenesis, Mar 26 '15 at 09:49
I wish I can use it ,but I'm dealing with a full template text so it might contain several occurrences of 'src' with '.js' and I want to alter each occurrence of src — user2484927, Mar 26 '15 at 09:54

score 2 · Answer 1 · answered Mar 26 '15 at 09:47

2

You can use this regex:

/\bsrc=(?!.*?\?).+?\.js\b/i

(?!.*?\?) is negative lookahead that means fail the match when there is a ? following src= in input string.

answered Mar 26 '15 at 09:47

anubhava

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thank you ! I tried it but it passed this text – user2484927 Mar 26 '15 at 09:51
1

Of course it did. Your specification asked for it to match that. – Phylogenesis Mar 26 '15 at 09:52
@user2484927: Why it should not match `` ? – anubhava Mar 26 '15 at 09:55
what I meant is that it didn't match this sentence – user2484927 Mar 26 '15 at 09:55
I want my test to match this type of sentence so I can alter it – user2484927 Mar 26 '15 at 09:57
@user2484927 Are you after something like [this](https://regex101.com/r/nC3wH4/2) that gets a capture of the string inside the `src` attribute? – Phylogenesis Mar 26 '15 at 10:01
1

I'm using in Java , Pattern and Matcher classes : `Pattern p= Pattern.compile("/=\\bsrc=(?!.*?\\?).+?\\.js\\b"); Matcher m= p.matcher(strTemplateText); ` `m.find()` is returning false even though strTemplatetext contains `` @anubhava @Phylogenesis – user2484927 Mar 26 '15 at 11:31
1

Java‽ The tag in your question says JavaScript. They are completely different languages. – Phylogenesis Mar 26 '15 at 11:37
@user2484927: Huh your question was tagged as `Javascript`. In Java it will be: `Pattern p = Pattern.compile("\\bsrc=(?!.*?\\?).+?\\.js\\b");` – anubhava Mar 26 '15 at 11:39
sorry ! I should have tagged java instead of javascript . It works now but I need to replace `` with `` Can you help? – user2484927 Mar 26 '15 at 11:52
You can use: **`String repl = input.replaceFirst("(\\bsrc=(?!.*?\\?).+?\\.js\\b)", "$1?Id=${id}");`** – anubhava Mar 26 '15 at 13:56

score 1 · Answer 2 · edited May 23 '17 at 11:43

You seem to be wanting to parse/make changes to HTML with regex, but since you're using JavaScript, you already have a fully functional DOM parser available to you.

How about the following:

var scripts = document.querySelectorAll('script[src]');

for (var i = 0; i < scripts.length; i++) {
    var src = scripts[i].getAttribute('src');

    if (/\.js$/.test(src) && src.indexOf('?') === -1) {
        alert(src);
    }
}

Example jsFiddle here.

Regex string does not contain?

2 Answers2