safari regex support

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Explanation

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• Common Tokens
• General Tokens
• Meta Sequences
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• Group Constructs
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• A single character of: a, b or c [abc]
• A character except: a, b or c [^abc]
• A character in the range: a-z [a-z]
• A character not in the range: a-z [^a-z]
• A character in the range: a-z or A-Z [a-zA-Z]
• Any single character .
• Alternate - match either a or b a|b
• Any whitespace character \s
• Any non-whitespace character \S
• Any digit \d
• Any non-digit \D
• Any word character \w
• Any non-word character \W
• Match everything enclosed (?:...)
• Capture everything enclosed (...)
• Zero or one of a a?
• Zero or more of a a*
• One or more of a a+
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• 3 or more of a a{3,}
• Between 3 and 6 of a a{3,6}
• Start of string ^
• End of string $
• A word boundary \b
• Non-word boundary \B

Regular Expression

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Does Safari support JavaScript RegExp?

In a cross-browser test of RegExp, Safari seemed to not support it.

MacBook Pro, OS X Mavericks (10.9.1)

Posted on Sep 5, 2016 6:40 PM

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Sep 5, 2016 8:37 PM in response to WCHawk

Sep 6, 2016 7:13 AM in response to WCHawk

The answer is yes, Safari has supported JavaScript RegExp for years. It is straight forward when used in HTML. If you use RegExp in a Do JavaScript within AppleScript, it invokes an Apple Event, and Safari 9.1.3 will block you with the following dialog:

One then enables Allow JavaScript from Apple Events from the Safari Develop menu, at the cost of a user password prompt when the AppleScript is run.

Look at the Regular Expressions example for JavaScript at Rosetta Code . Add that to a <script> section in an HTML document, and add the following line before your closing </script> tag, before you open the HTML in Safari 9.1.3.

alert(isMatch + " " + matches[1]);

Workaround for Lookbehind Regex in Safari

Workaround for Lookbehind Regular expressions in Safari

Prathamesh Sonpatki

In this post we will discuss:

• What are Lookbehind Regex
• Browser Compatibility of Lookbehind Regex
• Alternative ways to use them so that it works in all browsers

What are Lookbehind regex

At times, we need to match a pattern only if it is followed or preceded by another pattern.

For eg. in case of URL which contains the organization information:

Here, :org is dynamic name of the organization which can be of following pattern:

We want to match all URLs which match the pattern for

But there are also URLs such as which we don't want to match.

Where the slug is also of same pattern as /[a-z0-9]/ .

So we want to make sure that we match the organizations URLs only if they are preceded by organizations word.

There is a way to write such regular expressions using Lookbehind regex which checks if a pattern is preceded by specific pattern.

The syntax is:

• Positive lookbehind: (?<=Y)X , matches X , but only if there’s Y before it.
• Negative lookbehind: (?<!Y)X , matches X , but only if there’s no Y before it.

In our case:

We use this as follows:

Which will basically replace anything that followed our pattern organizations/:org :

Browser Compatibility

Lookbehind regex are very powerful but they are not supported in all browsers. Non V8 browsers such as Safari don't support them.

Let's run the same example in Safari:

Alternative to use Lookbehind Regex in Safari

We can relook at our usage and try to avoid the lookbehind regex and just use the capture groups.

In this case, we capture two groups, the first one where organizations/:org/ gets captured and then in second everything else.

We want to keep organizations/:org/ and drop everything else. This can be achieved with following:

This basically keeps the first match and drops everything else. Most importantly, this works on Safari as well!

P.S. If you want detailed overview on Lookbehind and its friend Lookahead regex, this is an excellent post - https://javascript.info/regexp-lookahead-lookbehind

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Flagrant Badassery

A JavaScript and regular expression centric blog

Safari Support with XRegExp 0.2.2

When I released XRegExp 0.2 several days ago, I hadn't yet tested in Safari or Swift. When I remembered to do this shortly afterwards, I found that both of those WebKit-based browsers didn't like it and often crashed when trying to use it! This was obviously a Very Bad Thing, but due to major time availability issues I wasn't able to get around to in-depth bug-shooting and testing until tonight.

It turns out that Safari's regex engine contains a bug which causes an error to be thrown when compiling a regex containing a character class ending with " [\\ ".

As a result, I've changed two instances of [^[\\] to [^\\[] and upped the version number to 0.2.2. XRegExp has now been tested and works without any known issues in all of the following browsers:

• Internet Explorer 5.5 – 7
• Firefox 2.0.0.4
• Safari 3.0.2 beta for Windows

You can get the newest version here .

3 thoughts on “Safari Support with XRegExp 0.2.2”

I have now published my SweetXML parser, using your XRegExp.

I developed it first without using your code, and you will be pleased to here that it was a 5 minute swap-in. Worked a dream, with no errors.

SweetButty seems like the perfect kind of project to use XRegExp… a regex intensive app, which becomes much more self-documenting though named capture.

http://bugs.webkit.org/show_bug.cgi?id=14823

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Regex not compatible with safari, need help to convert

Hello guys, seems that Safari does not support look behind assertion, so now i have a perfect script that works fine except on Safari, there’s a way to make this perfectly cross-browser?

Use two regexes, one ran after the other.

it is not possible to use unique?

someone could provide an example? i have no experienxe with regex

this is the good work…but with no look behind for safari

It would be very helpful if you showed what you were trying to match. You can’t have lookbehind if you need to support Safari, but you can definitely use something different to match what you want. It’s difficult to know what though without knowing what your aim is.

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Lookbehind regexes don't work in Safari #10

ronaldtse commented Sep 1, 2020 • edited

ronaldtse commented Sep 1, 2020

Sorry, something went wrong.

webdev778 commented Sep 2, 2020

Webdev778 commented oct 23, 2020.

webdev778 commented Jul 9, 2021

Webdev778 commented jul 12, 2021, ronaldtse commented jul 12, 2021.

xyzshantaram commented Sep 13, 2021

• 👍 1 reaction

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JavaScript built-in: RegExp: test

• 6 - 10 : Supported
• 11 : Supported
• 12 - 124 : Supported
• 125 : Supported
• 2 - 125 : Supported
• 126 : Supported
• 127 - 129 : Supported
• 4 - 124 : Supported
• 126 - 128 : Supported
• 3.1 - 17.4 : Supported
• 17.5 : Supported
• 17.6 - TP : Supported
• 10 - 109 : Supported
• 110 : Supported

Safari on iOS

• 3.2 - 17.4 : Supported
• 17.6 : Supported
• all : Support unknown

Android Browser

• 2.1 - 4.3 : Not supported
• 4.4 - 4.4.4 : Supported

Opera Mobile

• 12 - 12.1 : Supported
• 80 : Supported

Chrome for Android

Firefox for android, uc browser for android.

• 15.5 : Support unknown

Samsung Internet

• 4 - 24 : Supported
• 25 : Supported
• 14.9 : Support unknown

Baidu Browser

• 13.52 : Support unknown

KaiOS Browser

• 2.5 : Support unknown
• 3 : Support unknown

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Regex for Safari 4+

• 4.5 • 2 Ratings

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Description.

Search web page using regular expression, copy all matched text with 1 click Highlight all matched text instantaneously on web page as you type. Automatic regex validation check as you type. In case you made a mistake composing your regex, input box will yield a red background so you know something is wrong right away. One click to copy all matched text on page. Keyboard shortcut support, "Command+Shift+F" to call the plugin, "Enter/Shift + Enter" to go to next/previous match. No need to type in regex every time. All your regular expressions are saved locally on your device. Customizable highlight color, among all the other options you can tweak to better suits your needs. Feedback and reviews are welcomed! Any questions, feel free to email me at [email protected]

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Does the thing, but not gracefully.

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Works Great

Very straightforward to use, makes searching on pages for complex things so much easier

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