CODEWITHSUNDEEP
regex
David Faizulaev
David Faizulaev

Reputation: 5761

Regex assistance - do not match specific string

I have the following REGEX:

/(?:(?:src|href|poster|altimg|data)\s*=\s*)(?!['"]?(?:http|#|mailto:|data:|tel:|sms:))['"]([^'">]+)|(?:url\()(?!['"]?(?:http))['"]?([^'")]+)/gm

In case in the string contains a substring which is data-href, it matches it.

For example:

<figure class="figure--fullwidth figure--linked" data-figure-id="w-3-1" data-index="20"><a class="figure__link" data-href="..\images\W-3-1.png" tabindex="0" data-size="1218x920" data-index="21"><img class="figure__image figure__thumbnail" alt="" src="../images/W-3-1.png" data-image-id="w-3-1" data-index="22" data-size="%7B%22width%22%3A1218%2C%22height%22%3A920%7D"></a></figure>

Here it matches data-href="..\images\W-3-1.png" I don't want to match it, only in case the string is href......

How can modify the regex that it will only match cases when it's href and not data-href?

Thanks in advance.

Upvotes: 1

Views: 46

Answers (1)

anubhava
anubhava

Reputation: 786291

You can use a negative lookbehind assertion to make sure to match only specified attributes using your regex:

/(?<!\S)(?:(?:src|href|poster|altimg|data)\s*=\s*)(?!['"]?(?:http|#|mailto:|data:|tel:|sms:))['"]([^'">]+)|(?:url\()(?!['"]?(?:http))['"]?([^'")]+)/

Here is a regex demo

(?<!\S) is negative lookbehind assertion that doesn't allow any non-whitespace character before matching your attributes.

Upvotes: 1

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