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February 22, 2012 21:22
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Regex Selector for jQuery - James Padolsey
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jQuery.expr[':'].regex = function(elem, index, match) { | |
var matchParams = match[3].split(','), | |
validLabels = /^(data|css):/, | |
attr = { | |
method: matchParams[0].match(validLabels) ? | |
matchParams[0].split(':')[0] : 'attr', | |
property: matchParams.shift().replace(validLabels,'') | |
}, | |
regexFlags = 'ig', | |
regex = new RegExp(matchParams.join('').replace(/^\s+|\s+$/g,''), regexFlags); | |
return regex.test(jQuery(elem)[attr.method](attr.property)); | |
} |
I don't understand.
What is the large code snippet at the top? Do I put that into my js so that these lines from the Usage will work? I tried this, and I got
SyntaxError: syntax error
method: matchParams[].match(validLabels) ?
Help appreciated. Thanks
http://james.padolsey.com/javascript/regex-selector-for-jquery/
jQuery.expr[':'].regex = function(elem, index, match) {
var matchParams = match[3].split(','),
validLabels = /^(data|css):/,
attr = {
method: matchParams[0].match(validLabels) ?
matchParams[0].split(':')[0] : 'attr',
property: matchParams.shift().replace(validLabels,'')
},
regexFlags = 'ig',
regex = new RegExp(matchParams.join('').replace(/^\s+|\s+$/g,''), regexFlags);
return regex.test(jQuery(elem)[attr.method](attr.property));
}
You have error at this line:
regex = new RegExp(matchParams.join('').replace(/^s+|s+$/g,''), regexFlags);
Do not forget backslash before 's'
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Regex Selector for jQuery – James Padolsey
A while ago I published an article explaining the utter awesomeness of extending jQuery’s filter selectors. Building on that here’s something new; a regular expression selector. jQuery’s current attribute selectors (CSS3) do allow basic regex notation but no where near as much as this:
:regex
Usage
It’s pretty simple to use, you need to pass an attribute and a regular expression to match against. The regular expression must be in non-literal notation; so replace all backslashes with two backslashes (e.g.
^w+$
->^\w+$
).Note: All searches are case insensitive; you can change this by removing the ‘i’ flag in the plugin.
This plugin also allows you to query CSS styles with regular expressions, for example:
Additionally it allows you to query data strings added to elements via jQuery’s ‘data’ method:
Have fun!
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