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Oct 25, 2015
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Entries: Added normalizer documentation #15

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75 changes: 75 additions & 0 deletions entries/normalizer.xml
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Original file line number Diff line number Diff line change
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<?xml version="1.0"?>
<entry name="normalizer" type="method" return="String">
<title>normalizer</title>
<signature>
<argument name="value" type="String">
<desc>The value of the element.</desc>
</argument>
</signature>
<desc>Prepares/transforms the elements value for validation.</desc>
<longdesc>
Note that this method:
<p>Doesn't change the elements' value, it only changes the value used for validation.</p>
<p>Gets the value passed as argument, and "this" within it references the corresponding DOMElement.</p>
<p>Needs to return a String value, otherwise it will throw a TypeError exception.</p>
</longdesc>
<example>
<desc>Makes "field" required and use a normalizer to trim its value before validating</desc>
<code><![CDATA[
$( "#myform" ).validate( {
rules: {
field: {
required: true,
normalizer: function( value ) {
// Trim the value of the `field` element before
// validating. this trims only the value passed
// to the attached validators, not the value of
// the element itself.
return $.trim( value );
}
}
}
} );
]]></code>
<html><![CDATA[
<label for="field">Required: </label>
<input class="left" id="field" name="field">
<br/>
<input type="submit" value="Validate!">
]]></html>
</example>
<example>
<desc>Makes "url" required and use a normalizer to append 'http://', if not present, to the value of the "url" element before validating</desc>
<code><![CDATA[
$( "#myform" ).validate( {
rules: {
url_input: {
required: true,
url: true,
normalizer: function( element ) {
var url = element.value;

// Check if it doesn't start with http:// or https:// or ftp://
if ( url && url.substr( 0, 7 ) !== "http://"
&& url.substr( 0, 8 ) !== "https://"
&& url.substr( 0, 6 ) !== "ftp://" ) {
// then prefix with http://
url = "http://" + url;
}

// Return the new url
return url;
}
}
}
} );
]]></code>
<html><![CDATA[
<label for="url_input">url: </label>
<input class="left" id="url_input" name="url_input">
<br/>
<input type="submit" value="Validate!">
]]></html>
</example>
<category slug="methods"/>
</entry>