bapp05.indd 02/17/2015 Page 523

Manipulating Content,

Attributes, and Custom Data

METHOD/PROPERTY DESCRIPTION RETURN

VALUE

AT TRIBUTES

attr(name) Returns the attribute value for the speci-

fi ed attribute from the fi rst element present

in a selection. If no element is present, the

method returns undefined.

String,

Undefi ned

attr(object) Allows you to set attributes via the specifi ca-

tion of key, value pairs. For example:

attr({

id : 'idName',

href : '/example.html',

title : 'Tooltip text.'

});

jQuery

attr(key, value) Allows you to specify an attribute by pro-

viding the name of the attribute in the

key argument and its value in the value

argument.

jQuery

attr(key, function) Sets an attribute’s value depending on the

return value of the callback function that you

specify. The callback function is executed

within the context of each selected ele-

ment, where each selected element can be

accessed within the function via this.

jQuery

E

continues

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