Glasnost Help and Documentation
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TAL and METAL
TAL
TAL Statements: attributes
TAL Statements: attributes
tal:attributes="attribute_name expression"
The attributes statement is used to add or replace one or several attributes of an element.
tal:attributes="attribute_name1 expression1; attribute_name2 expression2"
There can't be more than one attributes statement in one element. Several attributes are separated by semi-colons in the same statement.
Example
<textarea tal:attributes="col '20'; rows '15'">blah</textarea>
becomes
<textarea col="20" rows="15">blah</textarea>