Pipes modify binding behavior by transforming values while they move from class properties to templates. They are placed after the binding expression, preceded by the | character. Several pipes may be stacked one after the other in the same binding, each separated from the others by a | symbol:
'<binding expression>|pipe1|pipe2...'
Pipes may have arguments that are placed after the pipe name and separated by colons:
'<binding expression>|pipe1:arg1:arg2|pipe2...'
Since arguments are identified by their positions, when an argument that is specified is preceded by other absent arguments, : separators must be added as placeholders for the missing arguments:
'<binding expression>|pipe1::arg2|pipe2...'
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