Mastering Flask Web Development - Second Edition

The truncate filter

The truncate filter takes a long string, returns a string cutoff at the specified length in characters, and appends an ellipsis, as shown in the following code:

{{ "A Longer Post Body Than We Want" | truncate(10) }} 
A Longer... 

By default, any words that are cut in the middle are discarded. To disable this, pass True as an extra parameter as follows:

{{ "A Longer Post Body Than We Want" | truncate(10, True) }} 
A Longer P...