filters:{
str_limit : function (text,limit) {
if(!text){
return '';
}
else if(text.length()<limit){
return text;
}
else {
return text.substring(0,limit);
}
}
}
// register the previous filter in your componenet as a local filter
// then in your html
{{ valueToDisplay | str_limit(256) }} // we set the limit of that text to 256 char