javascript - Using a method inside a key value pair to truncate a string -


i using lodash , jquery library inside javascript , trying figure out how call method allow me truncate results of key value pair used create list inside .html code. html looks follows: 

 <div class="slide-in-panel">         <ul class="list-unstyled slide-in-menu-navigation" data-bind="foreach: __plugins">             <li class="btn-block">                 <div class="btn btn-default btn-block" data-bind="click: $parent.showplugin, tooltip: 'shoebox.panel'">                     <span data-bind="text: config.title"></span>                     <em class="webgis-icon webgis-cross slide-in-menu-remove-shoebox-button"                         data-bind="click: $parent.showremoveconfirmbox, tooltip: 'shoebox.removeshoebox'">                     </em>                 </div>             </li>         </ul>  </div>

the key component data-bind="text: config.title" part. populates list name button. config.title created in javascript file below. goal apply method such .truncate() config.title part in javascript keep whatever name being populated, being long. how this?

 return this.__backendshoeboxclient.createshoebox(this.__shoeboxname()).then((function(_this) {       return function(shoebox) {         return $when.join(shoebox.getname(), shoebox.getid(), shoebox.getusername()).then(function(arg) {           var shoeboxid, shoeboxname, username;           shoeboxname = arg[0], shoeboxid = arg[1], username = arg[2];           return _this.__shoeboxcontentfactory.create({             shoeboxid: shoeboxid,             shoeboxname: shoeboxname,             username: username           }).then(function(arg1) {             var activeshoeboxhandle, config, shoeboxcontent;             shoeboxcontent = arg1.shoeboxcontent, activeshoeboxhandle = arg1.activeshoeboxhandle;             _this.__activeshoeboxhandlemain.loadmodel(activeshoeboxhandle);             config = {               plugin: shoeboxcontent,               title: shoeboxname,               username: username,               id: shoeboxid,               handle: activeshoeboxhandle,               icon: ""             };             _this.add(config, null, null);             activeshoeboxhandle.loadmodel(shoebox);             _this.__shoeboxname.usedefaultvalue();             return _this.__shoeboxname.clearerror();           });         })["catch"](function(error) {           __logger__.error("error while calling request " + error);           return $when.reject(new error("error while calling request. " + error));         });       };     })(this));   };

i trying use knockout style binding this, without success:

<span data-bind="style: { textoverflow: ellipsis }, text: config.title"></span>

this should it: use truncate function this: config.title = _.truncate(config.title, {'length': maxlength});

return this.__backendshoeboxclient.createshoebox(this.__shoeboxname()).then((function(_this) {   return function(shoebox) {     return $when.join(shoebox.getname(), shoebox.getid(), shoebox.getusername()).then(function(arg) {       var shoeboxid, shoeboxname, username;       shoeboxname = arg[0], shoeboxid = arg[1], username = arg[2];       return _this.__shoeboxcontentfactory.create({         shoeboxid: shoeboxid,         shoeboxname: shoeboxname,         username: username       }).then(function(arg1) {         var activeshoeboxhandle, config, shoeboxcontent;         shoeboxcontent = arg1.shoeboxcontent, activeshoeboxhandle = arg1.activeshoeboxhandle;         _this.__activeshoeboxhandlemain.loadmodel(activeshoeboxhandle);         config = {           plugin: shoeboxcontent,           title: shoeboxname,           username: username,           id: shoeboxid,           handle: activeshoeboxhandle,           icon: ""         };         config.title = _.truncate(config.title, {'length': 15});         _this.add(config, null, null);         activeshoeboxhandle.loadmodel(shoebox);         _this.__shoeboxname.usedefaultvalue();         return _this.__shoeboxname.clearerror();       });     })["catch"](function(error) {       __logger__.error("error while calling request " + error);       return $when.reject(new error("error while calling request. " + error));     });   }; })(this));

};


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