javascript - Knockout and bootstrap not binding -

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i cannot value of bound data-bind. when try read value undefined.

i have setup fiddle here:

http://jsfiddle.net/tonymaloney1971/2qjhb5pw/5/

i think possibly problem in way have setup knockout binding:

$(document).ready(function () {     var data = [{ postcodestart: "", postcodeend: "", mileage: "", notes: ""     }];           add: function () { //this part not working this.postcodestart() === ""              alert("how value of postcodestart");             if (this.postcodestart() === "" || this.postcodeend() === "" || this.mileage() === "") {                 alert("empty field");             }             else                 this.journeylist.push({ postcodestart: this.postcodestart(), postcodeend: this.postcodeend(), mileage: this.mileage(), notes: this.notes() });         },

also, in fiddle notice

  • dot added each time add new row, how can not display
  • .

    thanks

    • i've made modified fiddle gets data add , remove functions. general rule, not using this make knockout work. side-note, douglas crockford makes fair case never using this in talk class-free oop.

    here's relevant html:

                        <button class="btn-success img-rounded" data-bind="click:$root.add">                         <span class="glyphicon glyphicon-plus-sign" style="text-align:right"></span>                     </button>                     <button class="btn-danger img-rounded" data-bind="click:$root.remove">                         <span class="glyphicon glyphicon-remove"></span>                     </button>

    and viewmodel:

        var viewmodel = {         journeylist: ko.observablearray(data),         add: function (data) {             if (data.postcodestart === "" || data.postcodeend === "" || data.mileage === "") {                 alert("empty field");             }             else {                 viewmodel.journeylist.push({ postcodestart: data.postcodestart, postcodeend: data.postcodeend, mileage: data.mileage, notes: data.notes });             }         },          remove: function (data) {             viewmodel.journeylist.remove(data);         }     };

    updated: added style list eliminate bullets.

        <ul data-bind="foreach: journeylist" style="list-style-type:none">

    http://jsfiddle.net/q6cjygy1/1/


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