Knockout: Unable to process binding

2024/2/27 8:14:38

I asked this question earlier but did not get an answer.

I get this error message when I run my code:

Uncaught ReferenceError: Unable to process binding "visible: function (){return !editable() }"
Message: editable is not defined 

the editable function is supposed to toggle true/false and then switch to edit mode when a button is pressed. This button is called through a foreach in the html so i'm guessing it has something to do with my viewmodel. The output I get from my getJson works fine but the editable function conflicts somehow.

Here is my html code:

<div><ul data-bind="foreach: comments"><li class="ul3"><span class="author" data-bind="text: nickname, visible: !editable(), click: editComment"></span><input type="text" data-bind="value: nickname, visible: editable()"/>:<div>  <span class="comment" data-bind="text: newMsg, visible: !editable(), click: editComment">    </span><textarea class="myComment" type="text" data-bind="value: newMsg, visible: editable()">                       </textarea></div><button data-bind="click: editComment, text: editable() ? 'Save' : 'Edit comment'">           </button> <button data-bind="click: deleteComment">Delete</button></li></ul></div>

And here is my javascript:

      function Comment() {var self = this;self.nickname = ko.observable();self.newMsg = ko.observable();self.editable = ko.observable(false);self.sendEntry = function () {vm.selectedComment(new Comment());if (self.newMsg() !== "" && self.nickname() !== "") {$.post(writeUrl, "entry=" + ko.toJSON(self));self.newMsg("");}vm.cSection().getNewEntries();};self.deleteComment = function () {vm.comments.remove(self);};self.editComment = function () {self.editable(!self.editable());};
function commentSection() {var self = this;self.timestamp = 0;var entry;self.getNewEntries = function () {$.getJSON(readUrl, "timestamp=" + self.timestamp, function (comments) {for (var i = 0; i < comments.length; i++) {entry = comments[i];if (entry.timestamp > self.timestamp) {self.timestamp = entry.timestamp;}vm.comments.unshift(entry);}self.getNewEntries();});};}function ViewModel(){var self = this;self.cSection=ko.observable(new commentSection());self.comments = ko.observableArray();self.selectedComment = ko.observable(new Comment());//self.cSection().getNewEntries();
var vm=new ViewModel();

I made it something from your code now toggle is working fine .

please find this Working Fiddle

View :

<input type="button"data-bind="click: editComment, value:editable() ? 'Save' : 'Edit comment'" /> 

View Model:

$(document).ready(function() {vm = function ViewModel() {var self = this;self.comments = ko.observableArray();function Comment() {var self=this;self.editable = ko.observable(false);self.editComment = function() {self.editable(!self.editable());};}self.comments.push(new Comment());  };ko.applyBindings(new vm);

If issue still exists please make use of above fiddle and try to build your code in it let me know .

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