CODEWITHSUNDEEP
javascriptknockout.js
Sailing Judo
Sailing Judo

Reputation: 11233

Knockout JS removeAll() fails the second time it is called

In my view model I have a couple of methods that reset the data in an observable array. Everything works fine the first time I click a the button which calls the newGame method. However, the second time I click the button I get a javascript error.

    self.newGame = function () {
        // reset the zones
        self.resetBoardState();

        // more stuff here but clipped for brevity ...
    }

    self.resetBoardState = function () {
        // clear all zones...
        self.library.removeAll();

        // place all cards in deck into library ...
        self.library = JSON.parse(JSON.stringify(self.deck));
    }

The error I'm getting in the javascript console is:

Uncaught TypeError: Object [object Array] has no method 'removeAll'

I have a JS Fiddle here so the whole view model can be seen. If you click the "New Game" button the first time everything works perfectly. You can also click the "Draw a Card" button and it behaves properly as well. However, clicking "Mulligan" button causes the same error as clicking "New Game" again.

What can I do to get this functional?

Upvotes: 0

Views: 82

Answers (1)

scaryman
scaryman

Reputation: 1900

self.library is originally an observableArray, but your reset turns it into a plain array. Instead, just set the value of the existing observable.

replace the line

self.library = JSON.parse(JSON.stringify(self.deck));

with

self.library(JSON.parse(JSON.stringify(self.deck)));

Upvotes: 2

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