may be a bug of twoWay directive

[suemi994]

When I define a twoWay directive and use set function in bind, there is an error 'can't read property set of undefined' , my code follows.

Vue.directive('tags',{
    twoWay:true,
    bind: function () {
        var self=this;
        console.log(self);
        $(self.el).on('itemAdded',function(){
             self.set($(this).val());
        });
    },

    unbind:function(){
        $(this.el).off();
    }
});

[suemi994]

Even when I try the example in the guide, there are also those errors.

Uncaught TypeError: Cannot read property 'set' of undefined

[yyx990803]

Yeah... this is a bug, but if you just give a an empty update function it should work. Also fixed in dev branch.

[EmaileriMikko]

@yyx990803 This still doesn't work.

See here for an example without update and here for a directive with update method.

[simplesmiler]

@EmaileriMikko in Vue 2 directives no longer have this.
https://vuejs.org/v2/guide/migration.html#Custom-Directives-simplified