Question

im starting to use Backbone.js and im trying to do somthing simple with javascript, which is show/hide divs. I get to show the div but i cannot hide it, i try many things, any idea? or could be it more sophisticated?

var Step1View = Backbone.View.extend({
    el: $('body'),
    events: {
        'click #more': 'more',
        'click #hide': 'hide',
    },

    initialize: function (){
        _.bindAll(this, 'render', 'more', 'next', 'less');
        this.render();
    },

    render: function (){
        var self = this;
        $(this.el).append("<a id='more'>Show more</a>");
        $(this.el).append("<div id='show' style='display: none'>Div12</div>");
        return this;
    },

    more: function (){
        $('#more').text('Hide more');
        $('#more').attr('id', '#hide');
        $('#show').show();
    },

    less: function (){
        $('#hide').text('Show more');
        $('#show').hide();
    },

});

Cheers

Answer 1

You have a lot of problems here.

You’re trying to bind an event to a non-existent hide method, your events should look like this:

events: {
    'click #more': 'more',
    'click #hide': 'less',
},

Your initialize method is trying to bind a method, next, which does not exist. Your initialize should look more like this:

initialize: function (){
    _.bindAll(this, 'render', 'more', 'less');
    this.render();
},

Your more method is setting the id to #hide but it should be hide:

more: function (){
    $('#more').text('Hide more').attr('id', 'hide');
    $('#show').show();
},

Your less method doesn’t switch the id back to more:

less: function (){
    $('#hide').text('Show more').attr('id', 'more');
    $('#show').hide();
}

And you have a stray comma after less which will make some browsers unhappy.

Demo: http://jsfiddle.net/ambiguous/8HkdT/

Swapping the id attributes like that is a bit dodgy. You’d be better off with separate links that you show and hide along with the <div> or just a single toggle button that does both the showing and hiding.