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kist-backbone-view

Extends Backbone.View with useful features.

Features:

• Subview managment: adding, getting and removing
• Optional Virtual DOM support for rendering

Install

npm install kist-backbone-view --save

Usage

Basic usage.

const View = require('kist-backbone-view');
 
const view = View.extend({
    initialize: function () {
        this.addSubview(new View());
        this.addSubview(new View(), 'customKey');
    },
    getCustomKeyView: function () {
        return this.getSubview('customKey');
    }
});

Render placeholder and view assign usage.

const View = require('kist-backbone-view');
 
const view = View.extend({
    initialize: function () {
        this.addSubview(new View(), 'customKey');
    },
    render: function () {
        this.$el.html(this.template({
            customKeyComponent: this.getSubview('customKey').getRenderPlaceholder()
        }));
        this.assignSubview('customKey');
    }
});

Virtual DOM variant usage.

const View = require('kist-backbone-view/virtual-dom');
 
const view = View.extend({
    template: function ( data ) {
        return `<span>${data.count}</span>`;
    },
    render: function () {
        this.renderDiff(this.template({
            count: 42
        }));
        return this;
    }
});

API

addSubview(view, key)

Adds subview to current view.

view

Type: Backbone.View

Subview to add to current view.

key

Type: String|Number

Subview key so it can be easily identified in subview collection. If undefined, view’s cid property will be used.

getSubview(key)

Gets subview referenced by key.

key

Type: String|Number

Key which is used to reference subview.

removeSubviews

Removes all subviews from current view.

getRenderPlaceholder

Returns view’s placeholder element which will be used in resolving for assignSubview.

assignSubview(key)

Replaces view’s render placeholder with real content (returned when running render method).

If you’re using renderDiff for content rendering, explicit call for this method is unecessary—it will be called for every subview which rendered it’s placeholder with getRenderPlaceholder.

key

Type: String|Number

Key which is used to reference subview.

renderDiff(content)

Renders virtual-dom patches to current view’s element.

Available only for Virtual DOM implementation.

content

Type: String|Number|Element|jQuery

Content which should be diffed with current element and will be used to patch it.

fromTemplate

Type: Boolean

Should this view be fully constructed from template. Useful when you want to completely hold view representation inside template files (default Backbone behavior is to have root element outside template).

Available only for Virtual DOM implementation.

Virtual DOM

Optionally you can use virtual-dom implementation of this module to achieve performant rendering of your content. The difference in applying template content is very subtle—instead of applying new content to DOM element directly, you use convenient renderDiff method.

Browser support

Tested in IE9+ and all modern browsers.

Test

For local automated tests, run npm run test:automated:local (append :watch for watcher support).

License

MIT © Ivan Nikolić