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HTML5 Projects: Engaging Ecommerce
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Retrieving list items


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HTML5 Projects: Engaging Ecommerce

with Joseph Lowery

Video: Retrieving list items

It's time for the final step of our project. In the previous lesson, I showed you how ridiculously easy it was to save items in local storage. In this lesson, we'll cover how to retrieve and display them. Ao I have my dragdrop.js file where we put in the saveFaves routine last, and now let's bring in the loadFaves routine. So I'm going to put it at the tail end of the JavaScript code block here, not in any function, so it will run automatically when the page loads.

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HTML5 Projects: Engaging Ecommerce
37m 29s Intermediate Nov 06, 2012

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The HTML5 Projects series combines HTML5, CSS3, and recent JavaScript API technologies to work—enhancing your web projects with interactivity and multimedia. This installment shows you how to build features that allow visitors to your online store to filter their selections interactively via sliders, drag items onto wish lists, and automatically save them locally. Author Joseph Lowery uses this scenario as an opportunity to introduce concepts such as HTML5 form elements with JavaScript enhancements, local content storage, and drag-and-drop.

Topics include:
  • Including range form elements
  • Modifying the display interactively
  • Establishing JavaScript functions
  • Dragging items to wish lists
  • Storing wish list items locally
  • Saving and retrieving list items
Subjects:
Web User Experience Ecommerce Web Design Projects
Software:
HTML JavaScript CSS
Author:
Joseph Lowery

Retrieving list items

It's time for the final step of our project. In the previous lesson, I showed you how ridiculously easy it was to save items in local storage. In this lesson, we'll cover how to retrieve and display them. Ao I have my dragdrop.js file where we put in the saveFaves routine last, and now let's bring in the loadFaves routine. So I'm going to put it at the tail end of the JavaScript code block here, not in any function, so it will run automatically when the page loads.

So there is a call to loadFaves, and now let's put in that code itself. I'll make a little extra room there, so we can see what's happening. So it's function loadFaves curly brace pair. Now the first thing we want to make sure is that the function that we're trying to load exists. So we'll use an if statement, if (localStorage.get item) and then another curly brace and then another set of parentheses and quotes, and we want to check to see if the items favorites is the one that exists.

So if that exists--and let's put in another curly brace pair here--then what we want to do is get it and then assign what we get to the inner HTML of the unordered list, which we know as the variable the faves. So, it's theFaves.innerHTML = localStorage.getItem, and in parentheses, favorites, semicolon at the end and save, and that's it.

Let's check our work in the browser. I'll refresh the page. Now, let's scroll down, and let's say this time we want the eye, the $400, one of our favorites. It shows up in our list. And let's bring in rabbit as well. Okay, so I'm going to just copy this URL, and open up a new tab, paste it in, and hit Refresh, and then when I scroll down, there are my favorites. Well, congrats! Your ecommerce catalog is now greatly enhanced and totally engaging, with three interwoven HTML5-related technologies.

I'm sure your users will appreciate the upgrade to their experience.

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