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Targeting the attributes property

From: JavaScript: Enhancing the DOM

Video: Targeting the attributes property

Another way you can get access to attributes inside your nodes is through the attributes property. Once you retrieve this property, its values can be accessed in a number of ways. So you can look for them by numeric index, also by named index or dot notation. So, let's take a look at how that works. So here's my file, I'm going to get into the console, and I'll create a variable that accesses a specific node instance.

Targeting the attributes property

Another way you can get access to attributes inside your nodes is through the attributes property. Once you retrieve this property, its values can be accessed in a number of ways. So you can look for them by numeric index, also by named index or dot notation. So, let's take a look at how that works. So here's my file, I'm going to get into the console, and I'll create a variable that accesses a specific node instance.

Let's test my node, and it has the first image, and that is this image right here. So, we can get to all the attributes inside this image by using my node and then type in attributes. When we hit Enter, you see that we have a node map, and it's a list of all the attributes in numeric order. Now this is a pretty interesting object, because it has attributes of both array elements, and also objects. So, you can get to the source attribute in a number of ways. It's the first attribute, so it would have an index of zero. And that works like an array.

You can also get to it by using source or SRC as the key. You can even get to it by using SRC in .notation. Unfortunately, these are read only values. So ,you can't really set them this way. It does give you the ability to read attributes as a list, which could come in handy in some projects.

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Image for JavaScript: Enhancing the DOM
JavaScript: Enhancing the DOM

36 video lessons · 7822 viewers

Ray Villalobos
Author

 
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  1. 2m 36s
    1. Welcome
      59s
    2. What you should know before watching this course
      50s
    3. Using the exercise files
      47s
  2. 24m 33s
    1. What is the Document Object Model (DOM)?
      3m 2s
    2. Navigating the DOM with developer tools
      8m 10s
    3. Testing JavaScript commands with the console
      5m 50s
    4. Communicating with the console through JavaScript
      7m 31s
  3. 31m 9s
    1. Selecting elements with getElementById
      4m 10s
    2. Choosing elements by HTML tag
      3m 20s
    3. Isolating elements by class name
      3m 12s
    4. Querying CSS to select elements
      4m 54s
    5. Working with named form elements
      3m 39s
    6. Understanding nodeType, nodeName, and nodeValue
      4m 30s
    7. Traversing up and down DOM nodes
      4m 40s
    8. Targeting node elements
      2m 44s
  4. 22m 25s
    1. Changing HTML attributes
      5m 25s
    2. Working with restricted attributes
      2m 49s
    3. Detecting data attributes
      3m 29s
    4. Controlling classes with the HTML5 classList
      3m 21s
    5. Targeting the attributes property
      1m 24s
    6. Using text content modifiers
      3m 42s
    7. Modifying elements as text
      2m 15s
  5. 14m 57s
    1. Creating and appending nodes
      4m 27s
    2. Controlling node insertions with insertBefore
      3m 17s
    3. Cloning and removing nodes
      4m 41s
    4. Replacing existing nodes
      2m 32s
  6. 26m 14s
    1. What we'll build
      2m 16s
    2. Adding a bubbling event listener
      4m 11s
    3. Creating and styling an overlay with JavaScript
      4m 39s
    4. Adding an image
      3m 48s
    5. Resizing images in the DOM
      2m 59s
    6. Centering an image
      2m 36s
    7. Handling clicks
      1m 29s
    8. Adjusting for scrolling
      1m 36s
    9. Detecting and adjusting for a window resize
      2m 40s
  7. 1m 49s
    1. Next steps
      1m 49s

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