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Replacing existing nodes

From: JavaScript: Enhancing the DOM

Video: Replacing existing nodes

In the last movie, we learned how to move things around in the DOM by cloning and then removing a node. If you're just trying to replace an existing element then there's a function that does just that. replaceChild lets you take a node and replace it with another node. Since it's replacing a child you have to call it from the parent node, so it can be a bit confusing to use. This method is more convenient than cloning and replacing. You don't have to delete the original node. So, let's take a look at this in our project. So, I'm going to pull up the console. To replace a node, we need to get both the node we want to move and the one we want to replace.

Replacing existing nodes

In the last movie, we learned how to move things around in the DOM by cloning and then removing a node. If you're just trying to replace an existing element then there's a function that does just that. replaceChild lets you take a node and replace it with another node. Since it's replacing a child you have to call it from the parent node, so it can be a bit confusing to use. This method is more convenient than cloning and replacing. You don't have to delete the original node. So, let's take a look at this in our project. So, I'm going to pull up the console. To replace a node, we need to get both the node we want to move and the one we want to replace.

So, I want to move this same list of artists, right here. I'm going to click on a magnifying glass. Click on one of these just to get the path right here. And these very useful bread crumbs that kind of tells us where we're at. So I know that this whole section is called featured artists. So that's what I want to move. This time I don't just want to move the photos I'm going to take this whole section. So first I'll create a variable here called my node. I use query selector and I want to get that entire list of featured artists.

So I'll get the element with the ID of featured artists. (SOUND) And again, you want to be careful that you use querySelector, not querySelectorall, or you'll get an array of element, even if it's the only element in the page with that ID. So, next, I'm going to do a variable for replaceNode and I'm going to find document.querySelector. And this time I'm going to look for the item comingtoevent. So, this is the item that I want to replace.

And so if I look at that, let's see this is coming to the event. So I want to replace this feature artist with coming to the events section. So, I can show you where that is. Click on the magnifying glass, click-right here and it tells you there's the I.D. that we're looking for coming to event. So hit Enter. So now you can just issue a replaceChild method. Just like cloning, we have to replace the child in the parent node for it to work. So here we go. We'll use replace node. And then we'll say, I want to get the parent node of this element and replace child.

And what I want to do is replace my node with this replace node and the position that we want to replace with. And when I hit Enter (SOUND), I've replaced this section right here with this section called featuredartists that I imported from my node. So that's a pretty fast way of moving things around. ReplaceChild saves you the step of having to delete the original node.

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This video is part of

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

36 video lessons · 7801 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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