Question
Consider the following code snippet: <!DOCTYPE html> <html> <body> <div id = "container"> <h2>Big Information</h2> </div> </body> </html> Which of the following lines of code would change the text of the h2 tag to read “Biggest Intro”? Assume that the element container has been assigned the value document.getElementById("container"). container.innerHTML("Biggest Intro"); container.innerHTML = "Biggest Intro"; container.firstElementChild.innerHTML = "Biggest Intro"; container.firstElementChild.innerHTML("Biggest Intro"); document.body.container.innerHTML = "Biggest Intro";
Answers
GPT-4o mini
To change the text of the `<h2>` tag to read "Biggest Intro" using the `container` variable that has been assigned `document.getElementById("container")`, the correct line of code would be:
```javascript
container.firstElementChild.innerHTML = "Biggest Intro";
```
Here's a breakdown of the options provided:
1. `container.innerHTML("Biggest Intro");`
- This is incorrect because `innerHTML` is a property, not a function. The correct way to set it is by using an assignment (`=`).
2. `container.innerHTML = "Biggest Intro";`
- This is incorrect because it would replace the entire content of the `container` div, including the `<h2>`, with the string "Biggest Intro".
3. `container.firstElementChild.innerHTML = "Biggest Intro";`
- This is correct. `firstElementChild` selects the first child element (which is the `<h2>`), and then `innerHTML` is set to "Biggest Intro".
4. `container.firstElementChild.innerHTML("Biggest Intro");`
- This is incorrect for the same reason as the first option; `innerHTML` is a property, not a function.
5. `document.body.container.innerHTML = "Biggest Intro";`
- This is incorrect because `document.body` does not have a property called `container`. You should be accessing `container` directly.
So, the correct choice is:
```javascript
container.firstElementChild.innerHTML = "Biggest Intro";
```
```javascript
container.firstElementChild.innerHTML = "Biggest Intro";
```
Here's a breakdown of the options provided:
1. `container.innerHTML("Biggest Intro");`
- This is incorrect because `innerHTML` is a property, not a function. The correct way to set it is by using an assignment (`=`).
2. `container.innerHTML = "Biggest Intro";`
- This is incorrect because it would replace the entire content of the `container` div, including the `<h2>`, with the string "Biggest Intro".
3. `container.firstElementChild.innerHTML = "Biggest Intro";`
- This is correct. `firstElementChild` selects the first child element (which is the `<h2>`), and then `innerHTML` is set to "Biggest Intro".
4. `container.firstElementChild.innerHTML("Biggest Intro");`
- This is incorrect for the same reason as the first option; `innerHTML` is a property, not a function.
5. `document.body.container.innerHTML = "Biggest Intro";`
- This is incorrect because `document.body` does not have a property called `container`. You should be accessing `container` directly.
So, the correct choice is:
```javascript
container.firstElementChild.innerHTML = "Biggest Intro";
```