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VisualizaçõesCollect a specific attribute from the last appearance of an element
function refresh_images() {
if (!document.images) return;
const totalimages = document.querySelectorAll("img").length;
const lastimages = document.getElementsByTagName('img')[totalimages].getAttribute('name').replace("grafico-betfair-", "");
}
I'm trying to collect the element called name="grafico-betfair-5" but it returns an error saying:
Uncaught TypeError: Cannot read properties of undefined (reading 'getAttribute') at refresh_images
What should I change in my code so I can retrieve the value?
·
Juan Pablo Isaza
1 Respostas
Responde à pergunta0
You can get the last image by using the last index which you can get by deducting 1 from the length of the NodeList.
And also, as String.prototype.replace() method does not change the calling String object. It returns a new string, you need to set the attribute with the new name.
Demo:
//get all the images
const totalImages = document.querySelectorAll('img');
//get the last image
const lastImage = totalImages[totalImages.length - 1];
//get the new image name
const lastImageName = lastImage.getAttribute('name').replace("grafico-betfair-", "");
//set the new name
lastImage.setAttribute('name', lastImageName);
//print the last image
console.log(lastImage);<img name="test1" src="/img1.jpg"/>
<img name="grafico-betfair-test" src="/img2.jpg"/>
·
Juan Pablo Isaza
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