CODEWITHSUNDEEP
javascripthtml
user1319236
user1319236

Reputation:

Browse a webpage's tags

I want to browse all the links (of a webpage) that contain a specific attribute (e.g all the "a" tags that has the attribute "title".
How can i do this ?

Upvotes: 0

Views: 63

Answers (2)

Elias Van Ootegem
Elias Van Ootegem

Reputation: 76408

How about the nodes list that is a default property of the document object document.links, you can iterate that, like so:

for (var i=0;i<document.links.length;i++)
{
    if (document.links[i].hasOwnProperty('title'))
    {
        linksWithTitle.push(document.links[i]);
    }
}

or any variaton on this theme

Edit

I did some digging, perhaps an alternative approach would be using a treewalker:

function byTitle(node)
{
    if (node.hasOwnProperty('title'))
    {
        return NodeFilter.FILTER_ACCEPT;
    }
    return NodeFilter.FILTER_SKIP;
}

function getElementsWithTitle(root)
{
    root = root || document.links;
    var treeWalker,result;
    treeWalker = document.createTreeWalker(root,NodeFilter.SHOW_ELEMENT,byTitle,false);
    result = [treeWalker.currentNode];
    while(treeWalker.nextNode())
    {
        result.push(treeWalker.currentNode);
    }
    return result;
}

There's a lot more to treeWalkers and NodeFilters/NodeLists than this, but this is a nice introduction to the whole concept.

Lastly, if you don't care about IE compatibility: document.querySelectorAll('a[title]'); will do the trick

Upvotes: 0

Danilo Valente
Danilo Valente

Reputation: 11352

var links = document.getElementsByTagName('a'),//Or also document.links
withTitle = [];
for(varn=0;n<links.length;n++)
    if(links[n].getAttribute('title'))
        withTitle.push(links[n]);

Or with jQuery:

var withTitle = $('a[title]');

Upvotes: 3

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