jQuery检测元素是否已链接到

Question

I want to attach a jQuery event handler to a <div> element such that whenever a link is clicked which points to this <div> , that handler is activated and the associated function is executed – regardless of the location of the link (same page, other page, other site) pointing to the <div> .

$("div#mydiv").on("linked_to", function(){ //is there a "linked_to" event?
  //do something about it
});

Is this possible? Can scrollIntoView() be used?

Answer 1

What you want is quite specific and borderline undoable. I think your best bet is to detect a hash change in the URL and act accordingly.

You aren't gonna be able to detect that div#mydiv itself was clicked, but detecting the hash #mydiv comes pretty close to it.

You would use something like:

  window.onhashchange = function() {
    if (window.location.hash === '#mydiv') { // here you check if it was `#mydiv`
      alert('hey! are you after mydiv?!')
    }
  }

Check an example here: http://output.jsbin.com/pikifov - click the link and notice how the hash from the URL changes.

Source for the JSBin above here .

Full code:

 <div id="mydiv">mydiv</div> <hr> <a href="#mydiv">Click to go to mydiv</a> <script> window.onhashchange = function() { if (window.location.hash === '#mydiv') { alert('hey! are you after mydiv?!') } } </script>