Javascript detect variable change after # in address bar

Question

Example:

http://localhost/#view=1

If I want to get that variable "view", I need to get window.location.href, and then split the # and do something more.

This is my question:

<a href="#view=1">View 1</a>
<a href="#view=2">View 2</a>

Is there anyway to detect when View 1 click or view 2 click? For people click on View 2, a function will do for view=2.

OR I must do something like this:

<a href="#view=1" onclick="setview(1);">View 1</a>
<a href="#view=2" onclick="setview(2);">View 2</a>

I want when people copy the link http://localhost/#view=2 and send to there friend, the function setview(2) will be run when their friend visit the URL, and they don't need to click the link.

window.location.hash can give you that directly. You shouldn't have to split your URL. — Anirudh Ramanathan
– Anirudh Ramanathan, Commented Nov 10, 2012 at 17:22
Is there anyway to know onhashchange without use other plugin? — Ken Le
– Ken Le, Commented Nov 10, 2012 at 19:38

Community · Accepted Answer · 2020-06-20 09:12:55Z

4

You can use `hashChange` event

$(function(){
  // Bind the event.
  $(window).hashchange( function(){
    // Alerts every time the hash changes!
    alert( location.hash );
  })

  // Trigger the event (useful on page load).
  $(window).hashchange();
});

And now in the $(window).hashchange(); function, put your code:

$(window).hashchange(function(){
  $(location.hash).show();
});

In your case, it would be:

$(window).hashchange(function(){
  setview(location.hash[strlen(location.hash)-1]); // Get the last character, if this doesn't work.
});

Forgot to add the plugin: http://benalman.com/projects/jquery-hashchange-plugin/, which you would need to use.

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Nov 10, 2012 at 17:24

Praveen Kumar Purushothaman

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4 Comments

charlietfl Over a year ago

there is no shortcut .hashchange() method in jQuery API...need to use on()

Praveen Kumar Purushothaman Over a year ago

I gave the definition for using hashchange with jQuery. It is here: benalman.com/projects/jquery-hashchange-plugin

charlietfl Over a year ago

OK...but that is using a plugin that was not referenced in your solution. Can simply use on() for what you are providing without a plugin

David Thomas Over a year ago

@Ken: $(window).on('hashchange', function(){ /* do stuff */ }); Also: check out the API reference for on().

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You can use `hashChange` event

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You can use `hashChange` event