Databases
StackOverflow2013
Postsdbo
POHow to check table for new content, and then update browser tab title?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to check table for new content, and then update browser tab title?
    primarykey
    data
    text
    <p>I am working on a way to flash a browser tab when a new message appears in a table. I have the flashing of the tab part working, my only problem is that I can't seem to get it to flash when a message is received (which is the whole point of my exercise :) )</p> <p>The <code>newMessage()</code> function is working fine, I just can't seem to get the <code>notification()</code> function to work.</p> <p>My code is as follows:</p> <pre><code>function newMessage() { var oldTitle = "Your Page"; var msg = "New Message"; var timeout = setInterval(function() { document.title = document.title == msg ? '' : msg; }, 1000); window.onmousemove = function() { clearInterval(timeout); document.title = oldTitle; window.onmousemove = null; }; } function notification() { var index = 2; var content = document.getElementById('refreshMessages').childNodes[index]; var content = document.getElementById('refreshMessages').getElementByTagName("tr")[1]; var knownContent = content.toString(); updater.start(); updater2.start(); var newContent = document.getElementById('refreshMessages').childNodes[index]; var newContent = document.getElementById('refreshMessages').getElementByTagName("tr")[1]; if(knownContent != newContent.toString()) { newMessage(); knownContent = newContent; } else if(knownContent = newContent.toString()) { alert("No need to flash title."); } } notification(); </code></pre> <p>In the <code>notification()</code> function, I am trying to call the <code>newMessage()</code> function by comparing the strings at the appropiate cell in the table.</p> <p>I put the <code>alert()</code> into the else if just to see if it would be called, but it does not happen. <code>update.start()</code> and <code>update2.start()</code> are carried out however, as I can see the messages appearing in the table.</p> <p>I would be happier to use JavaScript but I am open to jQuery also.</p> <p>My JavaScript is very very rusty so excuse me if I have made any silly mistakes!</p> <p>Thanks,</p> <p>Chuck</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USchuckliddell0
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COI can't tell what the problem is without seeing the html, but you are calling `.toString()` on an html element which is a little peculiar and you have a double declaration of `newContent` and `content` which means the first one is basically ignored... what is supposed to be happening here?
      singulars
      1. POHow to check table for new content, and then update browser tab title?
      1. USckozl
    2. COGuessing the code should work(even with the weirdness pointed by ckozl) and your code is in the head section the problem is that the code is executed before the DOM tree is ready and all your `document.getElementById` return `null`, trying to call a method on null raises an error. Try to change your call `notification();` to `window.onload = function(){ notification(); };`.
      singulars
      1. POHow to check table for new content, and then update browser tab title?
      1. USPrusse
    3. COI believe modern day browsers queue up/pause setInterval when the tab is not focused. [MDN setTimeout](https://developer.mozilla.org/en/DOM/window.setTimeout)
      singulars
      1. POHow to check table for new content, and then update browser tab title?
      1. USepascarello
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload