Databases
StackOverflow2013
Postsdbo
POempty event listener: Is this ok?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POempty event listener: Is this ok?
    primarykey
    data
    text
    <p><strong>Some Quick Background</strong></p> <p>I'm building an iOS app that uses html web views in some areas. I wanted to make sure the html buttons on those pages looked and felt as much like iOS buttons as possible. To accomplish this, I wanted a tap state so the html button depressed when tapped. Now in HTML this is easy. You just set a style for :active or :hover or whatever. I actually had this defined already. In iOS, however, those states don't engage on tap – at least normally. So my goal was to write a little script that added a class to the button to change its appearance ontouchstart.</p> <p><strong>The Issue</strong></p> <p>However, it turns out I didn't need to get that complicated...by pure accident I ran a test with the following code:</p> <pre><code>document.addEventListener('touchstart', function(event) { console.log("test"); }, true); </code></pre> <p>I'm pretty green with javascript &amp; jQuery, so all I intended on doing was checking my syntax and making sure the eventListener fired when I tapped the button. To my surprise, the button's :active states in the css fired (as well as the :hover states). That code...solved my problem!</p> <p><strong>My Question</strong></p> <p>So here's my question: Is the above code valid? I mean, is it bad to do this? It's as if the empty eventListener just triggered behavior that desktop browsers already offer. Is there anything wrong with using this method? I'm green, but I don't want to pick up bad habits. If this is a bad way to code I don't want to use it.</p> <p>Thanks for any insight you guys can give me into this!</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. USDavid Vasquez
    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. VO
      singulars
      1. POempty event listener: Is this ok?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POempty event listener: Is this ok?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COyou can have empty event listeners if you want but I think console.log() will give a js error in IE
      singulars
      1. POempty event listener: Is this ok?
      1. USHuangism
    2. COThere's nothing wrong with empty listeners. But every listener you have adds that tiny bit of overhead that you probably shouldn't care about. It's important to check for `console` and `console.log` because they may not be available unless a debugging console is open (like Firebug or Developer Tools) - not based on browser.
      singulars
      1. POempty event listener: Is this ok?
      1. USIan
    3. COI'm all about keeping code lean and mean. For the purposes of this post I left the console.log command in the code to illustrate my original intent. Afterwards, I did remove it and simply left the event listener completely empty.
      singulars
      1. POempty event listener: Is this ok?
      1. USDavid Vasquez
 

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