www.webdeveloper.com
Results 1 to 4 of 4

Thread: Fade-out text when spacebar is pressed?

  1. #1
    Join Date
    Nov 2012
    Posts
    5

    Fade-out text when spacebar is pressed?

    Hi all,

    I'm a beginner at JS and I'd like to write a code where, when the spacebar is pressed, a line of text fades into the screen. When the spacebar is pressed again, that line of text fades out and a new line of text fades in, and so on.

    Any help would be appreciated. Thanks all!

  2. #2
    Join Date
    Jun 2004
    Location
    Portsmouth UK
    Posts
    2,709
    you could use fade

    Code:
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
    
    <head>
      <title></title>
    </head>
    
    <body>
    <div id="tst" style="position:relative;width:50px;" >Word</div>
    
    
    <script type="text/javascript">
    
    
    function zxcFadeWord(o){
     this.obj=document.getElementById(o.ID);
     this.ary=o.WordArray;
     this.ms=o.FadeDuration;
     this.cnt=0;
     this.run=true;
     this.addevt(document,'keypress','space');
     this.addevt(document,'keydown','space');
    }
    
    zxcFadeWord.prototype={
    
     space:function(e){
      var char=e.which?e.which:event.keyCode ;
      if (char==32&&this.run){
       this.run=false;
       clearTimeout(this.dly);
       this.fade(this.obj,100,0,new Date(),this.ms);
      }
     },
    
     fade:function(obj,f,t,srt,mS){
      var oop=this,ms=new Date().getTime()-srt,now=(t-f)/mS*ms+f;
      if (isFinite(now)){
       obj.style.filter='alpha(opacity='+now+')';
       obj.style.opacity=obj.style.MozOpacity=obj.style.WebkitOpacity=obj.style.KhtmlOpacity=now/100-.001;
      }
      if (ms<mS){
       oop.dly=setTimeout(function(){ oop.fade(obj,f,t,srt,mS); },10);
      }
      else if (t==0){
       oop.cnt=++oop.cnt%oop.ary.length;
       obj.innerHTML=oop.ary[oop.cnt];
       this.fade(obj,0,100,new Date(),this.ms);
      }
      else {
       oop.run=true;
      }
     },
    
     addevt:function(o,t,f,p){
      var oop=this;
      if (o.addEventListener){
       o.addEventListener(t,function(e){ return oop[f](e,p);}, false);
      }
      else if (o.attachEvent){
       o.attachEvent('on'+t,function(e){ return oop[f](e,p); });
      }
     }
    
    
    }
    
    new zxcFadeWord({
     ID:'tst',
     WordArray:['Tom','Dick','Harry'],
     FadeDuration:1000
    });
    
    
    
    </script>
    </body>
    
    </html>
    but color is better

    Code:
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
    
    <head>
      <title></title>
    </head>
    
    <body>
    <span id="tst" >Word</span>
    
    <script type="text/javascript">
    
    
    function zxcFadeWord(o){
     this.obj=document.getElementById(o.ID);
     this.ary=o.WordArray;
     this.ms=o.FadeDuration;
     this.fin=o.FadeIn;
     this.fout=o.FadeOut;
     this.cnt=0;
     this.run=true;
     this.addevt(document,'keypress','space');
     this.addevt(document,'keydown','space');
    }
    
    zxcFadeWord.prototype={
    
     space:function(e){
      var char=e.which?e.which:event.keyCode ;
      if (char==32&&this.run){
       this.run=false;
       clearTimeout(this.dly);
       this.fade(this.obj,this.fin,this.fout,new Date(),this.ms,true);
      }
     },
    
     fade:function(obj,f,t,srt,mS,nxt){
      var oop=this,ms=new Date().getTime()-srt,now=[],z0=0//=(t-f)/mS*ms+f;
      for (;z0<3;z0++){
       now[z0]=Math.round((t[z0]-f[z0])/mS*ms+f[z0]);
      }
      if (isFinite(now[0])&&isFinite(now[1])&&isFinite(now[2])){
       obj.style.color='rgb('+now[0]+','+now[1]+','+now[2]+')';
      }
      if (ms<mS){
       oop.dly=setTimeout(function(){ oop.fade(obj,f,t,srt,mS,nxt); },10);
      }
      else {
       obj.style.color='rgb('+t[0]+','+t[1]+','+t[2]+')';
       if (nxt){
        obj.innerHTML=oop.ary[oop.cnt];
        oop.fade(obj,oop.fout,oop.fin,new Date(),this.ms,false);
        oop.cnt=++oop.cnt%oop.ary.length;
       }
       else {
        oop.run=true;
       }
      }
     },
    
     addevt:function(o,t,f,p){
      var oop=this;
      if (o.addEventListener){
       o.addEventListener(t,function(e){ return oop[f](e,p);}, false);
      }
      else if (o.attachEvent){
       o.attachEvent('on'+t,function(e){ return oop[f](e,p); });
      }
     }
    
    
    }
    
    new zxcFadeWord({
     ID:'tst',
     WordArray:['Tom','Dick','Harry'],
     FadeIn:[0,0,0],
     FadeOut:[255,255,255],
     FadeDuration:1000
    });
    
    
    </script>
    </body>
    
    </html>
    Vic

    God loves you and will never love you less.

    http://www.vicsjavascripts.org/Home.htm
    If my post has been useful please donate to http://www.operationsmile.org.uk/

  3. #3
    Join Date
    Nov 2012
    Posts
    5
    Thanks for your reply!

    Sorry for my inexpertise, but I pasted the code (both of them) into two separate Notepad documents and saved them as HTML files, but when opened in a browser they only display 'Word' and nothing happens when I click the screen. Did I do something wrong?

    Thanks again

  4. #4
    Join Date
    Nov 2012
    Posts
    5
    My bad, I tried it on my other laptop (my first laptop had a semi-broken keyboard, hence the spacebar didn't work) and it works perfectly with the spacebar.

    Thank you very much phillips!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
HTML5 Development Center

"

"

X vBulletin 4.2.2 Debug Information

  • Page Generation 0.31437 seconds
  • Memory Usage 2,860KB
  • Queries Executed 13 (?)
More Information
Template Usage (33):
  • (1)SHOWTHREAD
  • (1)ad_footer_end
  • (1)ad_footer_start
  • (1)ad_global_above_footer
  • (1)ad_global_below_navbar
  • (1)ad_global_header1
  • (1)ad_global_header2
  • (1)ad_navbar_below
  • (1)ad_showthread_firstpost_sig
  • (1)ad_showthread_firstpost_start
  • (1)ad_thread_first_post_content
  • (1)ad_thread_last_post_content
  • (2)bbcode_code
  • (1)footer
  • (1)forumjump
  • (1)forumrules
  • (1)gobutton
  • (1)header
  • (1)headinclude
  • (1)headinclude_bottom
  • (4)memberaction_dropdown
  • (1)navbar
  • (4)navbar_link
  • (1)navbar_moderation
  • (1)navbar_noticebit
  • (1)navbar_tabs
  • (2)option
  • (4)postbit
  • (4)postbit_onlinestatus
  • (4)postbit_wrapper
  • (1)spacer_close
  • (1)spacer_open
  • (1)tagbit_wrapper 

Phrase Groups Available (6):
  • global
  • inlinemod
  • postbit
  • posting
  • reputationlevel
  • showthread
Included Files (26):
  • ./showthread.php
  • ./global.php
  • ./includes/class_bootstrap.php
  • ./includes/init.php
  • ./includes/class_core.php
  • ./includes/config.php
  • ./includes/functions.php
  • ./includes/functions_navigation.php
  • ./includes/class_friendly_url.php
  • ./includes/class_hook.php
  • ./includes/class_bootstrap_framework.php
  • ./vb/vb.php
  • ./vb/phrase.php
  • ./includes/functions_facebook.php
  • ./includes/functions_calendar.php
  • ./includes/functions_bigthree.php
  • ./includes/class_postbit.php
  • ./includes/class_bbcode.php
  • ./includes/functions_reputation.php
  • ./includes/functions_notice.php
  • ./packages/vbattach/attach.php
  • ./vb/types.php
  • ./vb/cache.php
  • ./vb/cache/db.php
  • ./vb/cache/observer/db.php
  • ./vb/cache/observer.php 

Hooks Called (70):
  • init_startup
  • friendlyurl_resolve_class
  • init_startup_session_setup_start
  • database_pre_fetch_array
  • database_post_fetch_array
  • init_startup_session_setup_complete
  • global_bootstrap_init_start
  • global_bootstrap_init_complete
  • cache_permissions
  • fetch_threadinfo_query
  • fetch_threadinfo
  • fetch_foruminfo
  • load_show_variables
  • load_forum_show_variables
  • global_state_check
  • global_bootstrap_complete
  • global_start
  • style_fetch
  • global_setup_complete
  • showthread_start
  • showthread_getinfo
  • strip_bbcode
  • friendlyurl_clean_fragment
  • friendlyurl_geturl
  • forumjump
  • cache_templates
  • cache_templates_process
  • template_register_var
  • template_render_output
  • fetch_template_start
  • fetch_template_complete
  • parse_templates
  • fetch_musername
  • notices_check_start
  • notices_noticebit
  • process_templates_complete
  • friendlyurl_redirect_canonical
  • showthread_post_start
  • showthread_query_postids
  • showthread_query
  • bbcode_fetch_tags
  • bbcode_create
  • showthread_postbit_create
  • postbit_factory
  • postbit_display_start
  • postbit_imicons
  • bbcode_parse_start
  • bbcode_parse_complete_precache
  • bbcode_parse_complete
  • postbit_display_complete
  • memberaction_dropdown
  • tag_fetchbit_complete
  • forumrules
  • navbits
  • navbits_complete
  • build_navigation_data
  • build_navigation_array
  • check_navigation_permission
  • process_navigation_links_start
  • process_navigation_links_complete
  • set_navigation_menu_element
  • build_navigation_menudata
  • build_navigation_listdata
  • build_navigation_list
  • set_navigation_tab_main
  • set_navigation_tab_fallback
  • navigation_tab_complete
  • fb_like_button
  • showthread_complete
  • page_templates