javascript - Using getNext() with Mootools -

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i'm trying autocompleter in mootools 1.11. works fine cant check if

this.selectel.getnext()

is null or whatever. firebug outputs [li] every element , [null] non existing element output via getnext();

i saw people doing:

if(this.selectel.getnext()) {...

but thats not working here because null object. terribly stupid must going on here...

here comes code around problem:

this.selectel = $$('ul.results').getfirst();  ...  oncommand: function(e, mouse) {     if (e.key && !e.shift) {          switch (e.key) {             case 'up':                                   this.selectel.getprevious().addclass('active');                 if(this.selectel) this.selectel.removeclass('active');                 this.selectel = this.selectel.getprevious();                 e.stop();              return;              case 'down':                 var test = this.selectel.getnext();                 console.log(typeof(test));                  if(this.selectel.getnext() != null) {  // not working                      this.selectel.getnext().addclass('active');                     if(this.selectel) this.selectel.removeclass('active');                     this.selectel = this.selectel.getnext();                 }                 e.stop();              return;          }     }

your calling getnext() twice.

replace these lines:

if(this.selectel.getnext() != null) {  // not working    this.selectel.getnext().addclass('active');    if(this.selectel) this.selectel.removeclass('active');    this.selectel = this.selectel.getnext(); }

with:

if(el = this.selectel.getnext() != null) {  // not working    el.addclass('active');    if(this.selectel) this.selectel.removeclass('active');    this.selectel = el; }

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