[Rails-spinoffs] Abstract insertion question

[Peter Michaux]

Hi,

In the following block of Prototype.js when will the catch() block
run? I cannot create conditions in Opera where it will run.

Thanks,
Peter

 if (this.element.insertAdjacentHTML) {
   /* IE and Opera */
   try {
     this.element.insertAdjacentHTML(this.adjacency, this.content);
   } catch (e) {
     // when will this run? can feature detection be used instead?
     var tagName = this.element.tagName.toLowerCase();
     if (tagName === 'tbody' || tagName === 'tr') {
       this.insertContent(this.contentFromAnonymousTable());
     } else {
       throw e;
     }
   }
 }
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