Path: csiph.com!aioe.org!news.mb-net.net!open-news-network.org!.POSTED.69.235.197.178.dynamic.wless.lssmb00p-cgnat.res.cust.swisscom.ch!not-for-mail From: Thomas 'PointedEars' Lahn Newsgroups: comp.lang.javascript Subject: Re: cloneNode Date: Wed, 09 Aug 2017 23:43:32 +0200 Organization: PointedEars Software (PES) Lines: 60 Message-ID: <2417962.mvXUDI8C0e@PointedEars.de> References: <6gyruqx829y4$.1lpqy2p7ncjve$.dlg@40tude.net> Reply-To: Thomas 'PointedEars' Lahn Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8Bit Injection-Info: gwaiyur.mb-net.net; posting-host="69.235.197.178.dynamic.wless.lssmb00p-cgnat.res.cust.swisscom.ch:178.197.235.69"; logging-data="665"; mail-complaints-to="abuse@open-news-network.org" User-Agent: KNode/4.14.2 X-User-ID: U2FsdGVkX19vHaIMpx2ZS0oAO8fZSjoMGdems6eRvZQABKCrmhR1rg== Face: 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 Cancel-Lock: sha1:qJfo8YhcLGWhd5GbpiPO5lvPA/Y= X-Face: %i>XG-yXR'\"2P/C_aO%~;2o~?g0pPKmbOw^=NT`tprDEf++D.m7"}HW6.#=U:?2GGctkL,f89@H46O$ASoW&?s}.k+&. On Tue, 8 Aug 2017 12:25:50 -0700 (PDT), justaguy wrote: >> I wonder if there's any way such as inserting a new element with id to a >> cloned node? Thus, to be able to differentiate them. > > Yes. Just assign a new unique ID to the new element after it's created. It > might be good to use randomly generated ID. e.g. > > var newID = ("button_" + (new Date()).valueOf()) + > Math.trunc(Math.random() * 1000000); > > You might want to keep track of the IDs in an array so that you can access > that new element. Or better, keep the element reference rather than its > ID. The built-in `Date` prototype method that should be called here is `getTime`, not `valueOf`, although both return (and have always returned) the same value. vs. The `Math` object has a built-in `trunc` method only in newer ECMAScript implementations. Therefore, the methods used to produce a uniformly distributed pseudo-random integer should be `floor` or `ceil`: vs. As one can see there, the advantages of calling the `trunc` method instead of the `floor` method are negligible; the disadvantages are important. “1e6” might be easier to read than “1000000”. However, it is much better *here* not to rely on either value, but to use a custom counter (if that; I can only think of separate `label` elements in siblings as a valid reason). If all elements have the same name, but should have different IDs, the current counter value is easily obtained through the `length` property of the corresponding HTMLCollection. For 1-based counting: /* * Makes `newID` “button_4” if there are already 3 controls named * “button” in the form represented by the object referred to by `f` */ var newID = "button_" + (f.elements["button"].length + 1); [The ID prefix does not have to be the same as the name.] -- PointedEars FAQ: | | Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.