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POUsing 'this' inside a callback inside an object literal
 

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  1. POUsing 'this' inside a callback inside an object literal
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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/13996794/javascript-prototype-this-issue">Javascript prototype ‘this’ issue</a> </p> </blockquote> <p>I have an event listener which of course calls a method on an event. This method tries unsuccessfully to hold a reference to the holding objects this so that it can access other properties of the object.</p> <p>There is a single comment denoting where the behavior is not understood. this_hold.Name is not accessible there as I thought it would be.</p> <pre><code>/*MUserExist ** ** ** */ $A.module({ Name: 'MUserExist', S: { ClientStorage: SClientStorage, ComMessage: SComMessage, ComText: SComText, DynSma: SDynSma, DynTwe: SDynTwe, DynArc: SDynArc, AniMorphLabel: SAniMorphLabel, AniFlipPage: SAniFlipPage }, E: { but: $A('#ue_but')[0], text: $A('#ue_go')[0], form: $A('#ue_fo')[0], check: $A('#ue_check')[0] }, J: { box: $('#ue_box') }, init: function () { var pipe = {}, this_hold = this; this.J.box.draggable(); this.E.but.addEventListener("click", function () { pipe = $A.definePipe(this_hold.Name); $A.machine(pipe); }, false); this.E.text.addEventListener("keypress", this.enter, false); this.S.AniMorphLabel.run(["ue_email", "ue_email_lab", "ue_go", "ue_pass_lab" ]); }, enter: function (event) { var pipe = {}, this_hold = this; if (event.keyCode === 13) { pipe = $A.definePipe(this_hold.Name); // fails here what does 'this' point to? $A.machine(pipe); event.preventDefault(); } }, pre: function (pipe) { var form_elements = this.E.form.elements, text_object = new this.S.ComText(form_elements); pipe.enter = this.enter; if ($A.Un.get('load') === '1') { if (!text_object.checkFull()) { pipe.type = 'empty'; return this.S.ComMessage.message(pipe); } if (!text_object.checkPattern('email')) { pipe.type = 'email'; return this.S.ComMessage.message(pipe); } if (!text_object.checkPattern('pass')) { pipe.type = 'pass'; return this.S.ComMessage.message(pipe); } } pipe.page = text_object.getArray(); pipe.proceed = true; pipe.page.remember = this.E.check.checked; return pipe; }, post : function (pipe) { if (pipe.proceed === true) { this.S.ComMessage.resetView('ue_email'); this.S.ComMessage.resetView('ue_go'); this.S.ClientStorage.setAll(pipe.server.smalls); this.S.DynSma.run(pipe.server.smalls); this.S.DynArc.run(pipe.server.arcmarks); this.S.DynTwe.run(pipe.server.tweets); this.S.AniFlipPage.run('ma'); } else { return this.S.ComMessage.message(pipe); } } }); </code></pre>
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    1. COPlease check the possible dupe link, I just answered a very similar question.
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    2. COA simple `console.log(this)` can answer your question and you didn't try
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      1. USAlexander
 

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