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  1. Implement 'once' event listener option

    The DOM Standard defines a 'once' option for addEventListener() which causes the callback to only be called once, upon the next occurrence of the given event type, after which the listener gets automatically removed:
    https://dom.spec.whatwg.org/#dom-addeventlisteneroptions-once

    The effect is similar to jQuery's popular $.one() method.

    CanIUse entry: http://caniuse.com/#feat=once-event-listener
    MDN article: https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Parameters

    161 votes
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      0 comments  ·  Document Object Model (DOM)  ·  Flag idea as inappropriate…  ·  Admin →
    • Iterable NodeLists

      Edge is now the only browser without support for iterable nodelists. (Chrome, Firefox, Opera, & Safari TP all have it). By iterable nodelists I mean defining `NodeList.prototype[Symbol.iterator]` so that you can spread nodelists like `[...document.body.children]`.

      This boils down to implementing something like:
      NodeList.prototype[Symbol.iterator] = Array.prototype[Symbol.iterator];

      Related:
      https://github.com/whatwg/dom/issues/284
      https://bugs.chromium.org/p/chromium/issues/detail?id=401699
      https://bugzilla.mozilla.org/show_bug.cgi?id=1290636

      159 votes
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        1 comment  ·  Document Object Model (DOM)  ·  Flag idea as inappropriate…  ·  Admin →
      • 283 votes
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          2 comments  ·  Document Object Model (DOM)  ·  Flag idea as inappropriate…  ·  Admin →
        • Support .remove() method on DOM elements.

          Support .remove() method on DOM elements

          26 votes
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            Completed  ·  2 comments  ·  Document Object Model (DOM)  ·  Flag idea as inappropriate…  ·  Admin →
          • Remove element.runtimeStyle

            element.runtimeStyle is non-standard, unnecessary and unintuitive.

            - It doesn't match any standard or any other browser.

            - We already have the `style` attribute on elements.

            - If I clone elements with any runtimeStyles set then the clones also get the runtimeStyles. But if I copy the elements using an `.innerHTML` (or similar) approach then the runtimeStyle is not copied.

            6 votes
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              1 comment  ·  Document Object Model (DOM)  ·  Flag idea as inappropriate…  ·  Admin →
            • support document.currentScript property

              I looking for a way to know where has my script been loaded.
              The most suprising thing that I could emulate this property through script.readyState, but until IE10, later it has been removed.
              Spec: https://html.spec.whatwg.org/multipage/dom.html#dom-document-currentscript
              MDN: https://developer.mozilla.org/en-US/docs/Web/API/document.currentScript

              158 votes
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                5 comments  ·  Document Object Model (DOM)  ·  Flag idea as inappropriate…  ·  Admin →
              • Support document.baseURI property

                Support the standard property document.baseURI. Internet Explorer is the only browser that doesn't.

                See: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
                Also: http://www.w3schools.com/jsref/prop_doc_baseuri.asp

                8 votes
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                  0 comments  ·  Document Object Model (DOM)  ·  Flag idea as inappropriate…  ·  Admin →
                • Function.length returns required parameter counts for DOM APIs

                  DOM functions currently return 0 when queried for length. While browsers implement the number of required parameters differently due to differences in their optional parameters and values, it would help determine differences between browsers if we could compare functions required parameter counts across browsers.

                  3 votes
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                    0 comments  ·  Document Object Model (DOM)  ·  Flag idea as inappropriate…  ·  Admin →
                  • Make developer more like Chrome and Firefox

                    Make developer more like Chrome and Firefox, where clicking on a line in the elements section highlights that section on the page.

                    1 vote
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                      1 comment  ·  Document Object Model (DOM)  ·  Flag idea as inappropriate…  ·  Admin →
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