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Fix missing drop indicator on Electron >= 1.4 #426
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The security model of new Chromium versions forbids all event listeners, except for `onDragStart` and `onDrop`, to inspect the data values that have been previously set on the event's `dataTransfer` object. To circumvent this problem we can exploit the fact that all we need to do is checking whether a boolean has been set or not. To do so, we will simply list all the items contained in the `dataTransfer` object and read their `type` property (that we use as a dictionary key), verifying that at least one of them contains the key we are searching for.
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The security model of new Chromium versions forbids all event listeners, except for
onDragStartandonDrop, to inspect the data values that have been previously set on the event'sdataTransferobject.To circumvent this problem we can exploit the fact that all we need to do is checking whether a boolean has been set or not. To do so, we will simply list all the items contained in the
dataTransferobject and read theirtypeproperty (that we use as a dictionary key), verifying that at least one of them contains the key we are searching for.Before:
After:
/cc: @atom/maintainers