Created
July 2, 2014 11:47
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How to use when API
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| // This works | |
| frame.addEventListener("load", event => { | |
| // handler | |
| }, true); | |
| // But this doesn't, why? | |
| const { when } = require("sdk/event/utils"); | |
| when("load", frame).then(event => { | |
| // handler | |
| }); | |
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