javascript - 'Promise' is undefined in IE -

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i'm getting 'promise' undefined error in ie. why , how can solve this?

add like

<script src="https://cdnjs.cloudflare.com/ajax/libs/bluebird/3.3.5/bluebird.min.js"></script>

to <head>...</head>

this pull in external bluebird promise library, able use promise on ie


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