• littledan's avatar
    Add @@species/better subclassing support to Promises · 56914501
    littledan authored
    This patch makes Promise.prototype.then use @@species as specified
    in ES2015. The fix is hoped for by certain users, such as legacy
    core.js versions which encounter an unhandled Promise reject (complete
    with an ugly console message) when Promise subclassing is supported
    in a mostly correct way, and we do error checking on Promise
    constructors, but @@species is not supported.
    
    BUG=chromium:575314,v8:4633
    LOG=Y
    R=adamk
    
    Review URL: https://codereview.chromium.org/1577223002
    
    Cr-Commit-Position: refs/heads/master@{#33225}
    56914501
promise-species.js 1.33 KB