writable: false means no code can reassign window.Audio to a different value. configurable: false means no code can even call Object.defineProperty again to change those settings. If fermaw’s initialisation code tried to restore the original Audio constructor (a perfectly sensible defensive move) the browser would either fail or throw a TypeError. The hook was permanent for the lifetime of the page.
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Every Tuesday, Guardian rugby writer Robert Kitson gives his thoughts on the headlines, scrutinises the latest matches and provides gossip from behind the scenes in his unique and indomitable style. See the latest edition here.
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