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| export let supportsPassive = false
| try {
| const opts = {}
| Object.defineProperty(opts, 'passive', ({
| get () {
| /* istanbul ignore next */
| supportsPassive = true
| }
| })) // https://github.com/facebook/flow/issues/285
| window.addEventListener('test-passive', null, opts)
| } catch (e) {}
|
|
