Vue listens to the browser to refresh and cannot pop up. The code is as follows:
mounted () {
window.addEventListener ("beforeunload", e = > this.beforeunloadHandler (e))
}
destroyed () {
window.removeEventListener (" beforeunload", e = > this.beforeunloadHandler (e))
}
methods: {
beforeunloadHandler (e) {
confirm ("whether to leave")
}
}
confirm and alert will not be executed in this event, see https://developer.mozilla.org.
since May 25, 2011, the HTML5 specification declares that window.showModalDialog (), window.alert (), window.confirm () window.prompt ().can be ignored when the following pop-up-related methods are called in the event handler.
window.onbeforeunload = () = > {this.beforeunloadHandler (e)}
/ / where does e come from? It's no use deleting
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