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web｜beforeunload

~1 min read

當window 準備釋放它的資源時，該事件被觸發。此時文件仍然可見，且事件仍可被取消的。

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當window 準備釋放它的資源時，該事件被觸發。此時文件仍然可見，且事件仍可被取消的。

window.addEventListener("beforeunload", function (event) {
    console.log(window.location.href); // capture the url
    event.preventDefault(); // just to pause and see the condole
});