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JavaScript Promise.race() 方法
tryjsref_promise_race
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<!DOCTYPE html> <html> <body> <h1>JavaScript Promise Object</h1> <h2>The race() Metod</h2> <p id="demo"></p> <script> // Create a Promise const myPromise1 = new Promise((resolve, reject) => { setTimeout(resolve, 200, "King"); }); // Create another Promise const myPromise2 = new Promise((resolve, reject) => { setTimeout(resolve, 100, "Queen"); }); // Both resolves. Who is faster? Promise.race([myPromise1, myPromise2]).then((x) => { myDisplay(x); }); // Funtion to run when a Promise is settled: function myDisplay(some) { document.getElementById("demo").innerHTML = some; } </script> </body> </html>