jquery - Does jQuery .on("click") always run before href fires?

Answer 1

是的，您的处理程序将始终首先运行。例如，这就是允许您在必要时取消默认行为（导航到 href url）的原因

$("a").on("click", function (e) {
   e.preventDefault(); // --> if this handle didn't run first, this wouldn't work
   doSomething();
});

Answer 2

是的，它确实。如果您不希望触发 href，您可以调用e.preventDefault();并且浏览器不会跟随该链接。

Answer 3

是的，但只有在第一个之前运行的部分await：

$("a").on("click", async function(e) {
  example(); // this will always run

  await Promise.resolve();

  example3(); // this may not run, as it is after the first `await`, and it is after nagivation
  e.preventDefault(); // this does not work, as it is after the first `await`
});