为什么我使用 setTimeout 时方法会立即执行?

2022-01-29 00:00:00 javascript settimeout

我正在尝试使用 setTimeout 编写一个简单的代码，但是 setTimeout 不会等待它应该等待的时间并且代码会立即执行.我做错了什么?

I'm trying to write a simple code with a setTimeout, but the setTimeout just won't wait the time it's supposes to and the code execute immediately. What am I doing wrong?

setTimeout(testfunction(), 2000);

推荐答案

您正在立即调用该函数并安排其返回值.

You're calling the function immediately and scheduling its return value.

用途:

setTimeout(testFunction, 2000);
                       ^

注意:没有括号.

相关文章