存储setInterval的值 [英] storing the value of setInterval

问题描述

如果我有这样的代码

count=0
count2=setInterval('count++',1000)

count2变量总是设置为2而不是count的实际值，因为它每秒增加

the count2 variable would always set as 2 not the actual value of count as it increases every second

我的问题是：你甚至可以存储seInterval（）方法的值

my question is: can you even store the value of the seInterval() method

推荐答案

setInterval（）的返回值是一个ID号，可以传递给clearInterval（）以阻止定期执行的函数再次运行。这是一个例子：

The return value of setInterval() is an ID number that can be passed to clearInterval() to stop the periodically executed function from running another time. Here's an example of that:

var id = setInterval(function() {
    // Periodically check to see if the element is there
    if(document.getElementById('foo')) {
        clearInterval(id);
        weAreReady();
    }
}, 100);

在你的例子中，如果你想要 count2 要获得与count相同的值，您可以使用：

In your example, if you want count2 to have the same value as count, you could use:

var count = 0, count2 = 0;
setInterval(function() {
    // I wrote this on two lines for clarity.
    ++count;
    count2 = count;
}, 1000);

这篇关于存储setInterval的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！