阻止JavaScript函数运行两次(setTimeout)

Question

我有这个功能运行几秒钟使用setTimeout.单击按钮时会运行此功能.

function complete() {
    var div = document.getElementById('log');
    setTimeout(function(){ div.innerHTML = div.innerHTML + intro[Math.floor(Math.random() * intro.length)] + "<br>"; }, 500);
    setTimeout(function(){ div.innerHTML = div.innerHTML + second[Math.floor(Math.random() * second.length)] + "<br>"; }, 2560);
    setTimeout(function(){ div.innerHTML = div.innerHTML + third[Math.floor(Math.random() * third.length)] + "<br>"; }, 4860);
    setTimeout(function(){ div.innerHTML = div.innerHTML + fourth[Math.floor(Math.random() * fourth.length)] + "<br>"; }, 7860);
    setTimeout(function(){ div.innerHTML = div.innerHTML + fifth[Math.floor(Math.random() * fifth.length)] + "<br>"; }, 9640);
}

但是,如果用户多次单击该按钮,则此功能也会开始多次执行.我试图通过使用下面的代码来防止这种情况发生,但是,它无法正常工作.

var running;
function complete() {
    if (running == true) { alert('error'); }
    running = true;
    var div = document.getElementById('log');
    setTimeout(function(){ div.innerHTML = div.innerHTML + intro[Math.floor(Math.random() * intro.length)] + "<br>"; }, 500);
    setTimeout(function(){ div.innerHTML = div.innerHTML + second[Math.floor(Math.random() * second.length)] + "<br>"; }, 2560);
    setTimeout(function(){ div.innerHTML = div.innerHTML + third[Math.floor(Math.random() * third.length)] + "<br>"; }, 4860);
    setTimeout(function(){ div.innerHTML = div.innerHTML + fourth[Math.floor(Math.random() * fourth.length)] + "<br>"; }, 7860);
    setTimeout(function(){ div.innerHTML = div.innerHTML + fifth[Math.floor(Math.random() * fifth.length)] + "<br>"; }, 9640);
    running = false;
}

我应该采取什么方法,或者如何修复我的代码以便它可以完成我想要做的事情？

Answer 1

你running = false;应该在内部超时功能,因为超时将异步执行,running = false;将在超时结束前执行

一个简单的例子就是

var running = false,
    div = document.getElementById('response'),
    limit = 5,
    current = 0;

$('#trigger').click(function () {
    if (running === true) {
        alert('Error: The cycle was running. Aborting.');
        running = false;
        return false;
    }
    running = true;
    var end = setInterval(function () {
        if (current >= limit || running == false) {
            running = false;
            clearInterval(end);
        }
        div.innerHTML += 'Hello World<br />';
        current++;
    }, 500);

});

JSFiddle示例