setInterval（）只运行一次函数 [英] setInterval() only running function once

问题描述

我想定期查询PHP脚本以获取新消息。为此，我使用了setInterval（）函数和AJAX。

I want to periodically query a PHP script for new messages. To do so, I'm using the setInterval() function and AJAX.

$(document).ready(function(){

    var queryInterval = 1000; /* How fast we query for new messages */

    setInterval(getMessages(), queryInterval);

    function getMessages() {
        console.log("tick");
    }

});

但是，当我查看Javascript控制台时，我只看到滴答一次。我已经确保控制台不会再忽略相同字符串的日志，所以如果代码工作正常，它应该每秒在控制台中显示tick。

However, when I look at the Javascript console, I'm only seeing "tick" once. I've made sure that the console doesn't ignore any more logs of the same strings, so if the code was working properly it should show "tick" in the console every second.

任何人都知道这里可能出现什么问题？

Anyone know what could be going wrong here?

推荐答案

更改：

setInterval(getMessages(), queryInterval);

收件人：

setInterval(getMessages, queryInterval);

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