为什么这个while循环无限循环? [英] Why is this while loop looping infinitely?

问题描述

所以我正在为我的研究制作一个网络应用程序，它基本上结合使用 Twitter 的流媒体 API 和谷歌地图来显示 Lat Lng 值.

So i'm making a web app for my studies, it basically uses a combination of Twitter's streaming api and Google Maps to display the Lat Lng values.

Y 是一个元素，表示已收到的推文数量，(检查数组的长度)，X 是另一个元素，它的文本内容每秒递增 1.

Y is an element which states the number of tweets which have been received, ( checks length of an array) and X is another which has it's text content incremented by 1 every second.

• 我只是为它花费的时间设置了一些随机值，我会使用更合乎逻辑的比例(每 60 秒或其他时间).

我想每分钟记录一次这些信息，以制作图表，但不知何故我做了一个无限循环，我不太确定如何.

I wanted to log this information every minute, to make a graph but i've made an infinite loop somehow and i'm not quite sure how.

代码如下:

function saveinfo(){
var x = document.getElementsByClassName('timer')[0].textContent;
var y = document.getElementsByClassName('counter')[0].textContent;
while (x != "510"){
    if(x = "5"){
        console.log(y);

    }
    else if (x = "200") {
        console.log(y);

    }
    else if (x = "300"){
        console.log(y);

    }
    else if (x = "400"){
        console.log(y);

    }
    else if (x = "500"){
        console.log(y);
        x = "510"
    }
}
};

推荐答案

当你的 if 语句被评估时，你正在设置 x:

When your if statements are evaluated, you're setting x:

if(x = "5"){

这意味着 x 永远不会等于 "510"，你的循环将永远持续下去.

This means that x will never equal "510", and your loop will go on forever.

要解决此问题，您应该执行类似 if(x === '5')

To fix this, you should do something like if(x === '5')

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