location.reload()，JavaScript，HTML [英] location.reload(), Javascript,HTML

问题描述

当我尝试在HTML文件中的按钮中使用以下代码时，我总是遇到问题.

onClick=window.location.reload();
mapGenerator();

页面重新加载，但未显示构成D3JS视图的javascript(mapGenerator).我在做什么错了?

解决方案

location.reload()将立即重新加载页面并阻止执行以下任何代码.

但是，您可以创建一个函数，该函数在页面(重新)加载后执行 :

window.onload = function() {
    mapGenerator();
};

此方法将在页面完全加载后每 次运行.若要仅在使用location.reload()重新加载页面后运行代码，可以创建一种方法来处理点击，方法是设置cookie，然后重新加载页面.

function handleClick() {
    document.cookie="reload=true";
    location.reload();
}

这将需要您将onClick值更改为onClick="handleClick();".现在，每当页面加载时，您都可以检查cookie是否已设置.您的window.onload函数现在更改为:

window.onload = function() {
    if(document.cookie.indexOf("reload") >= 0) {
        mapGenerator();
    }
}

检查是否存在cookie-Michael Berkowski的答案

在重新加载后，是否要取消设置cookie由您决定-如果不希望，则页面将在每次加载页面时运行mapGenerator函数，直到cookie过期.

如果您需要有关Cookie的更多帮助，请查看 W3Schools的教程. /p>

I'm having a problem always when I try to use the following code in a button in my HTML file.

onClick=window.location.reload();
mapGenerator();

The page reloads but the javascript (mapGenerator) that make a D3JS view doesn't appear. What am I doing wrong?

解决方案

location.reload() will immediately reload the page and prevent any following code to execute.

You can, however, create a function that executes your method after the page has (re)loaded:

window.onload = function() {
    mapGenerator();
};

This method will run every time the page has fully loaded. To only run the code after you have reloaded the page using location.reload(), you could create a method that handles the click by setting a cookie and then reloading the page.

function handleClick() {
    document.cookie="reload=true";
    location.reload();
}

This would require you to change your onClick value to onClick="handleClick();". Now, whenever the page loads, you can check whether the cookie has been set. Your window.onload function now changes to this:

window.onload = function() {
    if(document.cookie.indexOf("reload") >= 0) {
        mapGenerator();
    }
}

Checking if a cookie exists - answer by Michael Berkowski

After the reload it's up to you whether you want to unset the cookie — if you don't, the page will run the function mapGenerator on every page load until the cookie expires.

If you need more help with cookies, check out W3Schools' tutorial.

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