使用Java脚本更改背景颜色并在刷新页面后保留 [英] Changing Background colour with Javascript and keeping it after refreshing the page

问题描述

使用Java单击按钮时，我正在更改背景的颜色.

I'm changing the colour of the background when a button is clicked with Javascript.

这是JS代码:

<script>
function myFunction() {
    document.body.style.backgroundColor = "#BB0A21";
}
</script>

它可以正常工作，但是问题在于，当用户刷新页面时，背景色被重置为原始颜色.有办法阻止这种情况发生吗?

It works fine, but the problem is that when the user refreshes the page, the background colour is being reset to the original colour. Is there a way to stop this from happening?

谢谢， 丽莎

推荐答案

您可以将颜色更改存储在本地会话中.您需要检查会话是否已经具有该值，如果没有，请进行设置.这将在页面刷新等情况下继续存在

you can store the colour change in a local session. You'll need to check if the session already has the value, setting it if not. this will survive page refreshes etc

    function myFunction() {
        if (sessionStorage.getItem('colour')) {
            document.body.style.backgroundColor = sessionStorage.getItem('colour');
        }else{
            document.body.style.backgroundColor =  "#BB0A21";
            sessionStorage.setItem('colour', "#BB0A21");
        }
    }

  // then you'll need to call your function on page load
  myFunction();

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