JavaScript，任何人都知道这段代码有什么问题吗？

Question

我正在使用javascript为我的管理面板创建一个黑暗模式切换，有时当我转到另一个页面时，背景将是白色的瞬间。

有时，当我多次点击它时，复选框会有一点错误。

有谁知道它有什么问题吗？

谢谢！

var mode = "default";
function swapStyleSheet(){
	var pagestyle = document.getElementById('pagestyle');
	var lightSwitch = document.getElementById('lightSwitch');
	if(mode == "default"){
		pagestyle.setAttribute('href', '../css/dark.css');
	    lightSwitch.title = "Turn the lights back on";
		mode = "dark";
	} else {
		pagestyle.setAttribute('href', '../css/light.css');
	    lightSwitch.title = "Turn the lights off";
		mode = "default";
	}
}


function save(){
    var checkbox = document.getElementById('lightSwitch');
    localStorage.setItem('lightSwitch', checkbox.checked);
	load();
	//might be fixed by turning load() on (fix this later (glitch makes it so css doesnt load for a sec sometimes and shows white background for split second, (removed buttons(also that when you click save whilst its already activated it will deactive).
}

function load(){    
    var checked = JSON.parse(localStorage.getItem('lightSwitch'));
    document.getElementById("lightSwitch").checked = checked;
		if (document.getElementById("lightSwitch").checked = checked) {
		swapStyleSheet();
	}
}

function restore(){
    location.reload();
    localStorage.clear()
}


load();

CSS in header:

<link rel="stylesheet" type="text/css" id="pagestyle" href="../css/light.css?parameter=1">


HTML checkbox to activate/deactivate the darkmode

Dark mode: <input type="checkbox" id="lightSwitch" onclick="save()" onmousedown="save()">

Answer 1

你的address功能有点混乱：

首先，您将load设置为等于#lightSwitch.checked，然后再次进行设置：

checked

简化，您的代码执行此操作：

function load(){    
    var checked = JSON.parse(localStorage.getItem('lightSwitch'));
    document.getElementById("lightSwitch").checked = checked;
    if (document.getElementById("lightSwitch").checked = checked) {
        swapStyleSheet();
    }
}

您可能希望在 var x = true/false; someproperty = x; if (someproperty = x) doSomething(); 条件之后进行分配，并且if不应包含作业：

if