我正在尝试根据 sessionStorage 项目是否标记为 true 来更改按钮的背景颜色。在下一页的“厨房”页面上，当选中所有按钮时，sessionStorage 项将变为 true，因此当您返回“主页”时，厨房现在标记为绿色而不是红色。至此演出圆满结束。我认为你可以使用 jQuery，但我真的不知道如何使用它。
首页
function loader(){
var form = document.getElementById("myForm");
//error somewhere in here
for(var i=0;i<form.length;i++){
if(sessionStorage.getItem(form.elements[i].value) == "true"){
document.getElementById(form.elements[i].value).style.backgroundColor = "green";
return true;
}else{
document.getElementById(form.elements[i].value).style.backgroundColor = "red";
return false;
}
}
}
function initial(){
if (localStorage.getItem("hasCodeRunBefore") === null) {
var form = document.forms[0];
var tot = document.forms[0].length;
var i;
for(var i = 0; i < tot ; ++i){
document.getElementById(form.elements[i].value).style.backgroundColor = "red";
}
localStorage.setItem("hasCodeRunBefore", true);
}
}
function start(){
initial();
loader();
}
主页 HTML
<body onload="start()">
<header align=center>Home Screen</header>
<p align=center id="result"></p>
<script>
document.getElementById("result").innerHTML = sessionStorage.getItem("currentAddress");
</script>
<ul align=center>
<form id="myForm">
<li>
<input type="button" name="area" id="livingroom" value="Living Room" ><br><br>
<script type="text/javascript">
sessionStorage.setItem("livingroom","false");
document.getElementById("livingroom").onclick = function () {
location.href = "url";
};
</script>
</li>
<li>
<input type="button" name="area" id="kitchen" value="Kitchen"><br><br>
<script type="text/javascript">
sessionStorage.setItem("kitchen","false");
document.getElementById("kitchen").onclick = function () {
location.href = "url";
};
</script>
</li>
<li>
<input type="button" name="area" id="bathroom" value="Bathroom" ><br><br>
<script type="text/javascript">
sessionStorage.setItem("bathroom","false");
document.getElementById("bathroom").onclick = function () {
location.href = "url";
};
</script>
</li>
<li>
<input type="button" name="area" id="dining" value="Dining" ><br><br>
<script type="text/javascript">
sessionStorage.setItem("dining","false");
document.getElementById("dining").onclick = function () {
location.href = "url";
};
</script>
</li>
<li>
<input type="button" name="area" id="bedroom1" value="Bedroom 1" ><br><br>
<script type="text/javascript">
sessionStorage.setItem("bedroom1","false");
document.getElementById("bedroom1").onclick = function () {
location.href = "url";
};
</script>
</li>
</form>
</ul>
厨房
function checkTasks(form){
var count = 0;
for(var i=0;i<form.task.length;i++){
if(form.task[i].checked){
count++;
}
}
if(count == form.task.length){
sessionStorage.setItem("kitchen","true");
window.open("url");
}else{
alert("You have not completed all the tasks! Please check all the boxes to indicate you have completed the tasks. If there is an issue, write it in the other box.");
}
}
厨房 HTML
<body>
<header align=center>Kitchen To Do List</header>
<form name="todolist" >
<div id="button">
<label>
<input type="checkbox" name="task" value="1" ><p>Microwave</p>
</label>
</div>
<div id="button">
<label>
<input type="checkbox" name="task" value="1"><p>Coffee Maker</p>
</label>
</div>
<div id="button">
<label>
<input type="checkbox" name="task" value="1"><p>Oven</p>
</label>
</div>
<div id="button">
<label>
<input type="checkbox" name="task" value="1"><p>Dishwasher</p>
</label>
</div>
<div id="button">
<label>
<input type="checkbox" name="task" value="1"><p>Stove Top</p>
</label>
</div>
<div id="button">
<label>
<input type="checkbox" name="task" value="1"><p>Other</p>
</label>
</div>
<textarea id="other"></textarea><br><br>
<p align=center>
<input type="submit" name="box" id="box" value="Complete" onclick="checkTasks(this.form)">
</p>
</form>
<div class="close">
<form align=center action="url" target="_self">
<input type="submit" name="back" value="Back">
</form>
</div>
最佳答案
每次加载主页时，您都会使用这些内联脚本将值设置为 false。删除 home.html 中的 sessionStorage.setItem("livingroom","false"); 调用，看起来一切都会正常。
关于javascript - 无法获取根据下一页中的信息更改颜色的按钮，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/56344358/