我正在尝试为单页应用程序中的返回按钮构建一个简单的JavaScript仅限HTML5实现。
作为第一步,我有一个有效的骨骼原型,但是只有一次 - 当我走1> 2> 3,然后从3开始,然后再回到2个,但无论如何都将其固定在2我按下后面按钮多次。行为始终是相同的,并且在浏览器之间,所以我确信它一定是我的逻辑,但是即使经过许多尝试,我也无法弄清楚什么是损坏的。此外,向前按钮似乎也被停用了。
简短地解释它,我有三个(隐藏(divs,每个divs都有一个(可见的("描述",单击打开实际div的单击。当页面加载时,只有描述是可见的,而没有内容。当用户单击任何一个div的描述时,该div显示,其余的是/仍然隐藏。
该网站是Nginx服务器的后面,该服务器将所有内容都传递到主页,并带有诸如:
的指令。location /div1{
proxy_pass https://192.168.43.220:8765/;
}
由于它相对简单,并且可以直接复制粘贴以复制,所以我正在在这里粘贴所有内容的自由。已经有反变量和许多控制台。logs,因此应该使试图修复它的人更容易。
我也很感激任何解释为什么这不起作用。
<html>
<head>
</head>
<body>
<b href="#div1" onclick=show_div1()>DIV1</b>
<b href="#div2" onclick=show_div2()>DIV2</b>
<b href="#div3" onclick=show_div3()>DIV3</b>
<div id="div1">
<p>This is div number 1</p>
</div>
<div id="div2">
<p>This is div number 2</p>
</div>
<div id="div3">
<p>This is div number 3</p>
</div>
</body>
<script>
document.addEventListener("DOMContentLoaded", function(event){
on_page_load();
});
function on_page_load(){
document.getElementById("div1").style.display="none";
document.getElementById("div2").style.display="none";
document.getElementById("div3").style.display="none";
var p = window.location.pathname.split("/")[1];
console.log("on page load, pathname: " + p);
history.pushState({url: p}, null, p);
console.log("js routing to: " + p);
js_route(p);
n1 = 0; n2 = 0; n3 = 0;
}
function show_div1(){
document.getElementById("div1").style.display="block";
document.getElementById("div2").style.display="none";
document.getElementById("div3").style.display="none";
n1 = n1 + 1;
console.log("showing div1 for " + n1 + "th time");
history.pushState({url: 'div1', n: n1}, null, "div1");
}
function show_div2(){
document.getElementById("div2").style.display="block";
document.getElementById("div1").style.display="none";
document.getElementById("div3").style.display="none";
n2 = n2 + 1;
console.log("showing div2 for " + n2 + "th time");
history.pushState({url: 'div2', n: n2}, null, "div2");
}
function show_div3(){
document.getElementById("div3").style.display="block";
document.getElementById("div2").style.display="none";
document.getElementById("div1").style.display="none";
n3 = n3 + 1;
console.log("showing div3 for " + n3 + "th time");
history.pushState({url: 'div3', n: n3}, null, "div3");
}
window.onpopstate = function(event) {
var popped_url = event.state.url;
var popped_n = event.state.n;
console.log("popstate url: " + popped_url);
console.log("onpopstate, routing to: " + window.location.pathname + " and n is " + popped_n);
js_route(popped_url);
//js_route(window.location.pathname.split("/")[1]);
}
function js_route(path){
switch(path){
case "div1":
show_div1();
break;
case "div2":
show_div2();
break;
case "div3":
show_div3();
}
}
</script>
好吧,经过更多的调试和沉思,我弄清楚了什么破裂。
show_div
的功能全部将状态推入历史记录。因此,当popstate
事件处理程序调用js_route
函数时,它调用正确的历史记录,然后将相同的状态推回历史记录。因此,当从1> 2> 3开始时,然后从3回到2,但也将2再次推向历史 - 因此,再次回去将弹出现在的历史上最新状态。因此创建一个无限在任何其他流行病事件上循环。
解决此问题的方法是创建一组新的函数-show_div_hist
,它与show_div
函数相同,但不要将任何内容推入历史记录。同样,一个新路由器js_route_history
,它与js_route
函数相同,但可以调用上述show_div_hist
函数。
就是这样。效果很好。
<html>
<head>
</head>
<body>
<b href="#div1" onclick=show_div1()>DIV1</b>
<b href="#div2" onclick=show_div2()>DIV2</b>
<b href="#div3" onclick=show_div3()>DIV3</b>
<div id="div1">
<p>This is div number 1</p>
</div>
<div id="div2">
<p>This is div number 2</p>
</div>
<div id="div3">
<p>This is div number 3</p>
</div>
</body>
<script>
document.addEventListener("DOMContentLoaded", function(event){
on_page_load();
});
function on_page_load(){
document.getElementById("div1").style.display="none";
document.getElementById("div2").style.display="none";
document.getElementById("div3").style.display="none";
document.getElementById("div4").style.display="none";
var p = window.location.pathname.split("/")[1];
console.log("on page load, pathname: " + p);
history.pushState({url: p}, null, p);
console.log("js routing to: " + p);
js_route(p);
n1 = 0; n2 = 0; n3 = 0;
}
function show_div1(){
document.getElementById("div1").style.display="block";
document.getElementById("div2").style.display="none";
document.getElementById("div3").style.display="none";
document.getElementById("div4").style.display="none";
n1 = n1 + 1;
//console.log("showing div1 for " + n1 + "th time");
history.pushState({url: 'div1', n: n1}, null, "div1");
}
function show_div1_hist(){
document.getElementById("div1").style.display="block";
document.getElementById("div3").style.display="none";
document.getElementById("div2").style.display="none";
document.getElementById("div4").style.display="none";
// n1 = n1 + 1;
// console.log("showing div1 for " + n1 + "th time");
// history.pushState({url: 'div1', n: n1}, null, "div1");
}
function show_div2(){
document.getElementById("div2").style.display="block";
document.getElementById("div1").style.display="none";
document.getElementById("div3").style.display="none";
document.getElementById("div4").style.display="none";
n2 = n2 + 1;
//console.log("showing div2 for " + n2 + "th time");
history.pushState({url: 'div2', n: n2}, null, "div2");
}
function show_div2_hist(){
document.getElementById("div2").style.display="block";
document.getElementById("div1").style.display="none";
document.getElementById("div3").style.display="none";
document.getElementById("div4").style.display="none";
// n2 = n2 + 1;
// console.log("showing div2 for " + n2 + "th time");
// history.pushState({url: 'div2', n: n2}, null, "div2");
}
function show_div3(){
document.getElementById("div3").style.display="block";
document.getElementById("div2").style.display="none";
document.getElementById("div4").style.display="none";
document.getElementById("div1").style.display="none";
n3 = n3 + 1;
//console.log("showing div3 for " + n3 + "th time");
history.pushState({url: 'div3', n: n3}, null, "div3");
}
function show_div3_hist(){
document.getElementById("div3").style.display="block";
document.getElementById("div2").style.display="none";
document.getElementById("div1").style.display="none";
document.getElementById("div4").style.display="none";
// n3 = n3 + 1;
// console.log("showing div3 for " + n3 + "th time");
// history.pushState({url: 'div3', n: n3}, null, "div3");
}
window.onpopstate = function(event) {
event.preventDefault();
var popped_url = event.state.url;
var popped_n = event.state.n;
console.log("popstate url: " + popped_url);
console.log("onpopstate, routing to: " + window.location.pathname + " and n is " + popped_n);
js_route_hist(popped_url);
//js_route(window.location.pathname.split("/")[1]);
}
function js_route(path){
switch(path){
case "div1":
show_div1();
break;
case "div2":
show_div2();
break;
case "div3":
show_div3();
}
}
function js_route_hist(path){
switch(path){
case "div1":
show_div1_hist();
break;
case "div2":
show_div2_hist();
break;
case "div3":
show_div3_hist();
}
}
</script>
</html>