code-boxx/0-HTML-AJAX-BREADCRUMB.MD

## 0-HTML-AJAX-BREADCRUMB.MD

      
    Raw
  

              0-HTML-AJAX-BREADCRUMB.MD
            
          
    SIMPLE AJAX BREADCRUMB MENU

https://code-boxx.com/ajax-breadcrumb-menu/
LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## breadcrumb.css
/* (A) WRAPPER */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
}

/* (B) ITEMS */
.breadcrumb div {
  text-decoration: none;
  cursor: pointer;
}

/* (C) SEPERATOR */
.breadcrumb div::after { content: ">"; }
.breadcrumb div:last-child::after { content: ""; }

/* (D) COSMETICS - THEMES */
/* (D1) GENERAL */
.breadcrumb, .breadcrumb * {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
.breadcrumb {
  padding: 15px;
  border-radius: 10px;
}
.breadcrumb div { font-weight: 700; }
.breadcrumb div::after { padding: 0 10px; }

/* (D2) RED */
.breadcrumb.red { background: #ffe4e4 }
.breadcrumb.red div { color: #c53030; }
.breadcrumb.red div::after { color: #ffa9a9; }

/* (D3) GREEN */
.breadcrumb.green { background: #bbffdd }
.breadcrumb.green div { color: #219531; }
.breadcrumb.green div::after { color: #77e594; }

/* (D4) BLUE */
.breadcrumb.blue { background: #daf1ff }
.breadcrumb.blue div { color: #5067db; }
.breadcrumb.blue div::after { color: #a6c6e9; }

/* (D4) ORANGE */
.breadcrumb.orange { background: #ffebda }
.breadcrumb.orange div { color: #e18b2f; }
.breadcrumb.orange div::after { color: #ffbe96; }

/* (X) NOT IMPORTANT */
* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
#demoWrap {
  padding: 10px; margin-top: 20px;
  border: 1px solid #c7c7c7;
  background: #f2f2f2;
}

## breadcrumb.html
<!DOCTYPE html>
<html>
  <head>
    <title>AJAX Breadcrumb Menu Demo</title>

    <!-- (A) LOAD CSS + JS -->
    <link rel="stylesheet" href="breadcrumb.css">
    <script src="breadcrumb.js"></script>
  </head>
  <body>
    <!-- (B) WRAPPERS -->
    <nav id="demoMenu"></nav>
    <div id="demoWrap"></div>

    <!-- (C) ATTACH -->
    <script>
    // (C1) CREATE BREADCRUMB INSTANCE
    var bread = breadify({
      menu : document.getElementById("demoMenu"),
      wrap : document.getElementById("demoWrap")
    });

    // (C2) ADD BREADCRUMB(S)
    bread.add("Page A", "pageA.html");
    bread.add("Page B", "pageB.html");
    bread.go();
    </script>
  </body>
</html>

## breadcrumb.js
function breadify (instance) {
  // (A) PROPERTIES + SET CSS
  instance.loading = false; // currently loading
  instance.crumbs = []; // breadcrumbs
  instance.menu.className = "breadcrumb red"; // change the theme color if you want

  // (B) ADD A CRUMB
  instance.add = (name, url) => { if (!instance.loading) {
    let c = document.createElement("div"),
        i = instance.crumbs.length;
    c.innerHTML = name;
    c.onclick = () => instance.go(i);
    instance.crumbs.push({ c : c, u : url });
    instance.menu.appendChild(c);
  }};

  // (C) AJAX LOAD CRUMB
  instance.go = i => { if (!instance.loading) {
    // (C1) WHICH CRUMB TO LOAD?
    let len = instance.crumbs.length - 1;
    if (len<0 || i==len) { return; } // stop if error or user select last crumb
    if (isNaN(i)) { i = len; } // none - load last crumb
    if (i<0 || i>len) { i = len; } // prevent error - load last crumb

    // (C2) FETCH URL
    instance.loading = true; // "lock" until loaded
    fetch(instance.crumbs[i]["u"])
    .then(res => res.text())
    .then(txt => instance.wrap.innerHTML = txt)
    .catch(err => console.error(err))
    .finally(() => {
      for (j=i+1; j<=len; j++) { instance.crumbs[j]["c"].remove(); }
      instance.crumbs = instance.crumbs.slice(0, i+1);
      instance.loading = false; // unlock
    });
  }};

  // (D) DONE!
  return instance;
}

## pageA.html
<h1>PAGE A</h1>
<p>It works!</p>
<p onclick="bread.add('Page B', 'pageB.html'); bread.go();">
  Go To Page B
</p>

## pageB.html
<h1>PAGE B</h1>
<p>It works!</p>
	/* (A) WRAPPER */
	.breadcrumb {
	display: flex;
	flex-wrap: wrap;
	}

	/* (B) ITEMS */
	.breadcrumb div {
	text-decoration: none;
	cursor: pointer;
	}

	/* (C) SEPERATOR */
	.breadcrumb div::after { content: ">"; }
	.breadcrumb div:last-child::after { content: ""; }

	/* (D) COSMETICS - THEMES */
	/* (D1) GENERAL */
	.breadcrumb, .breadcrumb * {
	font-family: Arial, Helvetica, sans-serif;
	box-sizing: border-box;
	}
	.breadcrumb {
	padding: 15px;
	border-radius: 10px;
	}
	.breadcrumb div { font-weight: 700; }
	.breadcrumb div::after { padding: 0 10px; }

	/* (D2) RED */
	.breadcrumb.red { background: #ffe4e4 }
	.breadcrumb.red div { color: #c53030; }
	.breadcrumb.red div::after { color: #ffa9a9; }

	/* (D3) GREEN */
	.breadcrumb.green { background: #bbffdd }
	.breadcrumb.green div { color: #219531; }
	.breadcrumb.green div::after { color: #77e594; }

	/* (D4) BLUE */
	.breadcrumb.blue { background: #daf1ff }
	.breadcrumb.blue div { color: #5067db; }
	.breadcrumb.blue div::after { color: #a6c6e9; }

	/* (D4) ORANGE */
	.breadcrumb.orange { background: #ffebda }
	.breadcrumb.orange div { color: #e18b2f; }
	.breadcrumb.orange div::after { color: #ffbe96; }

	/* (X) NOT IMPORTANT */
	* {
	font-family: Arial, Helvetica, sans-serif;
	box-sizing: border-box;
	}
	#demoWrap {
	padding: 10px; margin-top: 20px;
	border: 1px solid #c7c7c7;
	background: #f2f2f2;
	}
	<!DOCTYPE html>
	<html>
	<head>
	<title>AJAX Breadcrumb Menu Demo</title>

	<!-- (A) LOAD CSS + JS -->
	<link rel="stylesheet" href="breadcrumb.css">
	<script src="breadcrumb.js"></script>
	</head>
	<body>
	<!-- (B) WRAPPERS -->
	<nav id="demoMenu"></nav>
	<div id="demoWrap"></div>

	<!-- (C) ATTACH -->
	<script>
	// (C1) CREATE BREADCRUMB INSTANCE
	var bread = breadify({
	menu : document.getElementById("demoMenu"),
	wrap : document.getElementById("demoWrap")
	});

	// (C2) ADD BREADCRUMB(S)
	bread.add("Page A", "pageA.html");
	bread.add("Page B", "pageB.html");
	bread.go();
	</script>
	</body>
	</html>
	function breadify (instance) {
	// (A) PROPERTIES + SET CSS
	instance.loading = false; // currently loading
	instance.crumbs = []; // breadcrumbs
	instance.menu.className = "breadcrumb red"; // change the theme color if you want

	// (B) ADD A CRUMB
	instance.add = (name, url) => { if (!instance.loading) {
	let c = document.createElement("div"),
	i = instance.crumbs.length;
	c.innerHTML = name;
	c.onclick = () => instance.go(i);
	instance.crumbs.push({ c : c, u : url });
	instance.menu.appendChild(c);
	}};

	// (C) AJAX LOAD CRUMB
	instance.go = i => { if (!instance.loading) {
	// (C1) WHICH CRUMB TO LOAD?
	let len = instance.crumbs.length - 1;
	if (len<0 \|\| i==len) { return; } // stop if error or user select last crumb
	if (isNaN(i)) { i = len; } // none - load last crumb
	if (i<0 \|\| i>len) { i = len; } // prevent error - load last crumb

	// (C2) FETCH URL
	instance.loading = true; // "lock" until loaded
	fetch(instance.crumbs[i]["u"])
	.then(res => res.text())
	.then(txt => instance.wrap.innerHTML = txt)
	.catch(err => console.error(err))
	.finally(() => {
	for (j=i+1; j<=len; j++) { instance.crumbs[j]["c"].remove(); }
	instance.crumbs = instance.crumbs.slice(0, i+1);
	instance.loading = false; // unlock
	});
	}};

	// (D) DONE!
	return instance;
	}
	<h1>PAGE A</h1>
	<p>It works!</p>
	<p onclick="bread.add('Page B', 'pageB.html'); bread.go();">
	Go To Page B
	</p>