springuper/microbinding

## microbinding

<!DOCTYPE html>
<html>
<head>
<script src="http://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script>
    <meta charset="utf-8">
    <title>JS Bin</title>
</head>
<body>
<div data-component="input">
    <template>
        <input type="text" name="username" tb-model="username" value="" />
        <span>{{ username }}</span>
    </template>
</div>
<script>
var DIRECTIVE_ATTR_MODEL = 'tb-model',
    regMustache = /\{\{\s*(\w+)\s*\}\}/g,
    slice = Array.prototype.slice;

function boot() {
    var components = slice.call(document.querySelectorAll('[data-component]'), 0);
    components.forEach(function (el) {
        var component = el.getAttribute('data-component');
        bootComponent(el, window[component + 'Controller']);
    });
}

function bootComponent(el, controller) {
    var $scope = {},
        elFrag = el.querySelector('template').content.cloneNode(true);
    traverse(elFrag, $scope);
    el.appendChild(elFrag);
    controller($scope);
}

function traverse(root, $scope) {
    for (var el = root.firstChild; el; el = el.nextSibling) {
        parseElement(el, $scope);
        if (el) {
            traverse(el, $scope);
        }
    }
}

function parseElement(el, $scope) {
    if (el.nodeType === 1) {
        // element
        if (el.hasAttribute(DIRECTIVE_ATTR_MODEL)) {
            var model = el.getAttribute(DIRECTIVE_ATTR_MODEL);
            el.removeAttribute(DIRECTIVE_ATTR_MODEL);
            el.addEventListener('input', function () {
                $scope[model] = this.value;
            });
        }
    } else if (el.nodeType === 3) {
        // text node
        var text = el.textContent,
            tpl = [],
            lastIndex = 0,
            match = regMustache.exec(text);
        while (match) {
            tpl.push(text.substring(lastIndex, regMustache.lastIndex - match[0].length));
            tpl.push({
                type: 'var',
                content: match[1]
            });
            lastIndex = regMustache.lastIndex;
            match = regMustache.exec(text);
        }
        watch($scope, function () {
            text = '';
            tpl.forEach(function (item) {
                text += typeof item === 'string' ? item : $scope[item.content];
            });
            el.textContent = text;
        });
    }
}

function watch($scope, cb) {
    var old = _.cloneDeep($scope),
        timer;
    timer = setInterval(function () {
        if (!_.isEqual($scope, old)) {
            cb($scope, old);
            old = _.cloneDeep($scope);
        }
    }, 50);
}

function inputController($scope) {
    $scope.username = 'spring';
}

boot();
</script>
</body>
</html>

	<!DOCTYPE html>
	<html>
	<head>
	<script src="http://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script>
	<meta charset="utf-8">
	<title>JS Bin</title>
	</head>
	<body>
	<div data-component="input">
	<template>
	<input type="text" name="username" tb-model="username" value="" />
	<span>{{ username }}</span>
	</template>
	</div>
	<script>
	var DIRECTIVE_ATTR_MODEL = 'tb-model',
	regMustache = /\{\{\s(\w+)\s\}\}/g,
	slice = Array.prototype.slice;

	function boot() {
	var components = slice.call(document.querySelectorAll('[data-component]'), 0);
	components.forEach(function (el) {
	var component = el.getAttribute('data-component');
	bootComponent(el, window[component + 'Controller']);
	});
	}

	function bootComponent(el, controller) {
	var $scope = {},
	elFrag = el.querySelector('template').content.cloneNode(true);
	traverse(elFrag, $scope);
	el.appendChild(elFrag);
	controller($scope);
	}

	function traverse(root, $scope) {
	for (var el = root.firstChild; el; el = el.nextSibling) {
	parseElement(el, $scope);
	if (el) {
	traverse(el, $scope);
	}
	}
	}

	function parseElement(el, $scope) {
	if (el.nodeType === 1) {
	// element
	if (el.hasAttribute(DIRECTIVE_ATTR_MODEL)) {
	var model = el.getAttribute(DIRECTIVE_ATTR_MODEL);
	el.removeAttribute(DIRECTIVE_ATTR_MODEL);
	el.addEventListener('input', function () {
	$scope[model] = this.value;
	});
	}
	} else if (el.nodeType === 3) {
	// text node
	var text = el.textContent,
	tpl = [],
	lastIndex = 0,
	match = regMustache.exec(text);
	while (match) {
	tpl.push(text.substring(lastIndex, regMustache.lastIndex - match[0].length));
	tpl.push({
	type: 'var',
	content: match[1]
	});
	lastIndex = regMustache.lastIndex;
	match = regMustache.exec(text);
	}
	watch($scope, function () {
	text = '';
	tpl.forEach(function (item) {
	text += typeof item === 'string' ? item : $scope[item.content];
	});
	el.textContent = text;
	});
	}
	}

	function watch($scope, cb) {
	var old = _.cloneDeep($scope),
	timer;
	timer = setInterval(function () {
	if (!_.isEqual($scope, old)) {
	cb($scope, old);
	old = _.cloneDeep($scope);
	}
	}, 50);
	}

	function inputController($scope) {
	$scope.username = 'spring';
	}

	boot();
	</script>
	</body>
	</html>