Initial commit

.gitignore

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+.DS_Store
+
+node_modules/
+npm-debug.log

LICENSE

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+Copyright (C) 2014 Kevin Ingersoll
+
+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.

README.md

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+# Viewport plugin for [Vue](http://vuejs.org/)
+
+This [Vue plugin](http://vuejs.org/guide/plugin.html) adds a `detect-viewport` directive, allowing you to detect viewport enter and leave events in your VM.
+
+## Usage
+
+Follow the [official Vue plugin](http://vuejs.org/guide/plugin.html) documentation for installation instructions.
+
+Once the plugin is added to your project, you can add a `v-detect-viewport` attribute to any VM element and then listen to `viewportenter` and `viewportleave` events.
+
+```html
+<div v-component="my-component" v-detect-viewport>
+	<p>Am I in the viewport?</p>
+</div>
+```
+
+```js
+Vue.component('my-component', {
+	created: function () {
+		this.$on('viewportenter', function () {
+			console.log('I have entered the viewport.')
+		})
+		this.$on('viewportleave', function () {
+			console.log('I have left the viewport.')
+		})
+	}
+})
+```

dist/vue-viewport.js

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+(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+function isElementInViewport (el) {
+	var rect = el.getBoundingClientRect()
+	return rect.bottom > 0
+		&& rect.right > 0
+		&& rect.top < (window.innerHeight || document.documentElement.clientHeight)
+		&& rect.left < (window.innerWidth || document.documentElement.clientWidth)
+}
+
+
+var directives = []
+
+function notify (directive) {
+	if (!directive.el) return
+
+	var inViewport = isElementInViewport(directive.el)
+	if (directive.inViewport == null || directive.inViewport !== inViewport) {
+		directive.inViewport = inViewport
+		var direction = inViewport ? 'enter' : 'leave'
+		directive.vm.$emit('viewport' + direction, directive.el)
+	}
+}
+
+function notifyAll () {
+	directives.forEach(notify)
+}
+
+
+['DOMContentLoaded', 'load', 'scroll', 'resize', 'popstate'].forEach(function (event) {
+	window.addEventListener(event, notifyAll, false)
+})
+
+
+module.exports = {
+	isEmpty: true,
+
+	bind: function () {
+		this.vm.$on('hook:attached', notifyAll)
+		this.vm.$on('hook:detached', notifyAll)
+
+		if (directives.indexOf(this) === -1) {
+			directives.push(this)
+		}
+	},
+
+	unbind: function () {
+		this.vm.$off('hook:attached', notifyAll)
+		this.vm.$off('hook:detached', notifyAll)
+
+		var index = directives.indexOf(this)
+		if (index > -1) {
+			directives.splice(index, 1)
+		}
+	}
+}
+
+},{}],2:[function(require,module,exports){
+exports.install = function (Vue, options) {
+	Vue.directive('detect-viewport', require('./directives/detect-viewport'))
+}
+
+},{"./directives/detect-viewport":1}]},{},[2])

gulpfile.js

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+var gulp = require('gulp')
+var browserify = require('browserify')
+var source = require('vinyl-source-stream')
+var uglify = require('gulp-uglify')
+var rename = require('gulp-rename')
+
+gulp.task('build:js', function () {
+	return browserify('./src/index.js')
+		.external(['vue'])
+		.bundle()
+		.pipe(source('vue-viewport.js'))
+		.pipe(gulp.dest('dist'))
+})
+
+gulp.task('build', ['build:js'], function () {
+	return gulp.src(['dist/**/*.js', '!**/*.min.js'])
+		.pipe(uglify())
+		.pipe(rename({ suffix: '.min' }))
+		.pipe(gulp.dest('dist'))
+})
+
+gulp.task('default', ['build'])

package.json

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+{
+  "name": "vue-viewport",
+  "version": "0.0.1",
+  "description": "Vue plugin for detecting when elements enter and leave the viewport",
+  "keywords": [
+    "vue",
+    "viewport"
+  ],
+  "main": "src/index.js",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/holic/vue-viewport.git"
+  },
+  "bugs": "https://github.com/holic/vue-viewport/issues",
+  "homepage": "https://github.com/holic/vue-viewport",
+  "author": {
+    "name": "Kevin Ingersoll",
+    "email": "kingersoll@gmail.com",
+    "url": "http://keviningersoll.com/"
+  },
+  "license": "MIT",
+  "devDependencies": {
+    "vue": "~0.10.5",
+    "gulp": "~3.8.2",
+    "vinyl-source-stream": "~0.1.1",
+    "browserify": "~4.1.11",
+    "gulp-rename": "~1.2.0",
+    "gulp-uglify": "~0.3.1"
+  }
+}

src/directives/detect-viewport.js

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+function isElementInViewport (el) {
+	var rect = el.getBoundingClientRect()
+	return rect.bottom > 0
+		&& rect.right > 0
+		&& rect.top < (window.innerHeight || document.documentElement.clientHeight)
+		&& rect.left < (window.innerWidth || document.documentElement.clientWidth)
+}
+
+
+var directives = []
+
+function notify (directive) {
+	if (!directive.el) return
+
+	var inViewport = isElementInViewport(directive.el)
+	if (directive.inViewport == null || directive.inViewport !== inViewport) {
+		directive.inViewport = inViewport
+		var direction = inViewport ? 'enter' : 'leave'
+		directive.vm.$emit('viewport' + direction, directive.el)
+	}
+}
+
+function notifyAll () {
+	directives.forEach(notify)
+}
+
+
+['DOMContentLoaded', 'load', 'scroll', 'resize', 'popstate'].forEach(function (event) {
+	window.addEventListener(event, notifyAll, false)
+})
+
+
+module.exports = {
+	isEmpty: true,
+
+	bind: function () {
+		this.vm.$on('hook:attached', notifyAll)
+		this.vm.$on('hook:detached', notifyAll)
+
+		if (directives.indexOf(this) === -1) {
+			directives.push(this)
+		}
+	},
+
+	unbind: function () {
+		this.vm.$off('hook:attached', notifyAll)
+		this.vm.$off('hook:detached', notifyAll)
+
+		var index = directives.indexOf(this)
+		if (index > -1) {
+			directives.splice(index, 1)
+		}
+	}
+}

src/index.js

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+exports.install = function (Vue, options) {
+	Vue.directive('detect-viewport', require('./directives/detect-viewport'))
+}