Last active
August 29, 2015 14:13
-
-
Save vitosamson/78bef2c2106674a39bf2 to your computer and use it in GitHub Desktop.
Object.defineProperty data-binding
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <head> | |
| <script src="main.js"></script> | |
| </head> | |
| <body> | |
| <div> | |
| {{ foo }} | |
| </div> | |
| <input type="text" data-model="foo" id="foo"> | |
| </body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 'use strict'; | |
| var $scope = {}, | |
| models = {}; | |
| document.addEventListener('DOMContentLoaded', function(evt) { | |
| var children = document.body.childNodes; | |
| for (var child in children) { | |
| var model; | |
| child = children[child]; | |
| if (child.nodeType === 1) { | |
| // input element, setup change listeners | |
| if (child.localName === 'input') { | |
| if (child.dataset) { | |
| if (child.dataset.model) { | |
| var el = child; | |
| model = child.dataset.model; | |
| el.onchange = function() { | |
| $scope[model] = el.value; | |
| }; | |
| el.onkeypress = el.onchange; | |
| el.onpase = el.onchange; | |
| el.oninput = el.onchange; | |
| } | |
| } | |
| } | |
| // any other element with a {{ model }} binding | |
| else { | |
| var text = child.innerHTML, | |
| r = /{{.*}}/; | |
| if (r.test(text)) { | |
| var m = text.match(/[a-zA-Z]+/); | |
| models[m] = models[m] || []; | |
| models[m].push(child); | |
| child.innerHTML = ''; | |
| } | |
| } | |
| Object.defineProperty($scope, model, { | |
| set: function(value) { | |
| var selectionStart, | |
| selectionEnd; | |
| if (el.selectionStart) { | |
| selectionStart = el.selectionStart; | |
| selectionEnd = el.selectionEnd; | |
| } | |
| el.value = value; | |
| if (models[model]) { | |
| models[model].forEach(function(m) { | |
| m.innerHTML = value; | |
| }); | |
| } | |
| if (el.setSelectionRange) | |
| el.setSelectionRange(selectionStart, selectionEnd); | |
| } | |
| }); | |
| } | |
| } | |
| $scope.foo = 'foo'; | |
| }); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment