Created
August 1, 2018 22:46
Revisions
-
jsobell revised this gist
Aug 1, 2018 . No changes.There are no files selected for viewing
-
jsobell created this gist
Aug 1, 2018 .There are no files selected for viewing
This file contains hidden or 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 charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,7 @@ <template> <ul href="#!" repeat.for="user of users"> <li> <input value.bind='user.firstName' /> <input value.bind='user.lastName' /> </li> </ul> </template> This file contains hidden or 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 charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,67 @@ export class App { users = [ { id: 1, firstName: 'Rob', lastName: 'Eisenberg' }, { id: 2, firstName: 'Jeremy', lastName: 'Danyow' }, { id: 3, firstName: 'Matt', lastName: 'Broadst' }]; selectUser(userId) { let user = this.users.find(u => u.id == userId); user.state = 'active'; } activate() { var cd = new ChangeDetector(); cd.observe(this, 'users', (to,from,property)=>console.log({ to,from,property })); } } export class ChangeDetector { constructor() { } observe(target, property, callback, checkspersecond) { var subscription = { timer:{}, target, property, previous:{} }; subscription.timer = setInterval(() => this.compare(subscription, callback) , 1000/(checkspersecond || 7)); return () => { clearInterval(subscription.timer); } } compare(subscription:any, callback) { let s=subscription.target[subscription.property]; let path = 'this'; var diffs = this.finddiff(s, subscription.previous,0,path); if (diffs[0]) { callback(diffs[2], diffs[1], diffs[0] ); } subscription.previous = JSON.parse(JSON.stringify(s)) ; } finddiff = function(previous,current, depth, path){ let isarray = (current instanceof Array); for (var p in current) { if(typeof(current[p]) !== typeof(previous[p])) return [path+'.'+p,current[p] , previous[p]]; if((current[p]===null) !== (previous[p]===null)) return [path+'.'+p,current[p],previous[p]]; switch (typeof(current[p])) { case 'undefined': if (typeof(previous[p]) != 'undefined') return [path+'.'+p,undefined,previous[p]]; break; case 'object': if(current[p]!==null && previous[p]!==null && (current[p].constructor.toString() !== previous[p].constructor.toString())) return [path+'.'+p, current[p], previous[p]]; let nested = this.finddiff(previous[p],current[p], depth+1, path + (isarray ? '[' : '.') + p + (isarray ? ']' : '')); if(!!nested.length) return nested; break; case 'function': if (p != 'equals' && current[p].toString() != previous[p].toString()) return [path+'.'+p, current[p],previous[p]]; break; default: if (current[p] !== previous[p]) return [path+'.'+p, current[p], previous[p]]; } } return []; } } This file contains hidden or 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 charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,17 @@ <!doctype html> <html> <head> <title>Aurelia</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="styles.css"> </head> <body aurelia-app> <h1>Loading...</h1> <script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/jspm_packages/system.js"></script> <script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/config.js"></script> <script> System.import('aurelia-bootstrapper'); </script> </body> </html> This file contains hidden or 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 charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,18 @@ a { display: block; } a:link { color: black; text-decoration: none; } .collection-item { background: lightgray; } /* since you set background property on .collection-item, this style must come after .collection-item otherwise it's not applied */ .active { background: blue; }