本人最近在学习Vue，从网上查询了很多关于Vue监听数据变化原理，稍微整理精简一下做下分享。
浅度监听
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>浅度监听</title> <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> <meta content="yes"> <meta content="black"> <script src="https://www.jb51.net/js/vue1.0.js"></script> <script src="https://www.jb51.net/js/vue-resource.js"></script> <script> window.onload = function(){ var vm = new Vue({ el:'#box', data:{ a:111, b:2 } }); vm.$watch('a',function(){ alert('发生变化了'); }); document.onclick = function(){ vm.a = 1; } } </script> </head> <body> <div> {{a}} <hr> {{b}} </div> </body> </html>
深度监听
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>深度监听</title> <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> <meta content="yes"> <meta content="black"> <script src="https://www.jb51.net/js/vue1.0.js"></script> <script src="https://www.jb51.net/js/vue-resource.js"></script> <script> window.onload = function(){ var vm = new Vue({ el:'#box', data:{ json:{name:'abcdef',age:'16'}, b:2 } }); vm.$watch('json',function(){ alert('发生变化了'); },{deep:true}); document.onclick = function(){ vm.json.name = "aaaaaa"; } } </script> </head> <body> <div> {{json | json}} <hr> {{b}} </div> </body> </html>