Promise

Promise.reject 失败的回调

https://blog.csdn.net/qq_37939251/article/details/93650542

  1. function getStr1() {
  3.     return new Promise(function (resolve, reject) {
  5.         setTimeout(function () {
  7.             resolve('我');
  9.         }, 1000);
  11.     });
  13. }
  15. function getStr2() {
  17.     return new Promise(function (resolve, reject) {
  19.         setTimeout(function () {
  21.             resolve('爱');
  23.         }, 1000);
  25.     });
  27. }
  29. function getStr3() {
  31.     return new Promise(function (resolve, reject) {
  33.         setTimeout(function () {
  35.             resolve('米');
  37.         }, 1000);
  39.     });
  41. }
  43. function getStr4() {
  45.     return new Promise(function (resolve, reject) {
  47.         setTimeout(function () {
  49.             resolve('饭');
  51.         }, 1000);
  53.     });
  55. }
  57. getStr1().then(function (data) {
  59.     console.log(data);
  61.     return getStr2();
  63. }).then(function (data) {
  65.     console.log(data);
  67.     return getStr3();
  69. }).then(function (data) {
  71.     console.log(data);
  73.     return getStr4();
  75. }).then(function (data) {
  77.     console.log(data);
  79. })

prototype

Vue.prototype.$appName = ‘My App’

https://cn.vuejs.org/v2/cookbook/adding-instance-properties.html

main.js

  1. Vue.prototype.msgSuccess = function(msg) {
  2.     this.$message({
  3.         showClose: true,
  4.         message: msg,
  5.         type: "success"
  6.     });
  7. }

demo.vue

  1. this.msgSuccess("删除成功");