作者zeSil (Ryhpezlis)
看板Web_Design
标题Re: [问题] 如何撰写操作 IndexedDB 的测试程式码
时间Mon May 7 22:13:05 2018
※ 引述《art1 (人，原来不是人)》之铭言：
43
: function openDB (name, version) {
: let request = indexedDB.open(name, version);
: request.onerror = (event) => {
: console.log('error');
: };
: request.onsuccess = (event) => {
: console.log('success');
: };
: request.onupgradeneeded = (event) => {
: console.log('upgrade');
: };
: }
通常遇到这种 evet driven 以及非同步的，
我会把它全部包成 promise 处理，避免遇到你说的 callback 问题
function openDB(name, version) {
return new Promise((resolve, reject) => {
let request = indexedDB.open(name, version);
request.onerror = event => {
reject(do_something_stuff);
};
request.onsuccess = event => {
resolve(do_something_stuff);
};
request.onupgradeneeded = event => {
// do_something_stuff
};
});
}
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1F：推 art1: 感谢指导 05/07 22:23