ajax index

001 ajax

1. 简单ajax
2. jsonp: get stock price

002 Promise Obj

1. setTimeout: async example
2. setTimeout 2: js引擎和GUI引擎互斥
3. Promise 详解: resolve, reject 是什么？
4. job1.then(job2).then(job3).catch(handleError);
5. Promise version ajax
6. Promise version ajax 2
7. Promise all: 多任务并行执行，都成功才进入then
8. Promise race: 多任务赛跑，有一个成功，则立刻进入then

003 drag and upload (backend: php)

1. drag demo
2. drag and upload demo
3. drag and upload demo 2
4. 003/03_multipy_drag.html 多文件拖拽到input file
5. 003/04_multipy_drag_preview.html 多文件拖拽到input file，并预览图片
6. 003/05_multipy_drag_preview_upload.html 多文件拖拽到input file，预览，上传

004 ajax using axios (backend: php)

1. ajax by axios get
2. ajax by axios post
3. axios.all 一起执行完，再打印
4. ajax post by axios config
5. ajax get picture 获取远端图片 太复杂了