implemented `onConfig` to by pass the request if certain conditions are matched

[cyfung1031]

close #118

Remarks

Since most requests are async, it might not be suitable to do the bypassing in onRequest. onConfig is synchronously triggered in xhr.open, so it can completely bypass the entire open+setRequestHeader(POST request)+send.

Usage

const { unProxy, originXhr } = proxy({
    onConfig: (config, xhrProxy) => {
        console.log(`url: ${config.url}`)
        if (config.url.indexOf('google.com') >= 0) return false;
    },
    onRequest: (config, handler) => {
        handler.next(config);
    },
    onError: (err, handler) => {
        handler.next(err)
    },
    onResponse: (response, handler) => {
        handler.next(response)
    }
})

[cyfung1031]

Combined Distribution Script ajaxhook.js for Testing (PR 119, 120, 121, 122) https://cdn.jsdelivr.net/gh/cyfung1031/ajax-hook@1ebe48e08108449669290a226e52fc6fbf7ec9ef/dist/ajaxhook.js

[DAHUIAAAAA]

新增 api 需要完善一下 markdown 文档

[cyfung1031]

新增 api 需要完善一下 markdown 文档

新增了