/
index.js
51 lines (43 loc) · 1.18 KB
/
index.js
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module.exports = function makeXhrFunction(inputOptions) {
var options = Object.assign({
method: 'GET',
success: defaultSuccess,
parse: defaultParse,
serialize: defaultSerialize,
headers: {},
}, inputOptions)
return function xhr(url, body) {
return new Promise(function promise(resolve, reject) {
var request = new XMLHttpRequest()
request.addEventListener('load', handleResult)
request.addEventListener('error', reject)
request.addEventListener('abort', reject)
request.open(options.method, url)
Object.keys(options.headers).forEach(function(key) {
request.setRequestHeader(key, options.headers[key])
})
if (typeof body === 'undefined') {
request.send()
} else {
request.send(options.serialize(body))
}
function handleResult() {
try {
var response = options.parse(request)
options.success(request) ? resolve(response) : reject(response)
} catch (e) {
reject(e)
}
}
})
}
}
function defaultSuccess(request) {
return request.status >= 200 && request.status < 400
}
function defaultSerialize(body) {
return JSON.stringify(body)
}
function defaultParse(request) {
return JSON.parse(request.responseText)
}