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Simple fetch vs. XHR example
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| fetch('weather.json') | |
| .then(function(response) { | |
| if (response.headers.get('content-type').includes('json')) { | |
| return response.json(); | |
| } else { | |
| throw new TypeError(); | |
| } | |
| }) | |
| .then(processJSON); |
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| var xhr = new XMLHttpRequest(); | |
| xhr.open('GET', 'weather.json'); | |
| xhr.responseType = 'json'; | |
| xhr.onload = function() { | |
| if (xhr.status == 200 | |
| && xhr.getResponseHeader('Content-Type').indexOf('json') !== -1) { | |
| processJSON(xhr.response); | |
| } else { | |
| throw new TypeError(); | |
| } | |
| } | |
| xhr.send(); |
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