[Pkg-javascript-commits] [node-stream-http] 162/208: Adding support for Service Workers.

[Bastien Roucariès]

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rouca pushed a commit to branch master
in repository node-stream-http.

commit 0a04a09f6843ab72f4d454a834519be9c6fa81d8
Author: Mikeal Rogers <mikeal.rogers at gmail.com>
Date:   Wed Nov 16 19:18:19 2016 -0800

    Adding support for Service Workers.
---
 lib/capability.js | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/lib/capability.js b/lib/capability.js
index 4801c8d..cc19253 100644
--- a/lib/capability.js
+++ b/lib/capability.js
@@ -6,12 +6,19 @@ try {
 	exports.blobConstructor = true
 } catch (e) {}
 
-var xhr = new global.XMLHttpRequest()
-// If XDomainRequest is available (ie only, where xhr might not work
-// cross domain), use the page location. Otherwise use example.com
-xhr.open('GET', global.XDomainRequest ? '/' : 'https://example.com')
+// Service workers don't have XHR
+if (global.XMLHttpRequest) {
+	var xhr = new global.XMLHttpRequest()
+	// If XDomainRequest is available (ie only, where xhr might not work
+	// cross domain), use the page location. Otherwise use example.com
+	xhr.open('GET', global.XDomainRequest ? '/' : 'https://example.com')
+} else {
+	var xhr = null
+}
+
 
 function checkTypeSupport (type) {
+	if (!xhr) return false
 	try {
 		xhr.responseType = type
 		return xhr.responseType === type
@@ -30,7 +37,7 @@ exports.arraybuffer = haveArrayBuffer && checkTypeSupport('arraybuffer')
 exports.msstream = !exports.fetch && haveSlice && checkTypeSupport('ms-stream')
 exports.mozchunkedarraybuffer = !exports.fetch && haveArrayBuffer &&
 	checkTypeSupport('moz-chunked-arraybuffer')
-exports.overrideMimeType = isFunction(xhr.overrideMimeType)
+exports.overrideMimeType = xhr ? isFunction(xhr.overrideMimeType) : false
 exports.vbArray = isFunction(global.VBArray)
 
 function isFunction (value) {

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