fix: fix JSONP transport on IE9

darrachequesne · darrachequesne · commit bddd9928fcdb · 2021-05-11T08:22:36.000+02:00
This fixes the following error: > Unable to get value of the property 'readyState': object is null or undefined Which was introduced in c46611c
diff --git a/lib/transports/polling-jsonp.js b/lib/transports/polling-jsonp.js
@@ -181,7 +181,7 @@ class JSONPPolling extends Polling {
     } catch (e) {}
 
     if (this.iframe.attachEvent) {
-      this.iframe.onreadystatechange = function() {
+      this.iframe.onreadystatechange = () => {
         if (this.iframe.readyState === "complete") {
           complete();
         }

Original file line number	Diff line number	Diff line change
`@@ -181,7 +181,7 @@ class JSONPPolling extends Polling {`
`181`	`181`	`} catch (e) {}`
`182`	`182`
`183`	`183`	`if (this.iframe.attachEvent) {`
`184`		`- this.iframe.onreadystatechange = function() {`
	`184`	`+ this.iframe.onreadystatechange = () => {`
`185`	`185`	`if (this.iframe.readyState === "complete") {`
`186`	`186`	`complete();`
`187`	`187`	`}`