Send undefined if the next element doesn't exist

harshithmullapudi · web-flow · commit 593e8b9c3b30 · 2020-01-29T12:55:38.000+05:30
diff --git a/intro.js b/intro.js
@@ -422,7 +422,7 @@
     var continueStep = true;
 
     if (typeof (this._introBeforeChangeCallback) !== 'undefined') {
-      continueStep = this._introBeforeChangeCallback.call(this, nextStep.element);
+      continueStep = this._introBeforeChangeCallback.call(this, nextStep && nextStep.element);
     }
 
     // if `onbeforechange` returned `false`, stop displaying the element
@@ -463,7 +463,7 @@
     var continueStep = true;
 
     if (typeof (this._introBeforeChangeCallback) !== 'undefined') {
-      continueStep = this._introBeforeChangeCallback.call(this, nextStep.element);
+      continueStep = this._introBeforeChangeCallback.call(this, nextStep && nextStep.element);
     }
 
     // if `onbeforechange` returned `false`, stop displaying the element

Original file line number	Diff line number	Diff line change
`@@ -422,7 +422,7 @@`
`422`	`422`	`var continueStep = true;`
`423`	`423`
`424`	`424`	`if (typeof (this._introBeforeChangeCallback) !== 'undefined') {`
`425`		`- continueStep = this._introBeforeChangeCallback.call(this, nextStep.element);`
	`425`	`+ continueStep = this._introBeforeChangeCallback.call(this, nextStep && nextStep.element);`
`426`	`426`	`}`
`427`	`427`
`428`	`428`	// if `onbeforechange` returned `false`, stop displaying the element
`@@ -463,7 +463,7 @@`
`463`	`463`	`var continueStep = true;`
`464`	`464`
`465`	`465`	`if (typeof (this._introBeforeChangeCallback) !== 'undefined') {`
`466`		`- continueStep = this._introBeforeChangeCallback.call(this, nextStep.element);`
	`466`	`+ continueStep = this._introBeforeChangeCallback.call(this, nextStep && nextStep.element);`
`467`	`467`	`}`
`468`	`468`
`469`	`469`	// if `onbeforechange` returned `false`, stop displaying the element