Published on: 31 March, 2016

How to check if a function in windows parent exists in Javascript

Posted by andy | 721 views 0 likes 0 favourites 0 comments
Tumblr Digg Google Plus

When ever you try to reference a function from parent window, always perform a check if the function itself is exist. This will ensure there is no javascript error that can cause problem loading your site content or may cause a conflict with another javascript code.

To check if a function exists in the windows parent, you can use the following code.

if (typeof parent.functionName === "function") {
	//if exists perform your code here.
}
Comments

There are no comments available.

Write Comment
0 characters entered. Maximum characters allowed are 1000 characters.
Related Articles
Published on: 20 June, 2016
Google Analytics is one of the best free analytics site tracker. It gives you an idea the statistic of your visitors like the country they come from, the URL or keyword they search to go to your site or even the demographic or ages of your visitors. If you are a developer, you definitely do not want to track any data when you are in development phase. In this tutorial, you will learn how to disable google analytics for local development by using a javascript code if condition.
Published on: 13 May, 2016
To convert a number value into money format in Javascript can be done easily using Javascript. Firstly you will need to use the built in toFixed function that will return a number value into two decimal point and then using a regular expression to reformat the value.
Published on: 16 March, 2016
If you try to search this particular topic in Google Search, you will come up with a list of different solutions. Most of them will use the document or body height to compare if there is a difference, we assume there will be a scroll bar. Unfortunately it doesn't work well, most of them it will return the same height.
Related Tutorials