New Solution for CasperJS Navigation Step Flow Control; infinite loop, break, continue, ... by label() and goto()

[Hiro Yotsumoto]

Hello, CasperJS community.

I am using CasperJS for some my projects. Thank you very much, Nicolas.

By the way, sometimes, I would like to describe the logic, 

like infinite loop and conditional break. 

For example:

  while(true) {

    DO SOMETHING

    if( CHECK CONDITION ) { break; }

    DO SOMETHING

  }

However, I can not find out the solution in current CasperJS.

So, I tried to solve this problem by my own way.

The project result is on my GitHub repository

https://github.com/yotsumoto/casperjs-goto

I realized CasperJS Navigation Step Flow Control 

by adding new label() and goto() functions.

This repository has useful sample scripts too.

Please feel free to try them.

Thank you.

Hiro Yotsumoto

[Nicolas Perriault]

On Thu, Aug 23, 2012 at 4:33 PM, Hiro Yotsumoto <yots...@skymerica.com> wrote:

> The project result is on my GitHub repository
> https://github.com/yotsumoto/casperjs-goto

Looks like an amazing piece of work, and definitely useful cheers!

I'll have a look at the code for sure :)

++

--
Nicolas Perriault
https://nicolas.perriault.net/ — http://www.akei.com/
Skype: nperriault
Phone: +33 (0) 660 92 08 67

[Hiro Yotsumoto]

Hi, Nicolas

Thank you for your response and it is my huge pleasure.

I think that then() and checkStep() are very fundamental components of CasperJS.

If you prefer to implement this solution, I'll leave it up to you.

I hope this solution will be implemented to the CasperJS trunk module 

and everyone can get benefit.

Thank you.

Hiro Yotsumoto

 

[Jingchao Hu]

This is soooooooo awesome work

I have the exactly same problem and having googling a whole day trying to find a solution

thank you for sharing your hack

[fard...@gmail.com]

Thanks, I've found this quite useful.

As somebody pointed out here, this patch might cause problems with using waitForSelector(), or in my case waitFor(): the "then()" function never gets called. As suggested, a quick workaround is to move the code from the then() function to another block following waitFor().