Alt- Text for Graphs

**[Original report](https://bitbucket.org/laborstudents/cas-flask/issue/254) by Sarah Watts (Bitbucket: [sarahawatts](https://bitbucket.org/sarahawatts), GitHub: [SarahAWatts1](https://github.com/SarahAWatts1)).**

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Alt text needs to be created for the home screen on CAS. If the description of the graph is larger than 250 characters than the alt attribute in HTML cannot be used. Because the graph falls under a complex image you will most likely have to provide alt text somewhere else other than the alt attribute.

Below is a link that will help (The graph falls under "Complex Images" so look for that header):

https://webaim.org/techniques/alttext/

Start at the CAS home screen and locate the graph markup or rendering entry point; no source file or test is named in the issue. Review the linked WebAIM guidance for complex images, then verify that the graph has an accessible description outside the HTML alt attribute when needed.

Written by the indexing model from the issue text.