I keep seeing "Invalid Host/Origin Header" and "[WDS] Disconnected!" looping over and over in the Internet Explorer console when I run my Angular 7 application. What should I do?

Install this:

npm install webpack-dev-server --save-dev

Get rid of the funny border that appears around a button in Google Chrome upon a click with outline: none; in CSS.

That trick is the same as this trick.

more Apache Hadoop space, big data terminology

1. Apache Parquet is a data storage format with columns.
2. Apache Oozie (sounds like Uzi) is a job scheduler for Hadoop.
3. Apache Sqoop (sounds like scoop) is a command line tool for moving data between relational, SQL database and Hadoop. The name comes from SQL-to-Hadoop.
4. HDFS is the Hadoop Distributed File System sometimes just called Hadoop File System.

SPOF

single point of failure!

variables in CSS

There was a presentation on Angular Elements at my work today. It was alright. iFrames were suggested to be used some in clickjacking, etc. ...hence it would be best to include reusable stuff with Angular Elements instead of iFrames, etc. Anyhow, it was mentioned that while the CSS in Angular Elements is mostly sandboxed, a loophole in the sandboxing is CSS. These can be overpowered from the outside. So what are CSS variables? This has this example that would appear at the top of your stylesheet:

:root {
   --bgcolour: #ffffd0;
   --bqindents: 40px;
   --warningtextsize: 125%;
}

 
 

The example the link above has for using this stuff is:

table {
   background-color: var(--bgcolour);
}
blockquote {
   margin-left: var(--bqindents);
   margin-right: var(--bqindents);
}
p.warning {
   color: red;
   background-color: var(--bgcolour);
   font-size: var(--warningtextsize);
}

identity and access management a.k.a. IAM

SailPoint, the company, has an identity management system.

The FileTable of SQL Server is a way to store file blobs in a database.

That's very 1990s isn't it? You don't see that so much anymore do you? Mostly, people put files on a share somewhere and just keep a reference to the name of any one file in the database don't they? FileTable apparently has a way to make blobs in the database less painful. You may have at the "files" as if they were at a file share.