This fork adds a configurable search box above the table to filter data down to only what you want to see without altering the card itself. Just add search: true below type. Example:

type: custom:flex-table-card
search: true
entities:
... rest of configuration

It also reduces font-size sligthtly (which was for my own preference convenience).

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Flex Table

Installation using HACS (Home Assistant Community Store)

• Use HACS inside your frontend, if unavailable here is how to install HACS
• Search for flex-table, hit install, done!
• Add the appropriate lines as provided by HACS to your lovelace ui config

Installation (as quick, only manual updates, better for developers)

• Find your home-assistent config-dir (e.g., ~/.homeassistant/) and change into ~/.homeassistant/www (create if needed)
• Run $ wget https://raw.githubusercontent.com/custom-cards/flex-table-card/master/flex-table-card.js to get the .js file
• Add at the top of your UI Lovelace config (via lovelace ui config or within .yaml)

resources:
  - type: module
    url: /local/flex-table-card.js

Quick-Start & Documentation

• Quick-Start
• (Configuration) Examples
  • Basics
  • Column Data Selector
  • Formatting
  • Sorting & Strict
  • Headers
  • Advanced Cell Formatting
  • Formatting with CSS
  • Auto Entities
  • Loading from Services
  • Adding a Summary Footer
• Configuration Reference
• How to Contribute