This extension is adapted from the sample VS code extension decorator-sample, inspired by atom-quick-highlight.

It creates a decoration for each selected word that appears in all editors.

• You can add words by chosing Highlight Toggle Current from the command pallet, this will highlight the word at the cursor or the selection.
• To stop highlighting, choose Highlight Remove, then the desired word or expression, or all
• You may also remove all from the command Highlight Remove All without the prompt for selection
• To highlight using regular expression choose Highlight Expression and enter expression(slashes optional, can ignore case with /expression/i(g flag is automatic, i flag accepted, all others ignored).
• To highlight with options choose Highlight Selection with Options and choose whole word, ignore case or both when presented
• You can set the mode for "Highlight Toggle Current" from the Set Highlight Mode command. The default can be set in the configuration.
• Sidebar can show in explorer view and can be toggled on and off with Highlight Toggle Sidebar command. This provides features such as navigating highlighted items, context menu for changing options and removing.

The following options can be configured

highlightwords.colors: this is an array of light/dark pairs for respective theme types, you can have as few or as many as you like

highlightwords.box: show highlights as a box around the selections if true, set highlight as background color if false

highlightwords.defaultMode: the initial mode when initialized. 0=default, 1=whole word, 2=ignore case, 3=whole word and ignore case

highlightwords.showSidebar provides a view in the explorer window for searching, changing options and removing highlights

defaults shown below

"highlightwords.colors": [
    { "light": "#b3d9ff", "dark": "cyan" },
    { "light": "#e6ffb3", "dark": "pink" },
    { "light": "#b3b3ff", "dark": "lightgreen" },
    { "light": "#ffd9b3", "dark": "magenta" },
    { "light": "#ffb3ff", "dark": "cornflowerblue" },
    { "light": "#b3ffb3", "dark": "orange" },
    { "light": "#ffff80", "dark": "green" },
    { "light": "#d1e0e0", "dark": "red" }                                        
    ...
],
"highlightwords.box": {
    "light": false,
    "dark": true
},
"highlightwords.defaultMode": {
    "default": 0
}

"highlightwords.showSidebar": {
    "default": true
}