Extract postal code from address

PaulDBrown 

let
      regex=let   fx=(input)=>
    Web.Page(
        "<script>
            var x='"&input&"'; // this is the input string for regex
            var b=x.match(/\d{5}/gm); // specify the desired regular expression inside string.match()
                                    //https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/match 
            document.write(b);
        </script>"){0}[Data]{0}[Children]{1}[Children]{0}[Text]

in
fx,
    Source = Web.BrowserContents("https://community.powerbi.com/t5/Power-Query/Extract-postal-code-from-address/m-p/2218442#M65740"),
    #"Extracted Table From Html" = Html.Table(Source, {{"Column1", "TABLE:nth-child(5) > * > TR > :nth-child(1)"}}, [RowSelector="TABLE:nth-child(5) > * > TR"]),
    #"Changed Type" = Table.TransformColumnTypes(#"Extracted Table From Html",{{"Column1", type text}}),
    #"Added Custom" = Table.AddColumn(#"Changed Type", "Custom", each regex([Column1]))
in
    #"Added Custom"

https://community.powerbi.com/t5/Community-Blog/Using-JavaScript-in-power-query-for-regex-Part2/ba-p/2132960

https://community.powerbi.com/t5/Community-Blog/How-to-use-JavaScript-inside-power-query-for-data-extraction/ba-p/1632844