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Regular Expression in JS

var string = 'Doyletown, PA';

var parts = string.split(',');

if (parts.length > 0) {

    var result = parts[0];

    alert(result); // alerts Doyletown

}

       

var str = 'Doyletown, PA';

var newstr=str.substring(0,str.indexOf(',')) || str;

       

var str = "Doyletown, PA"

var matches = str.match(/^([^,]+)/);

alert(matches[1]);

       

//Gets all the words/sentences in a comma separated list and trims these words/sentences to get rid of outer spaces and other whitespace.

var matches = str.match(/[^,s]+[^,]*[^,s]+/g);