regex101: extract file in content string

Explanation

Pro

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 1([^'"]*\.(css|js|less|sass|txt|csv|jpeg|jpg|bmp|png|gif|json))

Negated Character Class[^'"]*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2(css|js|less|sass|txt|csv|jpeg|jpg|bmp|png|gif|json)

1st Alternativecss

cssthe literal text css (case insensitive)

2nd Alternativejs

jsthe literal text js (case insensitive)

3rd Alternativeless

lessthe literal text less (case insensitive)

4th Alternativesass

sassthe literal text sass (case insensitive)

5th Alternativetxt

txtthe literal text txt (case insensitive)

6th Alternativecsv

csvthe literal text csv (case insensitive)

7th Alternativejpeg

jpegthe literal text jpeg (case insensitive)

8th Alternativejpg

jpgthe literal text jpg (case insensitive)

9th Alternativebmp

bmpthe literal text bmp (case insensitive)

10th Alternativepng

pngthe literal text png (case insensitive)

11th Alternativegif

gifthe literal text gif (case insensitive)

12th Alternativejson

jsonthe literal text json (case insensitive)

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

g modifier: global. Finds all matches instead of stopping after the first

Quick Reference

26 tokens

Regular Expression

['"]([^'"]*\.(css|js|less|sass|txt|csv|jpeg|jpg|bmp|png|gif|json))['"]

New

var styleSwitcher = {
    initialized: !1,
    defaults: {
        saveToStorage: !0,
        preserveCookies: !1,
        colorPrimary: "#0088CC",
        backgroundColor: "light",
        headerColor: "light",
        borderRadius: "4px",
        layoutStyle: "wide",
        sidebarColor: "dark",
        sidebarSize: "md",
        changeLogo: !0
    },
    initialize: function() {
        var a = this,
            b = $("html").data("style-switcher-options");
        this.initialized || (a.options = $.extend({}, a.defaults), String.prototype.capitalize = function() {
            return this.charAt(0).toUpperCase() + this.slice(1)
        }, jQuery.styleSwitcherCachedScript = function(a, b) {
            return b = $.extend(b || {}, {
                dataType: "script",
                cache: !0,
                url: a
            }), jQuery.ajax(b)
        }, null != $.cookie("borderRadius") && (a.options.borderRadius = $.cookie("borderRadius")), null != $.cookie("colorPrimary") && (