refactor: move variables to parent scope and clean-up

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
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    status: passed
  - task: lint_editorconfig
    status: passed
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    status: passed
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    status: passed
---

Author: kgryte

lib/node_modules/@stdlib/plot/base/view/lib/electron/index.js

@@ -18,8 +18,6 @@
 
 'use strict';
 
-// TODO: refactor. Remove disposable server. Create a server in the electron process and have it serve assets from local directories. Should be similar to SimpleServer.
-
 // MODULES //
 
 var spawn = require( 'child_process' ).spawn;
@@ -29,6 +27,7 @@ var instanceOf = require( '@stdlib/assert/instance-of' );
 var ENV = require( '@stdlib/process/env' );
 var copy = require( '@stdlib/utils/copy' );
 var merge = require( '@stdlib/utils/merge' );
+var replace = require( '@stdlib/string/base/replace' );
 var readFileSync = require( '@stdlib/fs/read-file' ).sync;
 var createServer = require( '@stdlib/plot/base/server' );
 var tryRequire = require( '@stdlib/utils/try-require' );
@@ -42,12 +41,17 @@ var electron = tryRequire( '@stdlib/electron' );
 var FOPTS = {
 	'encoding': 'utf8'
 };
+var INDEX_TEMPLATE = path.join( __dirname, 'index.html' );
+var RESET_CSS = path.join( __dirname, 'css', 'reset.css' );
+
+var RE_PLOT = /\{\{plot\}\}/;
+var RE_RESET_CSS = /\{\{reset\}\}/;
 
 
 // MAIN //
 
 /**
-* Opens a plot in an electron window.
+* Opens a plot in an Electron window.
 *
 * @private
 * @param {Object} plot - plot context
@@ -66,14 +70,12 @@ function view( plot, html ) {
 		throw new Error( 'invalid operation. Unable to load Electron. Ensure Electron is installed and try again.' );
 	}
 	debug( 'Injecting HTML into HTML template...' );
-	index = path.join( __dirname, 'index.html' );
-	index = readFileSync( index, FOPTS );
-	index = index.replace( /\{\{plot\}\}/, html );
+	index = readFileSync( INDEX_TEMPLATE, FOPTS );
+	index = replace( index, RE_PLOT, html );
 
 	debug( 'Injecting CSS into HTML template...' );
-	css = path.join( __dirname, 'css', 'reset.css' );
-	css = readFileSync( css, FOPTS );
-	index = index.replace( /\{\{reset\}\}/, css );
+	css = readFileSync( RESET_CSS, FOPTS );
+	index = replace( index, RE_RESET_CSS, css );
 
 	debug( 'Creating a server...' );
 	createServer( router, onReady );