refactor: Enable strict mode for all files

Only a single change (in `lib/static.js`) was necessery as a consequence.

.eslintrc.json

@@ -28,6 +28,7 @@
     "no-use-before-define": [2, "nofunc"],
     "no-void": 2,
     "yoda": 2,
+    "strict": 2,
 
     "jsdoc/require-jsdoc": 0,
     "jsdoc/check-param-names": 2,

benchmark/benchmark.js

@@ -1,4 +1,5 @@
 #!/usr/bin/env node
+'use strict';
 
 var Suites = require('./suite');
 var suites = new Suites();

benchmark/suite.js

@@ -1,3 +1,4 @@
+'use strict';
 var fs = require('fs');
 var path = require('path');
 

index.js

@@ -1,3 +1,4 @@
+'use strict';
 /**
  * @module cheerio
  * @borrows static.load as load

lib/api/attributes.js

@@ -1,3 +1,4 @@
+'use strict';
 /**
  * Methods for getting and modifying attributes.
  *

lib/api/css.js

@@ -1,3 +1,4 @@
+'use strict';
 /** @module cheerio/css */
 
 var domEach = require('../utils').domEach;

lib/api/forms.js

@@ -1,3 +1,4 @@
+'use strict';
 /** @module cheerio/forms */
 
 // https://github.com/jquery/jquery/blob/2.1.3/src/manipulation/var/rcheckableType.js

lib/api/manipulation.js

@@ -1,3 +1,4 @@
+'use strict';
 /**
  * Methods for modifying the DOM structure.
  *

lib/api/traversing.js

@@ -1,3 +1,4 @@
+'use strict';
 /**
  * Methods for traversing the DOM structure.
  *

lib/cheerio.js

@@ -1,3 +1,4 @@
+'use strict';
 /*
   Module dependencies
 */

lib/options.js

@@ -1,3 +1,4 @@
+'use strict';
 /** Cheerio default options. */
 exports.default = {
   xml: false,

lib/parse.js

@@ -1,3 +1,4 @@
+'use strict';
 /*
   Module Dependencies
 */

lib/parsers/htmlparser2.js

@@ -1,2 +1,3 @@
+'use strict';
 exports.parse = require('htmlparser2').parseDocument;
 exports.render = require('dom-serializer').default;

lib/parsers/parse5.js

@@ -1,3 +1,4 @@
+'use strict';
 var parse5 = require('parse5');
 var htmlparser2Adapter = require('parse5-htmlparser2-tree-adapter');
 

lib/static.js

@@ -1,3 +1,4 @@
+'use strict';
 /**
  * @module cheerio/static
  * @ignore
@@ -117,7 +118,7 @@ exports.html = function (dom, options) {
   options = Object.assign(
     {},
     defaultOptions,
-    this._options,
+    this ? this._options : {},
     flattenOptions(options || {})
   );
 

lib/utils.js

@@ -1,3 +1,4 @@
+'use strict';
 var htmlparser2 = require('htmlparser2');
 var domhandler = require('domhandler');
 

test/__fixtures__/fixtures.js

@@ -1,3 +1,4 @@
+'use strict';
 exports.fruits = [
   '<ul id="fruits">',
   '<li class="apple">Apple</li>',

test/api/attributes.js

@@ -1,3 +1,4 @@
+'use strict';
 var cheerio = require('../..');
 var fruits = require('../__fixtures__/fixtures').fruits;
 var vegetables = require('../__fixtures__/fixtures').vegetables;

test/api/css.js

@@ -1,3 +1,4 @@
+'use strict';
 var cheerio = require('../..');
 
 describe('$(...)', function () {

test/api/deprecated.js

@@ -1,3 +1,4 @@
+'use strict';
 /**
  * This file includes tests for deprecated APIs. The methods are expected to be
  * removed in the next major release of Cheerio, but their stability should be

test/api/forms.js

@@ -1,3 +1,4 @@
+'use strict';
 var cheerio = require('../..');
 var forms = require('../__fixtures__/fixtures').forms;
 

test/api/manipulation.js

@@ -1,3 +1,4 @@
+'use strict';
 var cheerio = require('../..');
 var fruits = require('../__fixtures__/fixtures').fruits;
 var divcontainers = require('../__fixtures__/fixtures').divcontainers;

test/api/traversing.js

@@ -1,3 +1,4 @@
+'use strict';
 var cheerio = require('../..');
 var food = require('../__fixtures__/fixtures').food;
 var fruits = require('../__fixtures__/fixtures').fruits;

test/api/utils.js

@@ -1,3 +1,4 @@
+'use strict';
 var fixtures = require('../__fixtures__/fixtures');
 var cheerio = require('../..');
 

test/cheerio.js

@@ -1,3 +1,4 @@
+'use strict';
 var htmlparser2 = require('htmlparser2');
 var cheerio = require('..');
 var fixtures = require('./__fixtures__/fixtures');

test/parse.js

@@ -1,3 +1,4 @@
+'use strict';
 var parse = require('../lib/parse');
 var defaultOpts = require('../lib/options').default;
 

test/xml.js

@@ -1,3 +1,4 @@
+'use strict';
 var cheerio = require('..');
 
 function xml(str, options) {