├── .editorconfig
├── LICENSE
├── README.md
├── currentScript.js
└── package.json


/.editorconfig:
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1 | [*]
2 | indent_style = space
3 | indent_size = 2


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/LICENSE:
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 1 | The MIT License (MIT)
 2 | 
 3 | Copyright (c) 2015 Adam Miller
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 
23 | 


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/README.md:
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1 | # document.currentScript Polyfill
2 | 
3 | #### An exceptionally slim (~310b minified) polyfill for document.currentScript in IE9-IE11
4 | 
5 | This polyfill may not adhere strictly to spec when called in async code or in a callback. In these situations the spec calls for document.currentScript to return null. However, for the grand majority of your document.currentScript needs, this polyfill will do the job!
6 | 


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/currentScript.js:
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 1 | // document.currentScript polyfill by Adam Miller
 2 | 
 3 | // MIT license
 4 | 
 5 | (function (document) {
 6 |   var currentScript = 'currentScript';
 7 | 
 8 |   // If browser needs currentScript polyfill, add get currentScript() to the document object
 9 |   if (!(currentScript in document)) {
10 |     Object.defineProperty(document, currentScript, {
11 |       get: function () {
12 |         // IE 8-10 support script readyState
13 |         // IE 11+ support stack trace
14 |         try {
15 |           throw new Error();
16 |         }
17 |         catch (err) {
18 |           // Find the second match for the "at" string to get file src url from stack.
19 |           // Specifically works with the format of stack traces in IE.
20 |           var i = 0,
21 |             stackDetails = (/.*at [^(]*\((.*):(.+):(.+)\)$/ig).exec(err.stack),
22 |             scriptLocation = (stackDetails && stackDetails[1]) || false,
23 |             line = (stackDetails && stackDetails[2]) || false,
24 |             currentLocation = document.location.href.replace(document.location.hash, ''),
25 |             pageSource,
26 |             inlineScriptSourceRegExp,
27 |             inlineScriptSource,
28 |             scripts = document.getElementsByTagName('script'); // Live NodeList collection
29 | 
30 |           if (scriptLocation === currentLocation) {
31 |             pageSource = document.documentElement.outerHTML;
32 |             inlineScriptSourceRegExp = new RegExp('(?:[^\\n]+?\\n){0,' + (line - 2) + '}[^<]*<script>([\\d\\D]*?)<\\/script>[\\d\\D]*', 'i');
33 |             inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();
34 |           }
35 | 
36 |           for (; i < scripts.length; i++) {
37 |             // If ready state is interactive, return the script tag
38 |             if (scripts[i].readyState === 'interactive') {
39 |               return scripts[i];
40 |             }
41 | 
42 |             // If src matches, return the script tag
43 |             if (scripts[i].src === scriptLocation) {
44 |               return scripts[i];
45 |             }
46 | 
47 |             // If inline source matches, return the script tag
48 |             if (
49 |               scriptLocation === currentLocation &&
50 |               scripts[i].innerHTML &&
51 |               scripts[i].innerHTML.trim() === inlineScriptSource
52 |             ) {
53 |               return scripts[i];
54 |             }
55 |           }
56 | 
57 |           // If no match, return null
58 |           return null;
59 |         }
60 |       }
61 |     });
62 |   }
63 | })(document);
64 | 


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/package.json:
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 1 | {
 2 |   "name": "current-script-polyfill",
 3 |   "version": "1.0.0",
 4 |   "description": "An exceptionally slim (~310kb minified) polyfill for document.currentScript in IE9+",
 5 |   "main": "currentScript.js",
 6 |   "scripts": {},
 7 |   "repository": {
 8 |     "type": "git",
 9 |     "url": "https://github.com/epicmiller/currentScript-polyfill.git"
10 |   },
11 |   "author": "Adam Miller",
12 |   "license": "MIT",
13 |   "readmeFilename": "README.md",
14 |   "dependencies": {},
15 |   "devDependencies": {}
16 | }
17 | 


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