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November 13, 2017 14:12
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A way to sanitize html with DOMPurify and tagged template strings. Remember not to rely on just client-side scripting to do things like this. From es6.io
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Tagged Templates</title> | |
| <style> | |
| abbr { | |
| border-bottom:1px dotted grey; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="bio"> | |
| </div> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/dompurify/0.8.2/purify.min.js"></script> | |
| <script> | |
| function sanitize(strings, ...values) { | |
| const dirty = strings.reduce((prev, next, i) => `${prev}${next}${values[i] || ''}`, ''); | |
| return DOMPurify.sanitize(dirty); | |
| } | |
| const first = 'Wes'; | |
| const aboutMe = `I love to do evil <img src="http://unsplash.it/100/100?random" onload="alert('you got hacked');" />`; | |
| const html = sanitize` | |
| <h3>${first}</h3> | |
| <p>${aboutMe}</p> | |
| `; | |
| const bio = document.querySelector('.bio'); | |
| bio.innerHTML = html; | |
| </script> | |
| </body> | |
| </html> |
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