| 1 | 'use strict';
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| 2 | const htmlCommentRegex = require('html-comment-regex');
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| 3 |
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| 4 | const isBinary = buffer => {
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| 5 | const isBuffer = Buffer.isBuffer(buffer);
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| 6 |
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| 7 | for (let i = 0; i < 24; i++) {
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| 8 | const characterCode = isBuffer ? buffer[i] : buffer.charCodeAt(i);
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| 9 |
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| 10 | if (characterCode === 65533 || characterCode <= 8) {
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| 11 | return true;
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| 12 | }
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| 13 | }
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| 14 |
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| 15 | return false;
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| 16 | };
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| 17 |
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| 18 | const regex = /^\s*(?:<\?xml[^>]*>\s*)?(?:<!doctype svg[^>]*\s*(?:\[?(?:\s*<![^>]*>\s*)*\]?)*[^>]*>\s*)?<svg[^>]*>[^]*<\/svg>\s*$/i;
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| 19 |
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| 20 | const isSvg = input => Boolean(input) && !isBinary(input) && regex.test(input.toString().replace(htmlCommentRegex, ''));
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| 21 |
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| 22 | module.exports = isSvg;
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| 23 | module.exports.default = isSvg;
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