1 |
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2 |
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3 |
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4 |
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5 | var camel2hyphen = function camel2hyphen(str) {
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6 | return str.replace(/[A-Z]/g, function (match) {
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7 | return '-' + match.toLowerCase();
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8 | }).toLowerCase();
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9 | };
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10 |
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11 | var isDimension = function isDimension(feature) {
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12 | var re = /[height|width]$/;
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13 | return re.test(feature);
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14 | };
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15 |
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16 | var obj2mq = function obj2mq(obj) {
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17 | var mq = '';
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18 | var features = Object.keys(obj);
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19 | features.forEach(function (feature, index) {
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20 | var value = obj[feature];
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21 | feature = camel2hyphen(feature);
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22 |
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23 | if (isDimension(feature) && typeof value === 'number') {
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24 | value = value + 'px';
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25 | }
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26 |
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27 | if (value === true) {
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28 | mq += feature;
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29 | } else if (value === false) {
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30 | mq += 'not ' + feature;
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31 | } else {
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32 | mq += '(' + feature + ': ' + value + ')';
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33 | }
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34 |
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35 | if (index < features.length - 1) {
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36 | mq += ' and ';
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37 | }
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38 | });
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39 | return mq;
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40 | };
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41 |
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42 | export default function (query) {
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43 | var mq = '';
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44 |
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45 | if (typeof query === 'string') {
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46 | return query;
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47 | }
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48 |
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49 |
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50 | if (query instanceof Array) {
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51 | query.forEach(function (q, index) {
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52 | mq += obj2mq(q);
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53 |
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54 | if (index < query.length - 1) {
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55 | mq += ', ';
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56 | }
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57 | });
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58 | return mq;
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59 | }
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60 |
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61 |
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62 | return obj2mq(query);
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63 | } |
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