49 lines
929 B
JavaScript
49 lines
929 B
JavaScript
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const BROWSER_MAPPING = {
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and_chr: 'chrome',
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and_ff: 'firefox',
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ie_mob: 'ie',
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op_mob: 'opera',
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and_qq: null,
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and_uc: null,
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baidu: null,
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bb: null,
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kaios: null,
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op_mini: null,
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};
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function browserslistToTargets(browserslist) {
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let targets = {};
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for (let browser of browserslist) {
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let [name, v] = browser.split(' ');
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if (BROWSER_MAPPING[name] === null) {
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continue;
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}
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let version = parseVersion(v);
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if (version == null) {
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continue;
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}
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if (targets[name] == null || version < targets[name]) {
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targets[name] = version;
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}
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}
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return targets;
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}
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function parseVersion(version) {
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let [major, minor = 0, patch = 0] = version
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.split('-')[0]
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.split('.')
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.map(v => parseInt(v, 10));
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if (isNaN(major) || isNaN(minor) || isNaN(patch)) {
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return null;
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}
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return (major << 16) | (minor << 8) | patch;
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}
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module.exports = browserslistToTargets;
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