bc518174
 王天杨
提交两个项目文件
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const BROWSER_MAPPING = {
and_chr: 'chrome',
and_ff: 'firefox',
ie_mob: 'ie',
op_mob: 'opera',
and_qq: null,
and_uc: null,
baidu: null,
bb: null,
kaios: null,
op_mini: null,
};
function browserslistToTargets(browserslist) {
let targets = {};
for (let browser of browserslist) {
let [name, v] = browser.split(' ');
if (BROWSER_MAPPING[name] === null) {
continue;
}
let version = parseVersion(v);
if (version == null) {
continue;
}
if (targets[name] == null || version < targets[name]) {
targets[name] = version;
}
}
return targets;
}
function parseVersion(version) {
let [major, minor = 0, patch = 0] = version
.split('-')[0]
.split('.')
.map(v => parseInt(v, 10));
if (isNaN(major) || isNaN(minor) || isNaN(patch)) {
return null;
}
return (major << 16) | (minor << 8) | patch;
}
module.exports = browserslistToTargets;
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