aaac7fed
 liuqimichale
add
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'use strict';
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var browserslist = require('browserslist');
var utils = require('./utils');
var Browsers = function () {
/**
* Return all prefixes for default browser data
*/
Browsers.prefixes = function prefixes() {
if (this.prefixesCache) {
return this.prefixesCache;
}
var data = require('caniuse-lite').agents;
this.prefixesCache = [];
for (var name in data) {
this.prefixesCache.push('-' + data[name].prefix + '-');
}
this.prefixesCache = utils.uniq(this.prefixesCache).sort(function (a, b) {
return b.length - a.length;
});
return this.prefixesCache;
};
/**
* Check is value contain any possibe prefix
*/
Browsers.withPrefix = function withPrefix(value) {
if (!this.prefixesRegexp) {
this.prefixesRegexp = new RegExp(this.prefixes().join('|'));
}
return this.prefixesRegexp.test(value);
};
function Browsers(data, requirements, options, stats) {
_classCallCheck(this, Browsers);
this.data = data;
this.options = options || {};
this.stats = stats;
this.selected = this.parse(requirements);
}
/**
* Return browsers selected by requirements
*/
Browsers.prototype.parse = function parse(requirements) {
return browserslist(requirements, {
stats: this.stats,
path: this.options.from,
env: this.options.env
});
};
/**
* Return prefix for selected browser
*/
Browsers.prototype.prefix = function prefix(browser) {
var _browser$split = browser.split(' '),
name = _browser$split[0],
version = _browser$split[1];
var data = this.data[name];
var prefix = data.prefix_exceptions && data.prefix_exceptions[version];
if (!prefix) {
prefix = data.prefix;
}
return '-' + prefix + '-';
};
/**
* Is browser is selected by requirements
*/
Browsers.prototype.isSelected = function isSelected(browser) {
return this.selected.indexOf(browser) !== -1;
};
return Browsers;
}();
module.exports = Browsers;
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