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nkabrown/proxy-list-format.js

Last active June 5, 2019 03:09
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Return a default value when passing empty arrays to Intl.ListFormat
Raw
proxy-list-format.js
var countryList = ['Mexico', 'United States', 'Canada'];
// prefer not to use the Oxford comma so use locale 'en-GB'
var phraseFormatter = new Intl.ListFormat('en-GB', {type: 'conjunction'});
phraseFormatter.default = 'North America';
// see http://exploringjs.com/es6/ch_proxies.html#_intercepting-method-calls
const handler = {
get(target, key) {
return function(args) {
console.log(args);
return key == 'format' && args.length == 0 ? target.default : target.format(args);
};
}
}
var phraseProxy = new Proxy(phraseFormatter, handler);
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