32 lines
922 B
JavaScript
32 lines
922 B
JavaScript
import { ToString } from './262';
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/**
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* https://tc39.es/ecma402/#sec-getoption
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* @param opts
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* @param prop
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* @param type
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* @param values
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* @param fallback
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*/
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export function GetOption(opts, prop, type, values, fallback) {
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if (typeof opts !== 'object') {
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throw new TypeError('Options must be an object');
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}
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var value = opts[prop];
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if (value !== undefined) {
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if (type !== 'boolean' && type !== 'string') {
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throw new TypeError('invalid type');
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}
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if (type === 'boolean') {
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value = Boolean(value);
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}
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if (type === 'string') {
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value = ToString(value);
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}
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if (values !== undefined && !values.filter(function (val) { return val == value; }).length) {
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throw new RangeError("".concat(value, " is not within ").concat(values.join(', ')));
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}
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return value;
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}
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return fallback;
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}
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