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30 lines
804 B
JavaScript
30 lines
804 B
JavaScript
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'use strict';
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var trimStart = require('string.prototype.trimstart');
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var trimEnd = require('string.prototype.trimend');
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var GetIntrinsic = require('get-intrinsic');
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var $TypeError = GetIntrinsic('%TypeError%');
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var RequireObjectCoercible = require('./RequireObjectCoercible');
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var ToString = require('./ToString');
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// https://262.ecma-international.org/10.0/#sec-trimstring
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module.exports = function TrimString(string, where) {
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var str = RequireObjectCoercible(string);
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var S = ToString(str);
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var T;
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if (where === 'start') {
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T = trimStart(S);
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} else if (where === 'end') {
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T = trimEnd(S);
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} else if (where === 'start+end') {
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T = trimStart(trimEnd(S));
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} else {
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throw new $TypeError('Assertion failed: invalid `where` value; must be "start", "end", or "start+end"');
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}
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return T;
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};
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